This high impedance step suggested by an English publication can operate up to 1 MHz with 1 V rms output. Input impedance is 1 M ohm.
This single pulse generator, loss detector, or peak detector was found in an old General Electric...
This stage of IF to 455 kHz operates with voltages from 1.5 V. We find it in a 90s Popular...
The circuit used is the 4093 configured as an inverter in this application from Radio Electronics from...