JFETs (junction field-effect transistors) can make low-noise high-impedance amplifiers that are better than any other technology. Like all things analog, they are not the best for everything, but you ...
1. This circuit uses a JFET to bootstrap the cathode of the photodiode. It eliminates the effect of diode resistance and capacitance. This improves bandwidth and reduces noise, but puts a dc voltage ...
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