Found in American documentation from 1968, this circuit has an acute cut-off of the frequency to which it is tuned and which depends on RC. Transistors may be modern equivalents of general use.
PWM is the abbreviation for Pulse Width Modulation. What is done in this circuit is to apply...
Found in a 1964 Electrronic Design, this circuit is intended to control analog video signals. The...
This circuit makes use of a PLL 567 and the components must be calculated according to the desired...