Voltage controlled oscillator utilizing threshold voltage contro

Details Voltage controlled oscillator utilizing threshold voltage contro Voltage controlled oscillator utilizing threshold voltage contro

1999-02-25

2000-10-17

Kinkead, Arnold

Oscillators

Ring oscillators

331177R, 331108C, 331175, 327264, H03B 502

Patent

active

061337994

ABSTRACT:
A voltage controlled ring oscillator (VCRO) that can operate at low voltage and provide a variable periodic output. A plurality of transistors form a ring oscillator and a selected transistor in the ring oscillator has a body which can float with respect to ground potential. The selected transistor has a threshold voltage which is controllable by a voltage applied to the transistor body. A control input is coupled to the transistor body such that the body of the transistor can be charged by the control input. Charging the body alters the threshold voltage of the transistor and thereby controls the oscillation frequency of the oscillator.

REFERENCES:
patent: 5172076 (1992-12-01), Brown
patent: 5208557 (1993-05-01), Kersh, III
patent: 5331295 (1994-07-01), Jelinek et al.
patent: 5461585 (1995-10-01), Chonan
patent: 5675293 (1997-10-01), Lee et al.
patent: 5677650 (1997-10-01), Kwasniewski et al.

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