Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [single-supply-op-amp]

For questions about op amps that are marketed as capable of "single supply" operation. While all op amps can be operated with a single supply, op amps that are marketed as capable of "single supply" operation typically include an input common mode range and output voltage swing down to the negative supply voltage. Always use with the "operational-amplifier" tag.

For questions about op amps that are marketed as capable of "single supply" operation. While all op amps can be operated with a single supply, op amps that are marketed as capable of "single supply" operation typically include an input common mode range and output voltage swing down to the negative supply voltage. This allows the op amp to be powered with a single supply connected to its power pins, with the negative supply terminal connected to signal ground.

Always use with .

211 questions
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What is causing the distortion in the negative cycle of this push-pull speaker driver?

I'm trying to build a unity-gain push-pull output stage to drive a small ~8 Ω speaker (measured DC resistance is 7 Ω; I don't have a datasheet for it). This is for use with a single rail battery supply, so for the op-amp I've chosen an LM324. For…
mountainmad
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Need clarification regarding op-amp's ground/ reference and common mode dependence on supply

I am confused about several aspects pertaining to op-amp DC biasing and its effects on ground/common mode limits. The more I read about this, the more muddled up I get. I will try to frame my queries as coherently as possible and would really…
needbrainscratched
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Why isn't this opamp working correctly?

I am working on an adjustable current source. In a thread awhile back, various circuits were discussed: simple adjustable current source for LED string ... but as I have settled on one option, and it's not working correctly, I'm starting a new…
RustyShackleford
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Single-Supply OpAmp design

I am trying to come up with an amplifier that can amplify an input audio signal about 4-5 times. This is my first time designing an amplifier, so please bear with me. The circuit must operate on a single +5V supply, what I have at the moment is an…
SukkoPera
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Current sense amplifier + op-amp buffer + ADC: Measuring down to 0 with a single supply

I'm thinking about current sensing with a high dynamic range (10 mA - 20 A) and using LTC6102 as a high-side current sense amp (the voltage would be 54.6 V max, a 13S6P Li-ion battery). The ADC I'm planning to use is LTC1407 (12-bit 1.5 MS/s). I am…
axk
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Single-supply non-inverting op-amp for summing DC voltages at unity gain

Is it possible to use this single supply, non-inverting, summing op-amp configuration to sum multiple arbitrary DC voltages at unity gain? I've used the inverting summing op-amp config on bipolar power supplies to sum AC and DC input voltages…
robobozo
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Single supply non-inverting amplifier using op amp

I'm working on building a distortion guitar effect pedal for an analog electronics class I'm taking. I am struggling with building an amplifying circuit using an op amp (we just began learning about them), and I'm hoping I could get some tips.…
Orange Soda7988
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What might be causing an op amp to fail in a voltage follower circuit?

I have the following super simple op amp circuit that makes use of the AZV321 single op amp (https://www.diodes.com/assets/Datasheets/AZV321.pdf) in order to balance the voltage on a pair of supercapacitors in series. The op amp and capacitors are…
Jason K.
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Opamp with unbalanced rails

I'm using this - opamp. I'm powering the MCP6V81 off +0.5V and -5.0V supplies. So the supplies are very unbalanced. Will this cause us any issues? Such as output offset, and drift? Also, in the absolute maximum voltage rating, it is mentioned as…
user220456
4
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2 answers

How to lower input resistance of buffer (unity-gain) op-amp?

A practical op-amp connected in a unity gain configuration will have a very high input resistance (mega-ohms or higher). How can I add an external resistor to modify the input resistance to the kilo-ohm range (while keeping the output resistance…
Hani908
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TL072P Opamp behaviour

After noticing a strange behaviour from a TL072P Opamp in a circuit I was building, I decided to test my stock, coming from two different batches, side to side. I am getting confusing results when feeding them both with a 4V p/p sine wave with a 2V…
brunobhr
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Op-Amp Voltage Follower not working at "extreme" voltages

I was testing the AD712 on LTSpice with a simple voltage follower. In a perfect world, I'd get this. Instead, I'm getting this. Now, I am aware that op-amps do not reach their V+ and V- voltage and usually fall a bit before that limit. However,…
HFOrangefish
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Unused Opamp Termination: How does it cause increased current consumption?

Usually the following configuration for unused opamps is said to be troublesome, even for rail-to-rail input & output (RRIO) opamps. Nevertheless, it is attractive because it requires no additional components. simulate this circuit – Schematic…
tobalt
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Need help with IR Transmitter circuit

I'm working on IR transmitter circuit. But R77 feedback resistor creating confusion about its working. I know it's acting as a current limiter to the LEDs but confused about its role in feedback. Can anyone explain the working of this this circuit?
mastermind
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Strange opamp's output impedance in spice

I'm simulating this circuit in Micro-Cap, which is the clipping stage of a guitar effect. The opamp model is the "NE-5532" I want to measure the input and the output impedance. I expected an output impedance closer to zero Ohm, and an input…
RawCode
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