Quadrature voltage controlled oscillator with automated...

Details Quadrature voltage controlled oscillator with automated... Quadrature voltage controlled oscillator with automated...

2005-05-20

2009-08-11

Kinkead, Arnold (Department: 2817)

Oscillators

Polyphase output

C331S074000, C327S148000, C327S254000, C375S345000, C375S324000, C455S260000

Reexamination Certificate

active

07573338

ABSTRACT:
A quadrature voltage controlled oscillator includes oscillation circuits for generating in-phase and quadrature-phase oscillation signals that are used to generate in-phase and quadrature-phase output signals. A compensation circuit adjusts biasing in the oscillation circuits depending on a phase relationship between the in-phase and quadrature-phase output signals to automatically control the phase relationship between the oscillation signals.

REFERENCES:
patent: 5418497 (1995-05-01), Martin
patent: 6456167 (2002-09-01), Huang
patent: 6462626 (2002-10-01), Gharpurey
patent: 6549082 (2003-04-01), Ipek et al.
Japanese Patent Publication No. 2000-138530 to Ranjit, having Publication date of May 16, 2000 (w/ English Abstract page).
Japanese Patent Publication No. 02-279004 to Nobukazu et al., having Publication date of Nov. 15, 1990 (w/ English Abstract page).
Korean Patent Publication No. 100201815 to Park, having Publication date of Mar. 16, 1999 (w/ English Abstract page).

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