Voltage controlled oscillator

Details Voltage controlled oscillator Voltage controlled oscillator

1977-11-11

1979-03-27

Kominski, John

Oscillators

Solid state active element oscillator

Transistors

331108D, H03K 3282

Patent

active

041468490

ABSTRACT:
A voltage controlled oscillator includes three stages of CMOS inverters arranged in cascade connection. The output of the final stage inverter is connected to the input of the first stage inverter. A capacitor is connected between the input and output of any one of the inverters. The inverter with the capacitor connected thereto comprises two MOS FETs of opposite channel types and is connected in series between high and low voltage sources by control MOS FETs of the same channel types as the respective MOS FETs of the inverter. The gates of the control MOS FETs are connected to control terminals to govern the frequency of the oscillator and one additional fine tune MOS FET is connected across each of control MOS FETs to provide fine tuning of the oscillator.

REFERENCES:
patent: 3878482 (1975-04-01), Schowe, Jr.
patent: 3904988 (1975-09-01), Hsiao
patent: 4072910 (1978-02-01), Dingwall

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