Oscillators – Solid state active element oscillator – Transistors
Reexamination Certificate
2007-06-12
2007-06-12
Nuton, My-Trang (Department: 2816)
Oscillators
Solid state active element oscillator
Transistors
Reexamination Certificate
active
10189128
ABSTRACT:
A differential circuit includes first and second side circuits which are coupled to receive control signals in such a way as to introduce an intentional imbalance in the differential circuit for certain benefits discussed herein. An exemplary pseudo-differential LC tank circuit is described which includes first and second side nodes, and an inductance circuit and a variable capacitance circuit coupled between the nodes. The inductance and variable capacitance circuits may be broken out into separate tanks to achieve certain magnetic noise reduction benefits. Each exemplary variable capacitance circuit includes a first variable capacitance coupled between the first side node and a common ground node, and a second variable capacitance coupled between the second side node and the common ground. Each of the first and second variable capacitances is coupled to receive control lines for controlling the capacitance of the first and second variable capacitance circuits in a pseudo-differential manner. Each variable capacitance includes at least one of many types of switch-capacitor cells, some of which are described herein.
REFERENCES:
patent: 4169251 (1979-09-01), Laakmann
patent: 4584544 (1986-04-01), Hettiger
patent: 5187450 (1993-02-01), Wagner et al.
patent: 5451915 (1995-09-01), Katzin et al.
patent: 5486796 (1996-01-01), Ishikawa et al.
patent: 5561398 (1996-10-01), Rasmussen
patent: 5564100 (1996-10-01), Huang et al.
patent: 5708394 (1998-01-01), Karlquist
patent: 5805016 (1998-09-01), Jiang
patent: 5905414 (1999-05-01), Motoi
patent: 5929716 (1999-07-01), Komori et al.
patent: 5942950 (1999-08-01), Merenda
patent: 5952952 (1999-09-01), Choi et al.
patent: 5982228 (1999-11-01), Khorramabadi et al.
patent: 6009318 (1999-12-01), Freed
patent: 6013958 (2000-01-01), Aytur
patent: 6150891 (2000-11-01), Welland et al.
patent: 6268777 (2001-07-01), Welch
patent: 6268778 (2001-07-01), Mucke et al.
patent: 6281758 (2001-08-01), Elsayed et al.
patent: 6292065 (2001-09-01), Friedman et al.
patent: 6317008 (2001-11-01), Gabara
patent: 6323736 (2001-11-01), Jansson
patent: 6388532 (2002-05-01), Babcock
patent: 6469919 (2002-10-01), Bennett
patent: 6529015 (2003-03-01), Nonoyama et al.
patent: 6574288 (2003-06-01), Welland et al.
patent: 6583609 (2003-06-01), Pardoen
patent: 6600437 (2003-07-01), Confalonieri et al.
patent: 6646581 (2003-11-01), Huang
patent: 6753738 (2004-06-01), Baird
patent: 6760575 (2004-07-01), Welland
Nuton My-Trang
Silicon Laboratories Inc.
Zagorin O'Brien Graham LLP
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