Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [transimpedance-amplifier]

A current to voltage amplifier, usually implemented with operational amplifiers. Use in conjunction with the "operational-amplifier" tag if your question is about a transimpedance amplifier (TIA) implemented using an op amp.

A current to voltage amplifier, usually implemented with operational amplifiers. Use in conjunction with if your question is about a transimpedance amplifier (TIA) implemented using an op amp.

See Wikipedia's article on transimpedance amplifiers for more information.

16 questions
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Why would a photodiode with an op-amp be very linear?

I read here mentioned The configuration in Figure 1a creates a very linear response in terms of the irradiance of the light source. Would this configuration of photodiode not be linear? Why? The model of photodiode model should be following…
curlywei
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Virtual ground not close to ground in a current to voltage converter

I was hoping to get some feedback on a circuit I'm building. The schematic is as follows: Some description: This circuit essentially functions as a constant AC voltage source with current booster capability followed by a subcircuit to measure the…
summeriok
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1 answer

Ways to get around amplification limited by op amp GBW?

I'm working on a project that requires me to amplify 70 pA to read out at 10 V (the digitizer I'm using to collect data has a range of 0 to 10 V readout). On top of this, I need to sample my voltage at either 2.5 MHz or 5 MHz. I'm greatly limited by…
Winston Wilhere
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1 answer

What limits amplification of transimpedance amplifier?

I'm designing a transimpedance amplifier but I'm having trouble getting higher gain. I started with Rf being 16.5 kOhms but then I realized I will need higher gain, so I simply switched it out for 50 kOhm, 100 kOhm, and 1 Mohm, but after the 50 kOhm…
OnHai
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APD current limit or decreasing the di/dt

I'm trying to design a TIA circuit with APD to detect the light pulse, and a large dynamic range is required. I have several channels on one board and I found there are some crosstalk on the nearby channel when detecting large signals: Since I need…
FNJU
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3 answers

Transimpedance Amplifier Output Range with SiPM

I'm designing a transimpedance amplifier for a SiPM (Silicon Photo Multiplier Array Broadcom AFBR-S4N44C013) sensor. I want the output voltage to range between 0 and 3.2 V max so I can input it into an Arduino. I'm using a 36 V bias voltage from a…
truncatingtelescopes
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Right transimpedence amplifier choice for input range

I have a device that produces a ±30 nA signal and I'd like to measure this to a 0.1 nA precision. Since the currents are so low and I don't have much time to make mistakes, I am planning to use a TIA embedded in an evaluation board. Will this do the…
JoVi
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1 answer

Photodiode and Transimpedance amplifier

I am building a transimpedance amplifier that is connected to a photodiode. (I want to measure the light from a laser). I build one using the opamp LM324N. But it is not working as a TIA amplifier. I checked the photodiode against a resistor, to…
Teena
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How to Place the AC-coupling capacitance and resistance in a TIA circuit

I am planning to use OPA858 as the Transimpedance Amplifier for the following TIA circuit. C2， R8 are to AC couple the circuit: In the data sheet of OPA858, it recommends using this layout with Riso in order to reduce the resonance between the trace…
Wu Eric
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Putting a RC filter after the photo-diode to AC-couple the TIA gain stage

I have been designing a photo-diode circuit which separates out DC and AC signal of the photodiode. I am using MAX4007 as the current mirror for the DC branch and I am using OPA858 as the Transimpedance amplifier. However, due to the limited dynamic…
Wu Eric
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What is the right way to avoid crosstalk of different analog channels?

I'm designning a board including three channels of light pulse detection, each channel contains TIA and FDA: During test, I found large pulse on one channel will cause some crosstalk on other two channles. Adding metal sheilding between each…
FNJU
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SiPM transimpedance amplifier design

I'm designing a transimpedance amplifier for a SiPM (Silicon Photo Multiplier Array Broadcom AFBR-S4N44C013) sensor. Basically I want the output to be 3.2 V max. so I can input it into an Arduino, with output voltages dropping as the brightness…
Charlieglider
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Schematics of photodiode BPW34 interfacing with an ADC ESP32

I am designing a circuit that uses a BPW34 photodiode for visible light communication. The transmission distance is about 5-6 m, and the transmission frequency is only about 1-10 kHz. I have consulted this circuit and don't know how accurate it…
Shu
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1 answer

LTSpice multiple input source noise analysis

In my schematic, I have two input differential current source and I want to simulate the output noise of the system. However, the LTSpice noise simulation only allows me to put one input source in the simulation command. Is there any way to simulate…
livecf
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Visible light communication using photodiode receiver

I am designing a receiver circuit using photodiode with visible light communication application, analog signal I read with ADC of esp8266. The circuit below is my design with a TIA and amplifier. Is there a bug? I want to catch the light with 1-7…
Shu
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