Low power quadrature voltage controlled oscillator using...

Oscillators – Solid state active element oscillator – Transistors

Reexamination Certificate

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Details

C331S167000

Reexamination Certificate

active

07145409

ABSTRACT:
Disclosed is a quadrature VCO (voltage controlled oscillator) which comprises a first delay cell including a first switching transistor and a second switching transistor, the first delay cell outputting first and second in-phase signals with different phases; and a second delay cell including a third switching transistor and a fourth switching transistor, the second delay cell outputting first and second quadrature-phase signals with different phases. The first and second quadrature-phase signals are applied to back gates of the first and second switching transistors, and the first and second in-phase signals are applied to back gates of the fourth and third switching transistors.

REFERENCES:
patent: 6317008 (2001-11-01), Gabara
patent: 6456167 (2002-09-01), Huang
patent: 6583675 (2003-06-01), Gomez
patent: 6650195 (2003-11-01), Brunn et al.
patent: 6667668 (2003-12-01), Henrion
patent: 6867656 (2005-03-01), Hajimiri et al.
patent: 6906596 (2005-06-01), Kitamura et al.
patent: 2001-345637 (2001-12-01), None
patent: 2002-208819 (2002-07-01), None

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