Quadrature LC voltage controlled oscillator with opposed...

Details Quadrature LC voltage controlled oscillator with opposed... Quadrature LC voltage controlled oscillator with opposed...

2006-08-03

2008-03-11

Mis, David (Department: 2817)

Oscillators

Polyphase output

C331S048000, C331S055000, C331S1170FE, C331S17700V, C331S185000

Reexamination Certificate

active

07342462

ABSTRACT:
A voltage controlled oscillator unit is provided with cross coupled voltage controlled oscillators to generate quadrature phases. One control stage adjusts coupling between the oscillators. Another control stage adjusts the tail current that applies operating bias to the oscillators and to the couplers, respectively. The cross coupling and tail current control stages are arranged so that tuning one simultaneously and oppositely tunes the other for simultaneous adjustment in opposite directions. This limits the power consumption of the oscillator unit throughout the range of frequency control.

REFERENCES:
patent: 6417740 (2002-07-01), Anh et al.
patent: 6462626 (2002-10-01), Gharpurey
patent: 7146140 (2006-12-01), Ravi et al.
patent: 2002/0093385 (2002-07-01), Nishiyama et al.
Madala; “Design of Wide-Band VCO using Mixed Tuning Technique”. Dept. of Comp. Sci. and Elec.; Mälardalen Univ., Våsterås, Sweden.
Aparicio et al.; “A CMOS Differential Noise-Shifting Colpitts VCO”. ISSCC 2002.
Hajimiri et al.; “Design Issues in CMOS Differential LC Oscillators”. IEEE Jnl of Solid State Circuits, vol. 34, No. 5 (1999).
Song et al.; “A 5GHz Transformer-Coupled CMOS VCO Using Bias-Level Shifting Technique”. IEEE (2004).
Andreani et al.; “Tail Current Noise Suppression in RF CMOS VCOs”. IEEE (2002).
Zhan et al.; A Comparative Study of Common MOS VCO Topologies; Cornell Univ. Ithaca, NY.

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