20Pcs JRC4558D JRC 4558D DIP8 OPAMP OP AMPS CHIP IC Good Quality
Brand NewTop Rated PlusBuy It NowFrom China893 Sold893 Sold- Brand NewTop Rated Plusor Best OfferFrom China42 Sold42 Sold
10pcs NJM4558L JRC4558L SIP-8 IC
Brand NewFrom ChinaWas: Previous Price$4.30Free International Shipping10% off100PCS JRC4558D JRC 4558D DIP8 OPAMP OP AMPS CHIP IC
Brand NewFrom ChinaBuy It Now5 pcs New TJM4558CDT C4558 ST SOP8 ic chip
Brand NewFrom Chinaor Best Offer100PCS NJM4558MD NJM4558D JRC4558D 4558D SOP-8 IC
Brand NewFrom ChinaBuy It NowBrand NewFrom United StatesBuy It NowCustoms services and international tracking provided10% offBrand NewFrom United StatesWas: Previous Price$4.96Free International ShippingBrand NewFrom ChinaWas: Previous Price$4.13+$0.90 shipping50PCS IC JRC4558D 4558D DIP8 OP AMP DIP8 NEW DATE CODE
Brand NewFrom ChinaBuy It Now2pc JRC4558DD 4558DD OPAMP OP AMPS IC's CHIP's NEW (A102)
Brand NewFrom ChinaBuy It Now20PCS NJM4558MD NJM4558D JRC4558D 4558D SOP-8 IC
Brand NewFrom ChinaBuy It Now48 Sold48 Sold10pcs NJM4558L JRC4558L SIP-8 IC
Brand NewFrom ChinaBuy It NowDual General Purpose Operational Amplifier RC4558DRG4 SOIC-8 Op Amp IC Low Power
Brand NewFrom ChinaBuy It Now100PCS IC JRC4558D 4558D DIP8 OP AMP DIP8 NEW DATE CODE
Brand NewFrom ChinaBuy It Now10PCS NJM4558M SOP-8 IC
Brand NewFrom ChinaBuy It NowBrand NewFrom ChinaBuy It NowNew – Open boxFrom Israelor Best Offer50PCS DUAL OP AMP IC JRC SOP-8W ( DMP-8 ) NJM4558M NJM4558 JRC4558 4558
Brand NewFrom ChinaBuy It Now100PCS 4558D NJM4558D JRC4558D DIP-8 IC
Brand NewFrom ChinaBuy It Now100PCS IC JRC4558D 4558D DIP8 OP AMP DIP8 NEW
Brand NewFrom Chinaor Best Offer1PCS NEW JRC NJM4558SD JRC4558SD 4558SD SIP-9 DUAL OPERATIONAL AMPLIFIER IC
Brand NewFrom Chinaor Best Offer10PCS OP AMP IC KEC DIP-8 KIA4558P KIA4558 4558P
Brand NewFrom ChinaBuy It Now5PCS Original JRC NJM4558L JRC4558L 4558L SIP-8 DUAL OPERATIONAL AMPLIFIER IC
Brand NewFrom Chinaor Best Offer3pcs 4S58 45S8 455B 4558 NJM4558M SOP8 IC Chip
Brand NewFrom Chinaor Best Offer50PCS IC JRC4558D 4558D DIP8 OP AMP DIP8 NEW
Brand NewFrom Chinaor Best Offer5 pcs New CD4558 SOP-8 ic chip
Brand NewFrom Chinaor Best Offer50PCS JRC4558D JRC 4558D DIP8 OPAMP OP AMPS CHIP IC
Brand NewTop Rated PlusBuy It NowFrom Hong Kong1PCS NJM4558SD SIP9 IC
Brand NewFrom ChinaWas: Previous Price$6.05Free International Shipping5PCS RAYTHEON RC4558N RC4558 DIP-8 OP AMP IC
Brand NewFrom Chinaor Best Offer100pcs JRC4558D 4558 SOP-8 Operational Amplifier Chip IC Large Chip SMD
Brand NewFrom ChinaWas: Previous Price$4.69+$0.90 shipping5 pcs New CD4558 SOP-8 ic chip
Brand NewFrom Chinaor Best Offer5PCS JRC 4558DX Professional IC chip electronic components
New – Open boxFrom ChinaWas: Previous Price$3.90Free International Shipping1PCS RC4558T Professional IC chip electronic components
New – Open boxFrom ChinaWas: Previous Price$3.33Free International ShippingRC4558P TEXAS INSTRUMENTS IC OPAMP GP 3MHZ 8 PIN DIP
Brand NewFrom United Statesor Best Offer5 PCS New NJM4558D 4558D JRC DIP-8 ic chip
Brand NewFrom Chinaor Best Offer100PCS 4558D NJM4558D JRC4558D DIP-8 IC original JRC
Brand NewFrom ChinaBuy It NowBrand NewFrom CanadaWas: Previous Price$4.67Free International ShippingBrand NewFrom ChinaWas: Previous Price$8.50Free International ShippingActive6 years, 7 months ago$begingroup$I've spent hours reading on buffers, non-inverting amplifiers and inverting amplifiers. I get the concept (though I don't understand all the formulas) and I can't make a simple voltage-follower out of a RC4558 Dual general-purpose op-amp.Here's what I'm working with:1V peak-to-peak sine wave @ 1kHz from a frequency generator output (50 ohms)RC4558
Pin 1 - Output
Pin 2 - Inverting Input
Pin 3 - Non-inverting Input
Pin 4 - Ground
Pin 5 - NC
Pin 6 - NC
Pin 7 - NC
Pin 8 - +12 VDCSignal directly connected to the Non-inverting Input. Output feedback is connected to the Inverting Input.The output wave is 300mV, squarish / pulsating wave.What am I doing wrong?Anindo Ghosh46.9k88 gold badges8989 silver badges174174 bronze badgesuser18966user18966$endgroup$2 Answers
$begingroup$Yes, of course you can use RC4558 op-amps for line-level audio. They have been used over the past 30 something years in lots of low end gear. They work, but the quality isn't very good: poor noise and distortion figures, poor driving ability of loads in the less than 10K range. Use something better like an LM4562 or the inexpensive and good NE5532.It's not a great idea to leave unused devices unconnected. Connect the output to the inverting input, and convert the noninverting input to your V/2 voltage reference (or the ground in a proper dual-voltage circuit).From your description of the circuit, you are omitting important biasing details. Since you are working with a single power supply between 0 and 12V. The center voltage is at 6V. That is to say, when there is no signal, you want the output of the op-amp to be approximately 6V. This means that the non-inverting input will have to be at 6V.The easiest way to do that is to bias that input to 6V with some resistors, and then couple the signal with a capacitor, so that the signal's AC swings are superimposed on the 6V bias.Legend:- R1, R2 and C1 create a 'phantom ground' reference voltage. The point between R1 and R2 is at 6V DC. Capacitor C1 ensures that this point has a low impedance to ground for AC signals, and also helps to reduce power supply noise at this phantom ground.
