The circuit transistors, found in a 1974 documentation, may be the BC548. The circuit is used in quadriphonic systems to combine signals.
This circuit was obtained from an English publication from 1977. The integrated circuit is a...
This 22 V symmetrical amplifier provides close to 15 W of output in the bridged configuration. Integrated...
In the circuit in the figure, when a pulse of light falls on the LDR, the circuit arms with the...