This circuit was found in a 1968 General Electric documentation. It has an input impedance of 2 M ohms and excites a load of 16 ohms. The integrated circuit of the time is the PA237.
This circuit is suitable for SSB modulation and was obtained from an amateur radio documentation from...
The components of this circuit are from the time of its publication in the 1980s. Modern...
This doorbell or buzzer as announced in a 1990s US publication uses an operational amplifier that admits...