Questions tagged [single-supply-op-amp]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0
votes
2answers
51 views

opamp with single power supply

I'm trying to build a 'panner' to mix two audio signals, basically a dry/wet potentiometer for an audio effect. It works as intended when I use a dual power supply like this: But stops working when I ...
-3
votes
1answer
72 views

opamp dc comparator [closed]

simulate this circuit – Schematic created using CircuitLab I am trying to compare the voltages of the inverting and non-inverting terminal but no matter what input I put in, the voltages seem to ...
0
votes
2answers
36 views

OP2177 opamp with single supply

Does anyone know if I can use "OP2177" with a single supply without a negative voltage on V- ?
0
votes
1answer
39 views

Any reason why the MIC920 op amp should not be used in SINGLE SUPPLY mode?

I understand that practically any op amp can be used in single-supply mode as long as the application (interface, measurement, etc) does not require dual-supply for specific reasons. Is there a ...
0
votes
2answers
47 views

Balanced Audio Line Driver Off Single Supply

I am working on a device that needs a balanced audio line driver that can convert an unbalanced signal to balanced and drive a balanced cable run between devices. I am looking at schematics using ...
0
votes
1answer
68 views

How to prevent single rail ampliier power-on pop sound?

I would like to build a 9V battery powered microphone pre-amplifier and I'm encountering a design problem which I don't know how to solve: I have an opamp that serves as main amplifier which is ...
3
votes
3answers
702 views

How to implement gain and offset in a single opamp?

I tried designer here in this page. But my particular case (Case 2) seems not working in the page. Then I Read this document and my case there, is section 4. But my calculation results are not ...
0
votes
2answers
117 views

Sine wave signal at resonant frequency gets distorted

I am currently at lost on what I need to do to solve my problem. I have a sine wave signal as my input, and the output is sine wave as well. At resonant frequency, the output of the signal gets high. ...
0
votes
2answers
75 views

What are the advantages and disadvantages of a Darlington pair? [closed]

Can the BJT transistors in a Darlington pair be of different types?What are the advantages and disadvantages of a Darlington pair? Is such a circuit able to generate power by itself?
0
votes
1answer
47 views

Internally compensated opamp for 5V/V or more

I am using opamp for some signal conditioning circuit. I want to use opamp as voltage follower. It is mentioned in the Opamp datasheet that opamp is internallly compensated for 5/5V, 10V/V, or more ...
0
votes
2answers
39 views

Different voltages for Single and Dual-supply (INA)

Since it doesn't matter for the Op. Amp. itself, the components presented as "single-supply" commonly relate to rail-to-rail input/output devices, which operate on lower total voltage ...
0
votes
1answer
53 views

Measuring Voltage from Photodiode with OpAmp

I am trying to measure the voltage coming out from my OpAmp after connecting it to my Photodiode. As a Photodiode I am using the BPW34S from Vishay and the Op Amp is the AD822ANZ from Analog Devices. ...
3
votes
1answer
190 views

Help figuring out an op amp circuit with two loudspeaker outputs

I have to design a circuit that amplifies a sine wave with either a AD8616 or a LTC6256 (currently using the AD8616) to a 50 ohm loudspeaker and a rated power of 0.5 W. I'm a novice when it comes to ...
1
vote
1answer
123 views

Analog input to ATMEGA328P using op-amp - how does this circuit work?

I was looking for a good solution in order to use a bunch of components and read 0-10V/0-20mA and digital inputs using my Arduino Pro Mini (ATMEGA328P working at 3.3V.) I've found online this ...
2
votes
1answer
71 views

Designing a current sense circuit to measure a wide range of resistances and noise considerations

I have an application in which I have to design a current sense circuit in order to measures the resistance of a load resistor that can have values between 200kohms and 60ohms. The input voltage of ...
1
vote
1answer
78 views

OpAmp/Comparator for AC current detector circuit

I am trying to complete schematic for current detector. This is addition on How to build AC current sensor circuit for ESP-01 GPIO. By googling and researching I came with following schematic which I ...
0
votes
0answers
59 views

Having noise problem designing a stereo amplifier with TDA2030

So, I have successfully made a mono TDA2030 amplifier using a single-power-supply which worked flawlessly without any noise. But when I tried to design a stereo circuit with 2 TDA 2030 ICs, both of ...
0
votes
3answers
80 views

