Interleaved VCO with body voltage frequency range control

Details Interleaved VCO with body voltage frequency range control Interleaved VCO with body voltage frequency range control

2006-02-21

2006-02-21

Chang, Joseph (Department: 2817)

Oscillators

Ring oscillators

C331S045000

Reexamination Certificate

active

07002420

ABSTRACT:
An interleaved VCO is configured using a ring oscillator with voltage controlled feedforward inverting stages coupled around the inverting stages making up the basic ring oscillator to enable the frequency of the ring oscillator to be voltage controlled. The feedforward inverting stages comprise a complementary inverter stage and a voltage controlled transfer gate. Complementary control voltages are coupled to the gates of the complementary transfer gate FET devices. Likewise, the complementary control voltages are coupled to the corresponding body of the FET devices in the transfer gate and in the inverting stage. The complementary control voltages may also be connected to the body of the complementary FET devices in the inverting stages making up the basic ring oscillator. This allows the frequency range of the VCO to be extended without having to switch the feedforward paths into an out of the circuit.

REFERENCES:
patent: 4517532 (1985-05-01), Neidorff
patent: 5434525 (1995-07-01), Leonowich
patent: 5668505 (1997-09-01), Vu et al.
patent: 5912591 (1999-06-01), Yamada
patent: 6133799 (2000-10-01), Favors, Jr. et al.
patent: 6353369 (2002-03-01), Boerstler
patent: 2003/0071691 (2003-04-01), Boerstler et al.

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