The configuration shown allows to obtain a high voltage gain for FETs. FETs can be BF245 or MPF102. The circuit is from the 1977 National Semiconductor FET Databook.
This circuit from the 70's used germanium transistors and operated in the range of medium and...
Found in a 1965 Electronic Design, this circuit produces a signal with the waveform shown in the...
Unlike the previous detector circuit, this includes the inverter not requiring a high voltage...