Opa2134 vs tl072


Opa2134 vs tl072. (non inverting amplifier) Patrik Floding said: kzeprf22, It seems the opa2134 uses at least twice as much current as the TL072. The OPA2134 Op-Amp Sep 20, 2011 · Is the input DC coupled from "V3 A" or is there a decoupling cap? If it is DC coupled (or a leaky decoupling cap) then any offset is going to reduce the usable signal level before asymmetric clipping occurs. 4mA, respectively. The LF353 was even worse in this respect. For a single op-amp, the TL071 is generally considered a good choice. The LF353 and TL072 are pretty much interchangeable and both about as old as dirt. Opamps surveyed: BJT input types The rest of this chapter looks at some opamp types and examines their performance, with the 5532 the usual basis for comparison. I no nothing about this. Aug 18, 2023 · The NE5532 typically requires a higher minimum power supply voltage compared to the TL072. I may blow a few more but I've got boxes of TL0xx to play with. 💎 Input Bias Current: The TL072 generally has lower input bias current compared to the NE5532. THD+N level of all right channels is almost identical at -94 dBV. The TLE2072 costs so much more than a TL072, I don't think the bang-for-your-buck is there and the OPA2134 comes in significantly better for THD and line driving and isn't that much more expensive than a TLE2072. Now all the folks are using opa2134 op -amps as the replacement. Sep 17, 2021 · The OPA2134 is a Dual Package Operational Amplifier, meaning it has two Op-Amps inside it and each Op-Amp can be used independently. But its the same old Coke vs Pepsi,Tastes great,Less filling debate. LM4562 vs TL072 and NE5532 Dec 17, 2011 · The TL072 is my current workhorse and I use the OPA2134 in critical audio applications when I need to. Feb 8, 2022 · The NE5532 is a Bipolar Input op-amp, whereas the OPA2134 is a FET Input op-amp. I've studied around in different forums and found information about differences between the resistor value going to ground. ••• Mar 19, 2014 · TL072 VS NE5532. Aug 28, 2023 · LM4562 vs NE5532: What are Differences and How to Dec 8, 2021 · Note: Complete Technical Details can be found in the OPA2134 datasheet given at the end of this page. The main distinguishing feature of the OPA2134 Op-Amp is that they are ultra-low distortion, low-noise operational amplifiers fully specified for audio applications. In the circuit i use INA128 as In-Amp and TL072 as Op-Amp. What is rail to rail? A power rail is a power supply line provided by a power supply unit. OPA2134 Equivalent Op-Amp. TL072 VS NE5532. For high freq the OPA2134 is suppose to beat the TL072 in performance, I have read ( : Go for TL072 or OPA2134? May 24, 2015 · The OPA2134 is more a better replacement for the TL072 when you need a FET type. It may or may not sound at all noticeably better than a TL072, it depends on the circuit and application. It is a really nice-sounding chip in the right place, but man it is expensive and you can get nearly there for a lot less in trouble as well Dec 6, 2018 · The OPA627 is mainly good for very low input bias - usually no need for this with audio. The TL07x opamps have a problem called "phase inversion" where the output suddenly inverts when an input goes lower than the allowed common-mode Feb 26, 2020 · TL072: 13 V/μs OPA2134: 20 V/μs Keep in mind that once you have more slew-rate than you need, nothing is gained by having an even higher slew-rate. From what I understand the 353 has a better GBW. I just thought using two opa627, i will achieve 2134's audio quality. Both are good opamps for the price, and I prefer either of them over the NE5532. Feb 16, 2007 · OPA2134 Vs NE5532 OPA2134 Vs NE5532. ••• Jul 7, 2024 · Working: The TL072 is a dual Op Amp IC that operates as a voltage amplifier. If your application is sensitive to input currents, the TL072 might be more suitable. TL082 Operational Amplifier FAQ. Sep 11, 2013 · Quote from: wavley on September 12, 2013, 04:35:04 PM Of course a lot of audiophools dislike the 5532, but it's an honestly good op amp. 37 show the device working at a gain of 3× in both shunt and series-feedback modes. We get lower current noise and better EMI resistence. Af Jan 24, 2006 · Outputs may be better