100mW Amplifier C (CB23600E)

This amplifier circuit was found in a Radio Electronics from April 1959. The circuit needs only 20 mV to provide maximum output power.

Peak indicator with hysteresis (CB21973E)
The basis of this circuit is a CA3130 operational amplifier. The transistor can be BC548, and the...
60 Hz Rectangular Signals (CB10687E)
This circuit was found in a 1963 publication. Its purpose is to convert sinusoidal signals from...
Peak voltmeter (CB7370E)
With this circuit found in a 1965 Electronic Design, it is possible to read a peak voltage of up to...