Biasing an inverting Op-Amp using a voltage regulator

When biasing an inverting op-amp input using a voltage regulator (say, L7805), at the non-inverting pin, can we use the same regulator to power other ICs or should we only use it on the op-amp? Also, ...
0
votes
0answers
50 views

Analog current sensor design help needed

I have been thinking for some time about a circuit. I have been a digital designer for most of my career, and have recently begun studying analog again, and find it a welcome challenge. I am trying ...
0
votes
0answers
26 views

Power Dissipation in Subtractor Op-amp Circuit

How much power can be assumed to be dissipated through the resistors of an op-amp configured as a subtractor like the one below? Theoretically, a very very small current should pass, but I don't know ...
0
votes
3answers
90 views

OpAmp with slightly negative supply for ADC input

I would like to discuss a design idea around the supply of OpAmps that drive a ADC cannels of a microcontroller or DSP. Let the ADC be supplied by 3.3V and 0V ("analog" supplies separated ...
1
vote
2answers
87 views

How to find input impedance for this op amp?

The simulation gives an output voltage of 1.427V and Av of 10. Based on the equation Av= -R2/Ri, Ri should be 7kΩ. However, when I calculate the total impedance using R3+(R1//R4), the impedance is ...
0
votes
1answer
57 views

Power an TL064CN OpAmp from USB?

I want to get into electronics and I am interested in creating oscillator circuits. In one experiment I wanted to use an Opamp for an oscillator and I am now stuck with the power requirements of it. I ...
4
votes
2answers
92 views

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 ...
3
votes
1answer
106 views

Need help with an IR demodulation circuit

I'm trying to reverse engineer a PCB and made a schematic. The bad thing is I only have PCB images from both sides, not the actual PCB. This PCB is used to detect a very small black object spinning at ...
0
votes
1answer
185 views

Dual-supply to Single-supply op-amp conversion

I'm building an op-amp circuit that takes my electric guitar signal shifts the voltage from -1.5V to 1.5V to a 0-3V. I have this circuit that works perfectly with a dual supply op amp in multisim, but ...
1
vote
1answer
50 views

Differentiator Op-Amp Circuit not giving correct output using single power rail

Im trying to simulate an differentiator Op-Amp using a single supply and the LM324 opamp. I built the differentiator circuit using a voltage divider and the LM3234 opamp. The input wave is a ...
2
votes
1answer
45 views

Inverting Amplifier Circuit using Single Power Rail

For my homework, we are supposed to simulate an inverting and noninverting amplifier using a single supply and the LM324 opamp. I built the inverting amplifier using a voltage divider, but my output ...
1
vote
2answers
287 views

Op amp controlled LED current

I'm trying to implement a simple current control circuit for an LED from here: https://www.allaboutcircuits.com/technical-articles/the-basics-behind-constant-current-led-drive-circuitry/ The ...
1
vote
1answer
80 views

MCP6001 op-amp unable to drive LED when configured as inverting buffer?

I built this circuit on breadboard and came across a problem: I'm using the MCP6001 op-amp with a single supply, configured as an inverting buffer. That's why I connected the non-inverting input to a ...
2
votes
1answer
66 views

Noise generated in 2nd stage of active bandpass filter

I'm breadboarding a two-stage inverting amp/filter to amplify a radar signal, using the TLV2464 opamp. My first stage has a gain of 45dB, the second stage 35dB. The input will be a radar signal which ...
0
votes
1answer
81 views

Texas Instruments fully differential op amp app note: I'm having difficulty understanding an equation (single ended to differential video conversion)

I am developing a circuit to convert single-ended video to differential, based around the TI article "Converting single-ended video to differential video in single-supply systems" by Jim ...
1
vote
2answers
109 views

LM359 Quartz Crystal Oscillator Schematic not working

I'm trying to design a Crystal Oscillator based on the LM359 chip and the schematic on the datasheet but it's not working. It does not do anything. What I'm doing wrong? I changed some components ...
0
votes
2answers
88 views

