Method and apparatus for reduced noise band switching circuits

Details Method and apparatus for reduced noise band switching circuits Method and apparatus for reduced noise band switching circuits

2007-01-23

2007-01-23

Kinkead, Arnold (Department: 2817)

Oscillators

With particular source of power or bias voltage

C331S03600C, C331S17700V, C331S17700V, C331S034000

Reexamination Certificate

active

11018846

ABSTRACT:
A low-phase noise voltage control oscillator (VCO) comprising a voltage source for supplying control voltage to the VCO core; a phase lock loop, having an output connected to an input of the voltage source; a VCO core, including an amplifier circuit with noiseless biasing and a tank circuit with noiseless biasing of the varactors; having an output connected to an input of the phase lock loop; and an attenuator, located between the voltage source and the VCO core, for reducing phase noise from the voltage source to the VCO core.

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Joseph, Alvin J., et al., Product Applications and Technology Directions With SiGe BiCMOS, IEEE Journal of Solid-State Circuits, vol. 38, No. 9, Sep. 2003, pp. 1471-1478.
Curtin, Mike, et al., Phase-Locked Loops for High-Frequency Receivers and Transmitters-Part 2, Analog Dialogue 33-5, pp. 1-5.

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