This RF amplifier step has a dynamic range of 140 dB and can amplify signals from 0.5 to 40 MHz. FET is old, but modern equivalents can be used.
In this circuit, D.A. which is actually O. A. of an operational amplifier, which can be any type...
A narrow range of frequencies around 1 kHz is rejected by the high Q filter shown in the figure,...
This circuit, which uses a planar silicon sensor, is from a 1964 Electronic Design. The component...