Electricity: power supply or regulation systems – External or operator controlled – Using a three or more terminal semiconductive device as the...
Patent
1983-05-12
1984-03-06
Wong, Peter S.
Electricity: power supply or regulation systems
External or operator controlled
Using a three or more terminal semiconductive device as the...
323268, 330263, G05B 2402
Patent
active
044356790
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: 3651333 (1972-03-01), Goldberg et al.
patent: 3697862 (1972-10-01), Taylor
patent: 3835390 (1974-09-01), de Sae Silva
patent: 4196381 (1980-04-01), Standing
patent: 4218638 (1980-08-01), Breithaupt
Bedard James F.
Eichelberger Charles W.
Nati, Jr. Salvatore F.
General Electric Company
Herkamp Nathan D.
Schlamp Philip L.
Wong Peter S.
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