Found in old documentation, this circuit uses a double gate MOSFET. The operating frequencies depend on the coil, and the indicator is a microammeter.
This circuit can be used in alarms, data links or áudio links using IR radiation. The circuit is...
This amplifier can amplify signals from 10 Hz to 17 MHz with more than 30 dB of gain. The circuit is...
This circuit, found in a publication from the 1970s, produces a 1 Hz sinusoidal signal....