The circuit presented was suggested by Texas Instruments in an opto-electronics manual. The transistor can be the BC548 and the supply voltage depends on the application.
This circuit can be used to listen for SSB signals on receivers that do not have the built-in...
This configuration was found in Raytheon's circuit manual from the 1960s. The circuit has an...
Tem The CMOS oscillator illustrated in the figure has a frequency that depends on the temperature sensor, a...