Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2006-10-24
2010-02-23
Nguyen, Long (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S538000, C327S543000
Reexamination Certificate
active
07667533
ABSTRACT:
A system and method for voltage controlled oscillator (VCO) biasing in low voltage circuits including low resistance elements that are especially susceptible to noise. In one embodiment, a poly resistor and triode resistor is used to cancel or offset the effects that temperature variations have on the circuit. The triode resistor is powered by a voltage source that uses a pair of diodes coupled to a constant transconductance (gm) circuit to generate a reduced noise voltage that is independent of the power supply noise. The size of the triode resistor and poly resistors can be varied.
REFERENCES:
patent: 5399960 (1995-03-01), Gross
patent: 6381491 (2002-04-01), Maile et al.
patent: 6831503 (2004-12-01), La Rosa
patent: 7227401 (2007-06-01), Zhang et al.
patent: 2004/0239413 (2004-12-01), Gubbins
Song Yonghua
Tan Chun-Geik
Tsang Randy
Marvell International Ltd.
Nguyen Long
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