This is the typical audio amplifier for a 1967 television. We found it in a magazine from the time. Note the use of the output transformer and the high supply voltage. The circuit is an RCA CTC21.
This circuit is from the 1983 Intersil Databook. The circuit has an A / D converter for display of 4 and...
We found this circuit in Linear Technology Applications of 1997. The circuit uses common...
Found in a 90's EDN, this circuit generates signals in the frequency range given by the graph. The...