Programmable signal amplitude control circuits

Details Programmable signal amplitude control circuits Programmable signal amplitude control circuits

1981-05-26

1983-11-08

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323297, 323354, G01R 2714, G05F 158

Patent

active

044145012

ABSTRACT:
A circuit, for providing a periodic signal of programmably controllable amplitude, includes an oscillator having a substantially constant amplitude signal of desired frequency and waveform at an output thereof connected to the input of a first programmable voltage divider having its output connected to one input of an operational amplifier. The remaining operational amplifier input is connected to the output thereof via a second programmable voltage divider used as a programmably controllable feedback network. The operational amplifier output signal amplitude may be controlled by external data signals to values less than, equal to, and greater than, the substantially constant oscillator waveform amplitude. Both computer and hard-wired circuitry for controlling the output signal are disclosed. An isolation-and-rectification network may be used to recover a D.C. voltage of programmably controlled amplitude.

REFERENCES:
patent: 3566252 (1971-02-01), Nercessian
patent: 4349777 (1982-09-01), Mitamura
patent: 4354159 (1982-10-01), Schorr et al.

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