Unilateral coupling for a quadrature voltage controlled...

Details Unilateral coupling for a quadrature voltage controlled... Unilateral coupling for a quadrature voltage controlled...

2005-03-22

2005-03-22

Kinkead, Arnold (Department: 2817)

Oscillators

Plural oscillators

C331S048000, C331S050000, C331S1170FE, C331S1170FE, C331S167000, C331S002000, C331S17700V

Reexamination Certificate

active

06870432

ABSTRACT:
According to some embodiments, unilateral coupling is provided for a quadrature voltage controlled oscillator. For example, a first voltage controlled oscillator may be provided with a 0 degree phase node and a 180 degree phase node A second voltage controlled oscillator may be provided with a 90 degree phase node and a 270 degree phase node. In addition, the first and second voltage controlled oscillators may be mutually coupled with substantially unilateral cascaded common-source common-gate amplifier coupling devices to create a quadrature voltage controlled oscillator.

REFERENCES:
patent: 6323736 (2001-11-01), Jansson
patent: 6608527 (2003-08-01), Moloudi et al.

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