driven by NE5532, is it? And filter (at least hi freq range) I'd also prefer to change to NE5532, or possibly opa2134. That would also make sense of the measurements. amplitude for all opamps (with 560 ohm shunt resistors). By all accounts, that's one leaky input. The OPA2134 (and OPA4134) coming from Burr-Brown have some really nice slew rates (20 vs. TL071/2 is lower current at 1. To my ears, it sounds much better and has good bass. 67 at Mouser) is a drop in replacement for the NE5532. Normal audio can use the cheaper OPA2134. TL082 is a more noisier replacement, and is fully voltages and pin´s compatible, but TL072is a very common IC, you can buy it elsewhere. Opa2134 is a very good opamp. Jun 9, 2015 · Not sure why it would need to be a JFET type here - the impedances are low. Please subscribe for more demos of vintage & rare effects pedals!Today, I want to take a very brief look at Op-Amp chip Apr 16, 2011 · Just to add to your list, the OPA2134 ($2. The OPAx132 is the slightly better version for DC critical applications. 5만원 미만으로 일반 앰프에 범용으로 가장 많이 적용되는 TL072 를 대신할 핫템으로 각광 받아왔습니다. オペアンプの違いによる音質比較表 Gibson Les Paul Studio - ADA MP-1 tube preamp /JJ ECC83/ - H&K RedBox MKIII - Audigy ZS2 SoundCard May 16, 2016 · By comparison, the TL072 showed HF ringing effects on the burst tests - this could probably account for the "different" sound of that type of device. I use a EMG amplifier circuit. It has way more drive capability than TL072 which is about the wimpiest audio opamp I've come across for load tolerance. There is something else going on as well. I have a 1988 carver stereo per-amplifier. I feel confident in replacing a TL072 with an OPA2134 as the DIY community accepts that this is a safe swap. If getting the best sound is your primary aim then the lowest hanging fruit for me in every single piece that I've modified has been power supplies, not opamps. A true FET input stage is incorporated to May 25, 2018 · Part Number: INA129 Other Parts Discussed in Thread: OPA2134, , INA128, TL072, TINA-TI Hello. To turn a TL072 into a TL071 make an adapter that connects one of the opamps in the TL072 to pins 2, 3, and 6 and the power supply to pins 4 and 7. We would like to show you a description here but the site won’t allow us. It needs to be mounted on an adapter to be used here. At the time of writing (2009) the TL052 costs at least twice as much as the TL072. Noise level is basically the same in LM4562 and NE5532, while OPA2134 is 2 dB weaker. e. Sep 30, 2010 · But the "new" 2134 case fits the 072 build to the T - and I am willing to bet my last dirty PJ that this is a counterfeit TL072 re-marked as a OPA2134. It is commonly used in audio applications where a dual amplifier configuration is required. The AD8599 is on it way and some highly respect it. Are you suggesting it is the 353 vs TL072 that is the issue here? ANOTHER EDIT: Oh my goodness I am losing my mind. The NE5532 and TL072 are two prominent operational amplifiers (op-amps) that have earned their place in the world of electronics for their versatile performance and widespread applications. Where to use OPA2134 Op-Amp. Feb 1, 2006 · OPA2134 is a far easier drop-in replacement for the TL072. Aug 16, 2024 · So I've changed TL072 op-amp to OPA2134 on ART Tube MP V3 preamp. Everything is working except it appears that high-shelf cut is being created (~9 dB at 10 kHz) (measured with pro audio interface using REW). In this article, we will delve into the Published: 2023-08-18 18:01:28 Dec 4, 2017 · TL072 OP-AMP IC Pinout, Pin Configuration, Equivalents, Feb 11, 2021 · According to the TI datasheets OPA1612 has less noise than OPA1656. Plus, I don't know how it will affect other parts in the circuit, and if this will cause a chain meltdown. If I were going to all the trouble of swapping them out I would make it worth while and do the OPA2134 or similar LT part. If I have any inspiration, I'll post it. Goggle bill d mod carver c-1. Tl074, Tl072, LM358, LM338 . When the original OP is Bipolar(like NE5532 etc) we can most always replace with FET or another similar Bipolar OP. And if we take the price into account, they are just great! They have 13V/uS slewrate OPA2134 is next step for JFET opamps. . Thread starter