Voltage controlled oscillator (VCO) employing nested oscillating

Details Voltage controlled oscillator (VCO) employing nested oscillating Voltage controlled oscillator (VCO) employing nested oscillating

1977-09-12

1978-08-08

Grimm, Siegfried H.

Oscillators

Ring oscillators

331108D, 331111, 331135, 331143, 331177R, H03B 304, H03B 524, H03K 3282

Patent

active

041059506

ABSTRACT:
The VCO is comprised of first and second "nested" oscillating loops. The first loop includes M cascaded inverters interconnected to normally oscillate at a given fixed frequency. The second loop includes N cascaded inverters where the input of the first of the N inverters is connected to the output of one of the M inverters and where the output of the Nth inverter is coupled to the output of a different one of the M inverters, whereby at least one of the M inverters is common to the two loops, and where M and N are integers. A control voltage is coupled to at least one of the N inverters to vary its conductivity and cause the frequency of oscillation of the two loops to change.

REFERENCES:
patent: 3676801 (1972-07-01), Musa
patent: 3863179 (1975-01-01), Goo
patent: 3878482 (1975-04-01), Schowe, Jr.
patent: 3904988 (1975-09-01), Hsiao
patent: 3931588 (1976-01-01), Gehweiler

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