Discrete amplitude calibration of oscillators in frequency...

Details Discrete amplitude calibration of oscillators in frequency... Discrete amplitude calibration of oscillators in frequency...

2006-05-18

2009-08-04

Vuong, Quochien B (Department: 2618)

Telecommunications

Transmitter and receiver at same station

With frequency stabilization

C455S075000, C455S260000, C331S182000

Reexamination Certificate

active

07570925

ABSTRACT:
In one embodiment, this disclosure describes a frequency synthesizer for use in a wireless communication device, or similar device that requires precision frequency synthesis but small amounts of noise. In particular, the frequency synthesizer may include a phase locked loop (PLL) and an integrated voltage controlled oscillator (VCO). The frequency synthesizer may implement one or more amplitude calibration techniques prior to enabling the PLL. For example, an amplitude calibration unit may be used to selectively activate switched unit current sources within a tail current source of the VCO. In this manner, the amplitude the signal generated by the oscillator can be adjusted without requiring closed-loop amplitude monitoring or control.

REFERENCES:
patent: 4926141 (1990-05-01), Herold et al.
patent: 5079522 (1992-01-01), Owen et al.
patent: 5262957 (1993-11-01), Hearn
patent: 5382922 (1995-01-01), Gersbach et al.
patent: 5446411 (1995-08-01), Horsfall et al.
patent: 5572168 (1996-11-01), Kasturia
patent: 5625325 (1997-04-01), Rotzoll et al.
patent: 5701598 (1997-12-01), Atkinson
patent: 5748047 (1998-05-01), Guthrie et al.
patent: 5767748 (1998-06-01), Nakao
patent: 5809400 (1998-09-01), Abramsky et al.
patent: 5828266 (1998-10-01), Couet
patent: 5870001 (1999-02-01), Osterling et al.
patent: 5909645 (1999-06-01), Abramsky et al.
patent: 5999062 (1999-12-01), Gilbert
patent: 6008703 (1999-12-01), Perrott et al.
patent: 6029055 (2000-02-01), Nobusawa
patent: 6163228 (2000-12-01), Pope
patent: 6167245 (2000-12-01), Welland et al.
patent: 6172579 (2001-01-01), Dacus et al.
patent: 6175282 (2001-01-01), Yasuda
patent: 6211747 (2001-04-01), Trichet et al.
patent: 6233441 (2001-05-01), Welland
patent: 6292507 (2001-09-01), Hardin et al.
patent: 6323736 (2001-11-01), Jansson
patent: 6369647 (2002-04-01), Main et al.
patent: 6370361 (2002-04-01), Hung et al.
patent: 6388536 (2002-05-01), Welland
patent: 6424230 (2002-07-01), Kocaman et al.
patent: 6466096 (2002-10-01), DeVito
patent: 6483391 (2002-11-01), Magoon et al.
patent: 6653908 (2003-11-01), Jones
patent: 6661291 (2003-12-01), Jovenin
patent: 6680655 (2004-01-01), Rogers
patent: 6760575 (2004-07-01), Welland
patent: 7062229 (2006-06-01), Dunworth et al.
patent: 7103127 (2006-09-01), Damgaard et al.
patent: 2001/0009391 (2001-07-01), Kawada et al.
patent: 2002/0075080 (2002-06-01), Nelson et al.
patent: 2002/0163396 (2002-11-01), Lim et al.
patent: 2003/0011437 (2003-01-01), Ozawa
patent: 2003/0025566 (2003-02-01), Rogers
patent: 2003/0119467 (2003-06-01), Welland et al.
patent: 2003/0171104 (2003-09-01), Van Rumpt
patent: 2003/0171105 (2003-09-01), Dunworth et al.
patent: 2003/0171106 (2003-09-01), DunWorth et al.
patent: 2003/0186666 (2003-10-01), Sindhushayana
patent: 8102664 (1996-04-01), None
patent: 2000049597 (2000-02-01), None
patent: 2001156633 (2001-06-01), None
Margarit, et al., “A Low-Noise, Low-Power VCO with Automatic Amplitude Control for Wireless Applications,” IEEE Journal of Solid-State Circuits, vol. 34, No. 6, Jun. 1999, pp. 761-771.

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