Low cost op-amp with Common-mode input voltage range of 1.125V

I'm developing a project where an op-amp is configured to bring a input voltage difference ranging from 1.8V to 3V to a output voltage ranging from 3V to 5V. The output of the op-amp will be fed into ...
0
votes
1answer
400 views

Op-amp astable multivibrator with single supply

I want to create a simple circuit to flash a LED with one op-amp. I already simulated the circuit (astable multivibrator) but there is one problem with the supply. I don't know what to change so that ...
0
votes
1answer
93 views

Attenuating mid-supply biased audio signal before AC coupled audio amplifier

The context here is simple volume control of a DAC generated audio signal with a potentiometer before an audio amplifier stage in a single supply, battery powered system. Is there any advantage to ...
1
vote
2answers
338 views

Floating Differential measurement?

Can I simply hook up an opamp inputs, (either using a differential or in-amp topology that is/are also powered from a floating power supply), across a device under test that itself has exceeding ...
0
votes
3answers
52 views

Reasons for constraining single-ended Op-Amp VCC when multiple power rails available

If I am utilising an op-amp, say a LM321/LM324, say in single-supply operation as a buffer and have a multiple suitable power rails available then are there, assuming I do not expect to utilise the ...
2
votes
1answer
138 views

LED blinking using LM358 operational amplifier

As an exercise in getting more familiar with op-amps, I have built this blinking LED circuit: With the values above the circuit works fine on the breadboard, and in the Falstad simulator: Simulation ...
0
votes
0answers
33 views

Diff Op-Amp in current measurement ignores input [duplicate]

I'm working on a small project which involves current measurement. I'm using R10 to measure Voltage drop (100 mV) when 10 mA current goes through it. Next I'm amplifing that signal around 37 times ...
0
votes
1answer
35 views

What is the cause of the error/unexpected outcome in water temperature control heating system circuit?

Here is the circuit with components I built as shown over here. The title of the circuit is water temperature controlled system. The function of this system is to control the heating while sensing the ...
0
votes
1answer
95 views

Attenuating op-amp circuit with offset

I am designing a non-inverting op-amp circuit that maps an input signal (V3) 0-3.3V to an output signal (Vo) 0.2-2.4V. I opted to offset the output up by 0.2V and then used a second op-amp circuit as ...
0
votes
2answers
61 views

variation in source votlage is allowed in a constant current circuit?

Reference question: understanding constant current source circuit With respect to the linked question, I am seeing a variation in the load current as I change the voltage \$V_2\$ to and fro from \$...
0
votes
1answer
55 views

High voltage non-inverting operational amplifier for DC signal

I am currently using LT6090 with Vcc=140 and Vee=0 for DC signal amplification with gain of 31 in non-inverting mode. For an input signal of 0-4V from a DAC the output measured is 0-124V (step change ...
0
votes
2answers
367 views

Unexpected output voltage in opamp (LM741, DC, single supply) circuit [duplicate]

As a beginner I tried to make a simple DC circuit with an opamp on a single supply. This is what I came up with: simulate this circuit – Schematic created using CircuitLab I use R3 and R4 as a ...
1
vote
1answer
87 views

Op Amp Voltage follower

I built a simple non inverting op amp amplifier with 2 resistors and a TS972IN powered between 0-5V but my output was always set to 5V. I tried several others Op Amp, others resitors and I also moved ...
0
votes
1answer
210 views

Current Transformer noise in idle state

[ *Violet is the bias voltage. Yellow is the CT output. You can see it drifting from bias volt a little. * I want to build a power measurement circuit using STM32F407. I am using LM324N opamp for the ...
0
votes
0answers
303 views

VCA on 5V powersupply

I've made a VCO and ADSR-generator with two Arduinos. The VCO uses a DAC made with a resistor ladder, the ADSR-gen uses a 12bit DAC. Everything is 5V powered (USB charger of 1A). In my search for a ...
0
votes
2answers
84 views

Help getting the transfer function of a circuit

I have been trying to get the transfer function of the circuit below for some days now and I eventually get to an expression but I don't believe I am geting the correct expression and here's why (the ...
0
votes
0answers
69 views

Single Supply Op Amp, (With AC?)

Hey guys, I'm trying to understand how to use op amps, right now I just have a battery hooked up to the non-inverting, and a virtual ground, this is a single supply cause I don't have many tools to ...