Dual frequency voltage controlled oscillator circuit

Details Dual frequency voltage controlled oscillator circuit Dual frequency voltage controlled oscillator circuit

2005-01-11

2005-01-11

Nguyen, Minh (Department: 2816)

Oscillators

Solid state active element oscillator

Transistors

C331S17700V

Reexamination Certificate

active

06842081

ABSTRACT:
An oscillator for generating a fundamental frequency signal and harmonic signal to provide multiple radio frequency signals. First and second bipolar transistors are differentially connected, and have base and collector terminals cross-coupled. A pair of inductors serially connect the collectors of the transistors to one terminal of a d.c. power supply source. A current source connects to the other terminal of the d.c. power supply source and to the emitters of the differentially connected transistor. A tuning capacitor connected between collector terminals establishes a resonant frequency for the oscillator. Crosscoupling is affected at a level that produces harmonic signals which can be used along with a fundamental frequency signal in numerous radio telecommunications applications.

REFERENCES:
patent: 5231361 (1993-07-01), Smith et al.
patent: 5629652 (1997-05-01), Weiss
patent: 6046647 (2000-04-01), Nelson
patent: 6127900 (2000-10-01), Laub et al.
patent: 6137372 (2000-10-01), Welland
patent: 6147567 (2000-11-01), Welland et al.
patent: 6150891 (2000-11-01), Welland et al.
patent: 6445257 (2002-09-01), Cox et al.
patent: 6469587 (2002-10-01), Scoggins
patent: 6545555 (2003-04-01), Justice et al.
A Filtering Technique To Lower LC Oscillator Phase Noise, IEEE Journal of Solid-State Circuits, Emad Hegazi et al. vol. 36, No. 12, Dec. 2001 pp. 1921-1930.
Tail Current Noise Suppression In RF CMOS VCOs IEEE Journal of Solid-State Circuits, Pietro Andreani et al. vol. 37, No. 3, Mar. 2002, pp. 342-348.
A Low Phase Noise Monolithic VCO In SiGe BiCMOS, IEEE Radio Frequency Integrated Circuits Symposium, Jean-Marc Mourant et al. 2000, pp. 65-68.

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