Oscillators – Electromechanical resonator – Crystal
Reexamination Certificate
2006-05-16
2006-05-16
Kinkead, Arnold (Department: 2817)
Oscillators
Electromechanical resonator
Crystal
C331S03600C, C331S179000, C331S034000, C331S016000
Reexamination Certificate
active
07046098
ABSTRACT:
An all-digital frequency synthesizer architecture is built around a digitally controlled oscillator (DCO) that is tuned in response to a digital tuning word (OTW). In exemplary embodiments: (1) a gain characteristic (KDCO) of the digitally controlled oscillator can be determined by observing a digital control word before and after a known change (Δfmax) in the oscillating frequency; and (2) a portion (TUNE_TF) of the tuning word can be dithered (1202), and the resultant dithered portion(dkTF)can then be applied to a control input of switchable devices within the digitally controlled oscillator.
REFERENCES:
patent: 4573026 (1986-02-01), Curtis et al.
patent: 5036294 (1991-07-01), McCaslin
patent: 5162746 (1992-11-01), Ghoshal
patent: 5202685 (1993-04-01), Nagata
patent: 5325399 (1994-06-01), Haspeslagh et al.
patent: 5345233 (1994-09-01), Nagata et al.
patent: 5581253 (1996-12-01), Brown
patent: 5585801 (1996-12-01), Thurston
patent: 5625325 (1997-04-01), Rotzoll et al.
patent: 6240127 (2001-05-01), Happonen
patent: 6249238 (2001-06-01), Steinlechner
patent: 6275177 (2001-08-01), Ho et al.
patent: 6313775 (2001-11-01), Lindfors et al.
patent: 6658748 (2003-12-01), Leipold et al.
patent: 0 423 841 (1991-04-01), None
patent: 0 823 700 (1998-02-01), None
patent: 2 337 884 (1999-12-01), None
patent: WO 01/18637 (2001-03-01), None
“All-Digital Frequency Synthesis with Non-Linear Differential Term for handling Frequency Perturbations”, U.S. Appl. No. 10/306,655, Filed on Nov. 27, 2002.
“All-Digital Frequency Synthesis with DCO Gain Calculation”, U.S. Appl. No. 10/302,029, Filed on Nov. 22, 2002.
“Digital Phase-Domain PLL Frequency Synthesizer”, U.S. Appl. No. 09/603,023, Filed on Jun. 26, 2000.
“Digital Fractional Phase Detector”, U.S. Appl. No. 09/608,317, Filed on Jun. 30, 2000.
“Digitally-Controlled L-C Oscillator”, U.S. Appl. No. 09/679,793, Filed on Oct. 5, 2000.
Brady III Wade James
Kinkead Arnold
Neerings Ronald O.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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