This circuit generates rectangular signals from 2 Hz to 20 kHz using an operational amplifier. The circuit is from 1984 Radio Electronics. The power supply must be symmetrical.
The integrated circuit shown in the figure is nothing more than the LM386 sold by Radio Shack,...
Suggested by General Electric in a 1967 documentation, this circuit replaces the Thryraton tubes used at...
This low-power, low-supply voltage amplifier uses a preamplifier to achieve a high-gain...