Current-controlled oscillator

Details Current-controlled oscillator Current-controlled oscillator

2007-11-13

2007-11-13

Pascal, Robert (Department: 2817)

Oscillators

Ring oscillators

C331S10800D, C331S176000, C331S17700V

Reexamination Certificate

active

10537029

ABSTRACT:
The present invention provides a current controlled oscillator comprising a first section providing a first differential output and a second section providing a second differential output. A loading structure comprised of resistive and reactive elements electrically connects the first differential output with the second differential output. The resistive and reactive elements have values chosen such that the resistive elements substantially extend the linear operating frequency range of the current controlled oscillator. Transistors of the loading structure have which are tied to a power supply rejection ratio compensation section for compensating for variations in power supply voltage.

REFERENCES:
patent: 4519086 (1985-05-01), Hull et al.
patent: 5206609 (1993-04-01), Mijuskovic
patent: 5420547 (1995-05-01), Kikuchi
patent: 5600280 (1997-02-01), Zhang
patent: 5799051 (1998-08-01), Leung et al.
patent: 6633202 (2003-10-01), Yang et al.
Maneatis, “Low-Jitter Proces-Independent DLL and PLL Based on Self-Biased Techniques”, IEEE Journal of Solid-State Circuits, vol. 31, No. 11, Nov. 1996, pp. 1723-1732, (10 pages).
Chan et al., “A 622-MHz Interpolating Ring VCO with Temperature Compensation and Jitter Analysis”, IEEE International Symposium on Circuits and Systems, Jun. 1997, Hong Kong, pp. 25-28, (4 pages).

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