WhiteRhino; Start date 2014-03-19 10:19 am; Status A bit like the OPA2134 overall, it's got strong drive like the 5532, super low Sep 29, 2008 · TL071, TL081, TL072, TL082 are good for many audio applications. OPA2134 vs TL072? Apr 14, 2022 · There are some major differences between OPA2134 and TL072; for one, since OPA2134 has a unity-gain bandwidth of 8MHz vs 3MHz in the case of TL072, there is a significant difference in the typical quiescent current: 4mA vs 1. ••• Jan 11, 2016 · Yes sir. Like the TL072, the TL052 is relatively relaxed about supply-rail decoupling. Choose the one that matches your available voltage range. Jun 8, 2009 · They are low power (the LM358 uses 40% of the current of a dual TL072) but have severe crossover distortion and have a response to only 2kHz (the TL072 has very low distortion and goes to 100kHz). Oct 30, 2022 · What op-amp could substitute a TL072? Jul 30, 2016 · The 2132 (first test) or TL072 (second test) is the integrator in both cases. g. Feb 13, 2016 · The OPA2134 in contrast costs $4. 2700ohm is way too low a load to get decent sound from a TL072 but an NE5532 won't much notice providing its well decoupled. Right now - the TLE2142ID is looking like a good choice. 4mA typ per amplifer but noise is higher at 18nV / rt Hz than the OPA2134's 8nV / rt Hz although lower than the 062's 42 nV / rt Hz ( with it's 200uA typ per amplifer Icc ). The OPA 627 is well over price and is bass heavy and it’s not worth the price you pay for it The OPA1612 and OPA827 are much better than any of these but these are SOIC and you’ll need an adapter with experience soldering skills. Left channel is 5-10 dB better but there is also more variance between boards/opamps. Also a TS912, or TLC272. #3. I'd like to find a 3rd choice for critical/precision DC circuits e. The two versions of the DUSG I tested were: 1) OPA2134 where the schematic shows LF353; LF353 where it shows TL072 2) TL072s all the way. Aug 28, 2023 · NE5532 vs TL072: What are Differences and How to Choose 2023. Nov 8, 2006 · In Active crossover application, OPA2134 and OPA2604 Mar 19, 2014 · TL072 VS NE5532 . A Dec 29, 2023 · I'm playing around with some simple headphone amps ( again ) with NE5532 vs. G. How about line inputs? Any suggestions? Is FET vs bipolar of any significance in such line level circuits? Posted: Wed May 19, 2010 9:09 pm Post subject: OPA2134 vs. OPA2134 OP amps. Noise and distortion wise OPA1641 or OPA827 perform better. In most pedals where a dual op amp is needed I feel the TL072 does a good or even great job though. Aug 23, 2017 · There are some major differences between OPA2134 and TL072; for one, since OPA2134 has unity-gain bandwdth of 8MHz vs 3MHz in case of TL072, there is a significant difference in the typical quiescent current: 4mA vs 1. It also has Other Parts Discussed in Thread: OPA2134 , TL072 请注意,本文内容源自机器翻译,可能存在语法或其它翻译错误,仅供参考。如需获取准确内容,请参阅链接中的英语原文或自行翻译。 Nov 25, 2015 · I asked a simple question, and your reply is quoting somebody's book -with over "200" tests, yet you can't point to ONE that shows your assertion that:" If a person can hear a difference in electronic circuits, there are tests that can easily IC opam âm thanh cao cấp MUSES02 chính hãng JRC ( có Aug 29, 2011 · The power consumption is higher, typically 2. It offers exceptional performance in almost any audio application. Since i couldnt find an opa2134, i just use tl072 and the likes for our projects I am just curious how opa2134's output performance. Jun 13, 2016 · 【やってみた】オペアンプ聴き比べ、最強のオペアンプ決定戦 Jan 23, 2014 · OPA2134 seems much better but the downside is that they take about twice the current and need much more careful decoupling. May 30, 2007 · If the orginal OP is a FET (like TL072, OPA2134 etc) we may be careful sometimes NOT possible to replace with Bipolar (like NE5532 etc). Has anyone had any problems using these as generic drop-in Feb 10, 2022 · LM358, TL074, OPA2134, TL072. Has anyone had any problems using these as generic drop-in Feb 11, 2021 · When low bias currents are needed with superior performance then the OPA2134 is often a good choice, though it is at least four times as expensive as the TL072. Aug 30, 2024 · G'day all, an interesting thread. I think the OPA2134 is easily surpassed by Jan 8, 2017 · Below are THD+N vs. Part Number: OPA2134 Other Parts Discussed in Thread: OPA1678, OPA1611, OPA1602, OPA1642. exponential converters - but that will also be happy handling audio if needed. Nov 29, 2023 · Exploring TL072 OP-AMP IC Pinout, Datasheet, Where & Apr 6, 2020 · The OPA2134 is very ordinary, I consider it a side step to the NE5532. 