Questions tagged [offset]

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675 views

Two-stage opamp offset voltage constraint

I have a question regarding the systematic offset voltage constraint for designing two-stage opamp. My question is : Why must Id6 equal Id7 for offset voltage constraint ? Please find below the ...
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1answer
339 views

Bias current and offset voltage, op-amp 741 DC imperfections [closed]

Can the effect of the bias current counterbalance the effect of offset voltage? I am asking this question because today in a lab it occurred to a couple of groups. Is there a reason for that?
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2answers
328 views

signal conditioning 0 to (-40) volt to 0-5 volt, arduino

I want to convert my 0 to (-40 )v signal to be 0-5 volt so that i can measure it using arduino, i want to attenuate the signal first by the factor of 8 and then shift it up by the arduino 5 volt. ...
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1answer
881 views

Amplifier Gain and Offset (Positive m and Negative b)

My question is regarding gain and offset of an amplifier. simulate this circuit – Schematic created using CircuitLab I've used various references however I believe the circuit I want to build ...
2
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0answers
352 views

High voltage DC offset servo

I'm working on a project and I need some assistance. I have an audio tube amplifier output stage that I need to have adjustable operating points while maintaining a DC null at the output. [![enter ...
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5answers
334 views

Opamp non idealities

Why is the offset voltage present on the non inverting terminal? What would happen on placing it on inverting terminal?
2
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1answer
285 views

Does input offset voltage for amplifiers remain almost same

In Op-amp datasheets, input offset voltages are specified. Does this input offset voltage remain same (no significant difference) for each IC or can it change significantly each time I use the device? ...
2
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1answer
256 views

How to deal with the opamp input offset in a circuit with multiple opamps with inputs connected together?

My question is somewhat similar to this one asked here before. I have the following circuit: simulate this circuit – Schematic created using CircuitLab The input signal is being fed to two (...
1
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1answer
2k views

How calculate the input offset current effect on measured voltage?

Here is the data-sheet: http://www.mccdaq.com/pdfs/manuals/PCI-DAS6034-35-36.pdf A data-acquisition board's differential amplifier measures a constant voltage across a resistor R1 shown in the Figure ...
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2answers
357 views

A confusion about error components in a data acquisition system

My question is related to my previous question:Accuracy of a data acquisition hardware In a data acquisition system absolute accuracy is defined as measure of all error sources as following: Abs. ...
1
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1answer
691 views

How to compensate for op-amp offset voltage for AC current?

For simulation purposes, I know that one can setup a difference amplifier configuration and compensate for offsets for DC current by adding a voltage source on the inverting input, and adjusting it's ...
1
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1answer
565 views

Preamplifier before latch stage in comparator circuit

Adding preamplifier based on simple inverter before latch stage can improve performance of comparator by decreasing offset voltage. Can anybody explain me how it works? Best Regards
1
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1answer
383 views

What is the best method to compensating offset at the output of a peak detector circuit?

Brief of Application: The signal conditioning circuit developed is used to detect or capture the peak values of dynamic systems such as the impulse tools. In this application, we use an impulse tool ...
1
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2answers
954 views

Piezo into 0-5v ADC, with offset center voltage?

I want my piezos to have a center voltage at 2.5v for a 0-5v ADC input on Atmega328, so it can sense force in both ways - one way would be >2.5v and the other will be <2.5v. Will this circuit work?...
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2answers
895 views

Gain and offset adjustment with voltage reference?

I am building an instrument that relies on a precision sensor module. The sensor is factory-calibrated, and outputs 0-10Vdc. I believe the factory calibration to be better than anything I can attain, ...
5
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1answer
563 views

If op-amp offset trims are provided, but not needed, what is the best practise for connecting them?

I'm using op-amps with offset trims available, but not needed as they already have very low offset voltage. What is the best practise for the PCB pad connections - should they simply be left floating? ...
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1answer
6k views

Offset an input voltage of -2.5V - 2.5V to 0V - 5V? [duplicate]

I have a circuit input which provides a voltage range of negative 2.5 volts to positive 2.5 volts. How do I change this so the output voltage is 0 - 5 volts? simulate this circuit – Schematic ...
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3answers
890 views

The best way to trim a wheatstone bridge digitally?

I am building a Wheatstone bridge for strain gauge measurement. Due to component deviations a wheatstone bridge will often show an offset which needs to be trimmed: If we assume that we're using 5% ...
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1answer
1k views

How to offset input voltage of any op amp

There are some op amps that allow nulling of input offset voltage by provding decidcated inputs where, typically, a potentiometer is connected for the offset correction. My question is that if a op ...
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1answer
160 views

Does my op amp need offset nulling?

I have built a photodiode circuit using AD712 (precision bifet) and the circuit is working as expected. I have added a programmable gain using a multiplexer which lets me choose a gain from 1 to 100 ...
0
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2answers
127 views

voltage range of ac signal

I have an ac signal in the range of 1.5v-10v and it needs to be shifted down by 0.5v so it is in the range of 1v-9.5v. How can i do this exactly? assuming it uses a single power supply. any help ...
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3answers
3k views

Can someone explain this gain & offset op-amp circuit?

I'm having trouble understanding the circuit in the photo below. I know that it's a gain and offset amp designed to convert 0-2.5 V range to +/-10 V range (hence it has a gain of 8 and an offset of -...
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2answers
1k views

Filtering DC offset of a pulse train

How can I filter a DC offset of a pulse train with an RC circuit? The signal is a pulse jumping between 3.07V and 3.53V. But I need a pulse which is jumping between 0V to 0.5V. How can I filter that ...