Hello everyone, I am a student who has been working on a low noise preamplifier for a high impedance current source. I have put the model of the detection circuit here:
- How does the Cin of the JFETs effect the signal to noise. do i have to match the input capacitance of the JFETs to the source capacitance for minimum noise? How about if i put multiple JFETs in parallel to reduce input voltage noise - do i have to revise my JFETs selection in terms of input capacitance?
- While evaluating the performance of the designed amplifier can i neglect the equivalent input current noise, as i am using the JFETs?
- Are there any good review articles or texts for low noise preamplifier design (for capacitive sensors). Please help! thanks
-arch