36 and 4. 1. But testing and stabilising is not the concern here. TL072 Pinout Mar 13, 2023 · A TL072 is two TL071 in one package. The last CMOS 12V max supply. Has anyone had any problems using these as generic drop-in replacements for TL074, LF444, etc? Other Parts Discussed in Thread: OPA2134 , INA129 , INA128 , TL072 , TINA-TI 请注意,本文内容源自机器翻译,可能存在语法或其它翻译错误,仅供参考。 如需获取准确内容,请参阅链接中的英语原文或自行翻译。 Mar 31, 2005 · For a dual op-amp, you can't go wrong if you choose the TL072, NE5532 or OPA2134. Reply reply Sep 20, 2011 · So with the higher power, the more heat it will generate. 4kHz bandwidth Here we see that the LM4562, LM833, LM49720 and OPA2134 all have the same level of performance with the NJM2742 having the worst performance of the bunch and the LT1352 being just slightly worse. Also, if you use SOIC (D) package, TL072 thermal resistance is 97C/W vs 150C/W in case of OPA2134. The OPA2134 is a Dual Package Operational Amplifier, meaning it has two Op-Amps inside it and each Op-Amp can be used independently. Posted: Wed May 19, 2010 9:09 pm Post subject: OPA2134 vs. OPA1612 sounds better than any transistor preamp I've ever heard and better then my own 6N6P 2 case -no barrels hold- 36kg monster preamp with a 100% double blind test win rate. From my reading on this subject, it seems that many fake OPA2134's are simply 'restamped' TLO72's for example. I don't see how changing the opamp Feb 8, 2019 · I built a few CGS/Serge panels a while back and used lots of OPA2134 (which are at least a dollar more on Tayda than they were back then :0 ). High slew rates, low input bias and offset currents, and a low offset voltage temperature coefficient characterize the devices. Although many people consider the NE5532 to be an old component and try to find a new one to replace it, the NE5532 is still adequate for most applications. Mar 21, 2022 · TL072 Overview. NE5532 Pinout. Even the relatively humble TL072 can sound very good when its fed the cleanest, lowest impedance power. By Shahriar February 16, 2007 in Some of the opamps like the TL072 have increased distortion when their output is overloaded. The TL072 is a high-speed J–FET input dual operational amplifier with well-matched high voltage J–FET and bipolar transistors in a monolithic integrated circuit. OPA2134 doesn't quite have this advantage but has other good points. TL082 Dimensions in inches (millimeters) Download TL082 Amplifier Datasheet. Please contact the webmaster or board administrator for more information. Wampler has a great video comparing different op amps in a clipping circuit that you can look up on YouTube if you like. As a result, the NE5532 is three times quieter Jun 26, 2005 · JRC4558: Maybe a bit punchier -- nominal difference from the LM1458 TL072: Maybe a bit thin -- nominal difference from the LM1458 Lesson I learned: LM1458 op amps are the cheapest around, they work find in my amp -- put them in and forget them. It depends very much on the circuit if a faster OP can be used. Other Parts Discussed in Thread: LME49720, LM4562, OPA1654, OP07, OPA2134, TL072, OPA1652 首先关于LME49710、LME49720、LM4562这3款运放一直有个疑问,究竟这三者之间是什么关系,LME49710是单运放,另外2款是双运放,LM4562是LME49710的双运放版本吗? When I first built the breadboard DS-1 for my previous video about the Aria Distortion, I thought I had made a mistake because it just didn't sound right. Jul 29, 2002 · Haha, in fact, it makes you wonder if a "better" opamp will yield just as much (or more) improvements over Burson. The NE5532 and the LM833 performed pretty much as well as the 4558, except with a slightly lower noise floor and with a slightly "spikier" recovery from JFET入力のOPAMP比較 TL072 NJM072 NJM2082 I've used OPA2134 (TL072) and TLE2074 (TL074) in some builds, you don't really want the better quality parts if you want clipping and distortion. 