This circuit is from the Texas Instruments operating amplifier manual. Any operational can be used and the font need not be symmetrical. Rf and Rg determine the gain of the circuit.
The width of the pulses produced by the oscillator in the figure is determined by the value of R1,...
The figure below shows an AC transconductance amplifier with the National Semiconductor LM3900. The...
In this 1974 circuit, the Triac fires when the neon lamp reaches its ionization voltage of around 85...