This circuit is from a 2004 documentation serving for signals from 1 MHz to 160 MHz. The antenna is of the telescopic type and the analog instrument is of the type found in old sound equipment.
The gain of this circuit at 1 kHz [and 40 dB falling rapidly when the frequency deviates from this...
We found this circuit in a Radio Electronics magazine from November 1976. The clock frequency is...
This circuit is from an 80's documentation, applying to ordinary comparators. The source does not...