Wireless communication terminal and voltage controlled...

Details Wireless communication terminal and voltage controlled... Wireless communication terminal and voltage controlled...

2006-12-05

2006-12-05

Pascal, Robert (Department: 2817)

Oscillators

With frequency adjusting means

With voltage sensitive capacitor

C331S03600C, C331S1170FE, C331S167000

Reexamination Certificate

active

07145410

ABSTRACT:
A wireless communication unit (100) comprises a voltage controlled oscillator (123) having an active device (450) operably coupled to a first variable capacitance (425) to provide a variable capacitance value based on an applied steering line voltage, and a feedback network comprising a resonator (475), operably coupled to an output of the active device, for feeding power back to an input of the active device to sustain oscillations (123). Notably, a second variable capacitance is operably coupled to receive a control voltage from the steering line (405) and located between the resonator (475) and the active device (450).

REFERENCES:
patent: 4939481 (1990-07-01), DaSilva
patent: 5942950 (1999-08-01), Merenda
patent: 5987331 (1999-11-01), Grube et al.
patent: 6075421 (2000-06-01), Chong
patent: 6218909 (2001-04-01), Eban
patent: 6906596 (2005-06-01), Kitamura et al.
patent: 100065444 (1998-03-01), None
patent: WO 02/09269 (2002-01-01), None

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