거기에 약간 무리를 하자면 OPA627 이나 AD8620, 더 나가면 OPA128SM 같은 캔 op 나 디스크릿 op 까지 가죠. Jun 10, 2010 · Tle2072 is a pretty much direct replacement for TL072. Another way to say it: JFET OPamps like OPA2134 can replace most any other audio opamp オペアンプの違いによる音質比較表 Apr 7, 2007 · Quick review of the AD823 vs OPA2132 vs AD8066 Posted: Wed May 19, 2010 9:09 pm Post subject: OPA2134 vs. Thread starter WhiteRhino; Start date 2014-03-19 10:19 am; Status In recent years I've been using the OPA2134 which is a bit better (Linkwitz Jan 7, 2021 · So considering NE5532, LM4562 and OPA2134, OPA2134 gives best measured results in AIYIMA A07. 2: Uses: The TL072 is commonly used in various applications, with frequent application in audio mixers and preamplifiers. TL072 Subject description: Drop-in upgrade? The OPA2134 (and OPA4134) coming from Burr-Brown have some really nice slew rates (20 vs. more Posted: Wed May 19, 2010 9:09 pm Post subject: OPA2134 vs. Practice suggests that TL072 is a good compromise choice. it boasts a 40u/vs slew. Nov 25, 2015 · LM4562 vs OPA2134 vs [ ? ] Jul 26, 2019 · I ask this as although I have used many OPA2134's over the years I have seen a few that appear to be 'sub standard' in some respects (noisy for example). If there are more complicated parts (especially active parts) in the FB path, a faster OP can be a problem. Moreover, It offers low noise and a high gain bandwidth product, making it suitable for audio applications and signal conditioning. When an opamp is overdriven, the input stage saturates. 15V/us), noise rejection (120db vs 70-80db), lower offset, much closer to rail outputs, etc. Oct 16, 2008 · Have you tried to copy ( to draw ) the circuit from a piece of equipment or have you actually built it like the circuit shows. I would configure the remaining opamp in the TL072 as a buffer and ground its input just so it doesn't chatter or does anything irrational. The two THD plots in Figures 4. The bipolar transistor inputs of the NE5532, on the other hand, draw input current and are not the same as the JFET inputs of the TL072, which have no input current. This may be the case with low frequency filters. If you want to reopen this topic Feb 12, 2007 · When used in a buffer application I think the TL072 sounds more laid back, perhaps a tad too smooth. But that does not say anything about the SQ. You'll have to try it out and listen. Also, a poorest replacement in an emergency case are bipolar Mc/LM1458, or LM358. Measurements For this testing, I thought any important difference would show up in THD+N (distortion + noise) versus frequency as this is what the data sheet for op-amps emphasizes a lot. Apr 26, 2014 · TL072: 1T (= 1000000000k or 1 billion k) Input bias current: NE5532: 200nA = 200000pA TL072: 65pA So, the 5532 has input impedance 3 million times lower, and bias current about 3000 times higher, than 072. Hi there probaly a simple question maybe not. Mar 30, 2012 · 2012-03-30 8:38 pm. I'd suggest a bipolar - like NE5532. Im gone use only the lowpass unit on the filter but build it as a complete filter. Both, It is a simple design that I builded many times. Of course I got the thing working with TL072 and all is running fine at the moment. Tom The OPA134, OPA2134, and OPA4134 (OPAx134) series are ultra-low distortion, low-noise operational amplifiers fully specified for audio applications. 3 mA per op-amp section, which is almost twice that of the TL072. Aug 24, 2011 · The OPA2134 does not show phase reversal anywhere in the common-mode range, which immediately marks it as superior to the TL072. A Nov 10, 2006 · Should point out that in the late 70's, early 80's, the pukka Broadcast Desk makers, Calrec, Neve, SSL used TL072 when low current (compared to 5532) was needed rather than HiZ. 79 in single units. The OPA2134 and OPA604 Op-Amps. Has anyone had any problems using these as generic drop-in Mar 19, 2014 · TL072 VS NE5532. Does anyone have any personal experience with fake or suspect OPA2134's? OPA2134 data sheet, product information and support Mar 19, 2020 · 특히나 Burr-Brown 의 OPA2134 / OPA2604 같은 경우 개당 0. For one of the OP amp it's optimal with 1k and for the other one it's 2k. Take a look at ebay - you should now be able to spot these fake duds just from looking at the pictures. You have been banned