transimpedance amplifier

I'm using LTC6268-10 to build a ~200MHz TIA (Transimpedance amplifier) Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/626810f.pdf Here is the schematic: The frequency response I get: I expect the bandwidth to only roll off at 250MHz, why does it fall to -3dB...

The schematic shows 2 transimpedance amplifier circuits on the first stage, for reference and sample photodiodes. The outputs are then connected to sallen-key butterworth circuits for low pass filtering. The output of these 2 are then connected to a differential amplifier to obtain its...

I found this circuit in notes of an older college. Can somebody please explain me why this additional diode is used? What exactly do feedback resistors 100kOhm and 3Mohm do? What is the purpose of bjt transistor? As you can see I understand very little about this circuit. Notes said that circuit...

Hi everyone, I'm building low power 600w grid following inverter. Scheme is standard with DC-link capacitor at 400v, full bridge H-bridge with 4 power mosfets and LCL filter. LCL filter is designed to filter high switching harmonics. Switching frequency of mosfets is 30kHz and I'm using unipolar...

Hello fellow electronics enthusiasts, I'm seeking some advice regarding an issue I've encountered with an electromagnetic wave emitter. Despite covering the photodiodes, I'm still detecting a signal at the same excitation frequency as the LEDs. The emitter and receiver circuit are show here...

edit: I'm trying to study about a transimpedance amplifier (TIA). I'm using LTC6268-10 op-amp configured as TIA. I'm using it to get power readings from a 1310nm photodiode, which I'm reverse biasing it in TIA. Datasheet of op-amp I'm using: link...

Hi Forum, I am currently looking at improving the existing Photodiode circuitry to measure light at low levels (close to 0.01 Lux).I can understand the complexities of measuring light at these levels, however this is not what I am after. Initially the design used an OSD15-5T Photodiode. Now, I...