This circuit uses a CMOS integrated circuit as a basic element and can be combined with the previous circuits. The circuit is from a Radio Electronics from May 1990.
This circuit provides a signal that is twice the frequency of the input signal. The circuit was...
This unusual amplifier configuration is from 1986. The circuit has a high resting current given the...
This circuit is from an 80's American documentation. The circuit uses components of the time which...