Electrical Engineering

Do common-source JFET amplifiers have an advantage over common-drain? The JFET would be in a low noise photodiode amplifier. The signal is 100us pulses with 10us raise times.

Here are the schematics which I have in mind.
The op-amp would be LTC6252 or LT6200. Single-supply operation is desirable for me.

Common-drain

I picked up this common-drain idea from the LT6200 datasheet (application example on the first page).

Common-drain JFET has a prototyping appeal, because it would be easy to try a simple transimpedance op-amp (without a JFET) on the same PCB. Fallback position.

Common-source

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Comments on Choosing between common-drain JFET amplifier, and common-source

Choosing between common-drain JFET amplifier, and common-source

Common-drain

Common-source

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