The response of relay amplifiers with feedback
E. John Gibson, B. Franz Tuteur · Transactions of the American Institute of Electrical Engineers Part II Applications and Industry · 1957
THE SIMPLICITY and economy of on-off controllers has led to their wide control system application in industry. It is possible to employ the on-off controller principle in the design of a power amplifier that is simple and rugged. The use of such a device will be restricted to the operation of loads that incorporate a smoothing or low-pass effect in their response.