- R3 conveys the 6V phantom ground to the + input. Because it is a 10K resistor, it establishes a 10K input impedance (common for line level audio). R3 also has another important role: it provides a path for an input bias current to flow into or out of the + input. Without this resistor, the only path is through the capacitor C2, which blocks direct current.
- C2 couples the input signal to the + input, superimposing it on the 6V DC. The 5uF value is chosen so that it cleanly passes 20 Hz and up when combined with the 10K input impedance. Try to use a film capacitor. If you raise the input impedance, you can lower the capacitance. E.g. for a 100K input impedance, you'd need only a 0.5 uF capacitor for the same frequency response.
- C3 couples the output signal to the next output stage. This output coupling cap can usually be omitted. If the next device needs one, it supplies it.
- R4 and R5 are DC return resistors. If the previous or next device is DC coupled and sources a small current, these resistors complete the circuit for that current. Because otherwise your input and output are open circuits with respect to DC, due to the coupling capacitors. These resistors can usually be omitted, since most devices take care of their own currents internally. You certainly do not need R4 if the C3 coupler is omitted, because the output stage of the op-amp is a low impedance voltage source (sink for current).
- The unused U1B is connected as described earlier. The phantom ground is conveyed to its + input, and it is in feedback.
Note: when constructing such a device, do not route the jack sleeve connections to a ground trace on the circuit board, even though the circuit suggests that. That creates a 'pin 1 problem'. The jacks should be grounded directly to the power supply (or if there is a conducting chassis, to the metal chassis, which is then grounded). If there is radio-frequency interference picked up by the cable shields, this approach prevents routing it to the circuit board where it will easily find its way where it isn't supposed to.KazKaz17.6k11 gold badge3030 silver badges7373 bronze badges$endgroup$$begingroup$From the limited information in the question, one likely issue is that the input signal is not biased to within the common mode input voltage range of the op-amp. This would cause the output to be driven to the ground rail, and only noise or such peaks as reach the operating range, will show up on the output.Also, this op-amp is not designed to tolerate inputs down to Ground or below, hence operating without such biasing could compromise the op-amp.A voltage follower such as below should work for you. I have also added a 5 KHz cut-off RC filter at the output, as a safeguard in case high frequency noise shows up in the output.(The not-quite-straight lines are due to it being rather late here)The 0.1 uF decoupling capacitor showin in the schematic needs to be physically as close to the power and ground pins of the op-amp as possible.Also, the uncommitted op-amp cannot be left floating as I have done: This app-note from Maxim provides some insights into both the why and the how of dealing with unused op-amps in a package.Anindo GhoshAnindo Ghosh46.9k88 gold badges8989 silver badges174174 bronze badges$endgroup$Not the answer you're looking for? Browse other questions tagged operational-amplifierbuffer or ask your own question.
- Blog
- New Page
- Microsoft Office 2011 Mac Free
- Manual Book Ht Vev-v8 Plus
- Netsupport School 12
- Toyota Engine Block Numbers
- Acdsee Ultimate 10 Keygen
- Hunter X Hunter Phantom Rouge 720p Vostfr
- Inva Mula Youtube
- Ic 4558 How Works
- Dell Latitude D505 Windows 98 Drivers
- Idm Crack Download
- Free Sage Accounting Software Download
- Voice Recognition For Mac
- Numark Mixdeck Express Driver Download
- Download Propellerhead Reason 5 Mac Download Reason 5 For Mac
- Nesco Roast Air Oven Manual
- Dil Roye Ya Ilahi Mp3 Download Skull
- Stata 11 Download
- The Room Puzzle Game Walkthrough
- Serato Rane Ttm 57sl Drivers
- Corsair K55 Firmware Update
- Edit Group Outlook 2010
- Neax 2000 Ips Matworx Download
- InfiStar Antihack For DayZ Mods
- Oxenfree game review gamespot
- Atomic blonde torrent 1080p
- Total audio converter full
- Analog to digital converter types
- Avengers full movie 2012 utlocker
- Saving templates fl studio mac alpha
- Madhubala ek ishq ek junoon 460
- Changeling the lost 2nd edition fae touched
- Alesis multimix 4 usb fx popping
- Can you make gifs from copy protected dvds