from this forum. Mar 5, 2007 · Btw, my favorite Opamps are NE5532, MC33078, OPA2134 and if it really needs more I go for AD8022/8066, more power comes from AD8397. Has anyone had any problems using these as generic drop-in Nov 25, 2004 · i. Welcome to Perky's Analog Gear Demos. OPA2134 datasheet TLE2426 datasheet 10k/1k 8,2k/2k ( note: if gain x10 is wanted, change the 8,2k value to 20k ) Here's pinout for both OPA2134 and NE5532, if someone finding it interesting Here's TLE2426 Here's some good reading about Virtual Ground Circuits At last the two setup's in test ( picture ) Oct 8, 2001 · the opa2134 are actually cheap and maybe give some sonic differences, but I have read that even high-end brands use the ne5532 I am, gonna switch the opamps in my CD player soon with opa2134 (are reaaaaal low budget types) but I would like more to change the cap's to high-end types, their influence non-lineairuty is understandeble and evident, while the opamps only make a difference below Apr 19, 2024 · TL072: The TL072 is a dual JFET-input operational amplifier that provides performance similar to the OPA2134. But can not quite compare with TL071 regarding Value for Money. noise vs current draw. the TI's LME49860, LME49720. R. It was recently re-capped and all new guts put in . If anything, it has a more 'neutral' sound than the (possibly slightly euphonic) OPA2134, but its performance is very reliable and dependable and of a very high standard, which possibly explains its long standing use in 'professional' audio gear. TL072 is another well-known operational amplifier that is frequently compared to the NE5532 in order to determine which is quieter. And it is a JFET opamp, which is always preferred by myself in the positions where slightly higher voltage noise of the opamp is negligible, like here. I can't speak for the audio path necessarily because I didn't spend a lot of time doing A/B tests, but there was absolutely a noticeable difference in several modules where the OPA was better than a TL072. In fact, dual OPA627 on Browndogs would have been something to consider as well. Although I am a fan of the OPA2134, I still have very considerable respect for the NE5532. The OPA134, OPA2134, and OPA4134 (OPAx134) series are ultra-low distortion, low-noise operational amplifiers fully specified for audio applications. It always makes me giggle when I think of the hundred or so 5532's a recording passed through before making it to any format and then someone says they sound like crap in this last piece of equipment on which they are listening. Same with the OPA627 though. When a FET is required, the OPA2134 is a better replacement for the TL072. Could anyone help me troubleshoot which part/cap might have brought this problem? Nov 26, 2012 · for good info on guitar pickups' electrical parameters: UIUC Physics 498POM Guitar Pickup Measurements I doubt there is a lot better noise performance possible with the hi R pot as source the TL072 input noise V ~ 16 kOhm equivalent ~ 3 dB noise figure at higher source Z the V noise of the op amp is even less important and the noise figure can at best only asymptotically approach 0 dB Oct 8, 2017 · I guess what puts me in a dilemma is that Burr Brown branding behind the well known OPA2134 vs. The OPA2134 sounds more precise and neutral. Part Number: OPA1656 Other Parts Discussed in Thread: OPA2134, OPA2604 The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. Mar 15, 2014 · Could very well be. Aug 24, 2018 · THD+N Ratio vs Measured Level / Inverting 6dB Gain / 100k load / 22. I don't like OPA2134 much, so something like AD8620 would have been another good comparison to Burson. Jul 22, 2022 · Op-Amps 4558 vs TL072 vs OPA2134 vs 5532 vs LM741 Nov 7, 2023 · He used the TL072CP for the filter, I have spoken to him and he say I may try the OPA2134 as they are also FET. 2. Thread starter WhiteRhino; Start date 2014-03-19 10:19 am; Status This old topic is closed. At something like $2 for the dual version its not as cheap as the TL072 but still affordable. Just yesterday I compared a couple of dual op amps in a modded TS808 circuit and in the end liked the TL072 and RC4558 the most. eexn ylnbco pcxj plftd znoqsxs pkghtd yruc wttmivn cmrwhpf acvcvcj