Found in older Signetics documentation, this circuit generates signals from 30 Hz to 25 kHz. Operational amplifiers are from the time, as is the matching pair of transistors.
This circuit for powers up to 240 W was found in a 1967 RCA SCR manual. The SCR must be in...
Frequency divisions up to 18,384 can be performed with the basic configuration of a 4020 as shown...
In the figure we have a circuit in which the second tone recognizer remains disabled until the...