PLL synthesizer having phase shifted control signals

Oscillators – Automatic frequency stabilization using a phase or frequency... – With reference oscillator or source

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331 1A, 331 8, 331 12, 331 16, 331 17, 331 36C, 331179, 327 9, 327 12, 327105, 327156, 327159, 455260, H03B 508, H03L 706, H03L 7087, H03L 7091, H03L 716

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061508918

ABSTRACT:
The synthesis of high-frequency signals, such as wireless communication signals, includes a phase-locked loop (PLL) frequency synthesizer with a variable capacitance voltage controlled oscillator (VCO) that has a discretely variable capacitance in conjunction with a continuously variable capacitance. The discretely variable capacitance may provide coarse tuning adjustment of the variable capacitance to compensate for capacitor and inductor tolerances and to adjust the output frequency to be near the desired frequency output. The continuously variable capacitance may provide a fine tuning adjustment of the variable capacitance to focus the output frequency to match precisely the desired frequency output. During fine tuning adjustment, the PLL may be controlled by a plurality of analog control signals. The analog control signals may be derived by first generating a plurality of phase shifted signals from a divided version of the VCO output clock by using a shift register. The shift register may be clocked by another clock signal at a higher frequency than the divided version of the VCO output clock. The phase differences between the plurality of phase shifted signals and a divided version of a reference clock may then be detected and converted to the analog control signals.

REFERENCES:
patent: 3538450 (1970-11-01), Andrea et al.
patent: 3571743 (1971-03-01), Menkes
patent: 3899746 (1975-08-01), Gammel
patent: 4009448 (1977-02-01), Hopwood et al.
patent: 4099137 (1978-07-01), Alm, Jr. et al.
patent: 4179670 (1979-12-01), Kingsbury
patent: 4204174 (1980-05-01), King
patent: 4205272 (1980-05-01), Kumagai
patent: 4484153 (1984-11-01), Borras et al.
patent: 4602220 (1986-07-01), Kurihara
patent: 4686488 (1987-08-01), Attenborough
patent: 4713631 (1987-12-01), Enderby et al.
patent: 4758802 (1988-07-01), Jackson
patent: 4800432 (1989-01-01), Barnett et al.
patent: 4805198 (1989-02-01), Stern et al.
patent: 4847516 (1989-07-01), Fujita et al.
patent: 4888564 (1989-12-01), Ishigaki
patent: 4893087 (1990-01-01), Davis
patent: 4905306 (1990-02-01), Anderson
patent: 4926140 (1990-05-01), Schenberg
patent: 4926144 (1990-05-01), Bell
patent: 4980653 (1990-12-01), Shepherd
patent: 4998077 (1991-03-01), Nanni et al.
patent: 5034703 (1991-07-01), Schumacher
patent: 5036295 (1991-07-01), Kamitani
patent: 5038117 (1991-08-01), Miller
patent: 5055802 (1991-10-01), Hietala et al.
patent: 5079521 (1992-01-01), Gaskell et al.
patent: 5117206 (1992-05-01), Imamura
patent: 5157358 (1992-10-01), Benson
patent: 5175884 (1992-12-01), Suarez
patent: 5224132 (1993-06-01), Goldberg
patent: 5258720 (1993-11-01), Tanis et al.
patent: 5258724 (1993-11-01), Tanis et al.
patent: 5281927 (1994-01-01), Parker
patent: 5315269 (1994-05-01), Fujii
patent: 5369376 (1994-11-01), Leblebicioglu
patent: 5379003 (1995-01-01), Bizen
patent: 5446767 (1995-08-01), Nakagawa et al.
patent: 5495205 (1996-02-01), Parker et al.
patent: 5517534 (1996-05-01), Knierim
patent: 5534825 (1996-07-01), Goma et al.
patent: 5539359 (1996-07-01), Goma
patent: 5576667 (1996-11-01), Goma
patent: 5581584 (1996-12-01), Inoue et al.
patent: 5625325 (1997-04-01), Rotzoll et al.
patent: 5644270 (1997-07-01), Moyer et al.
patent: 5648744 (1997-07-01), Prakash et al.
patent: 5686864 (1997-11-01), Martin et al.
patent: 5691669 (1997-11-01), Tsai et al.
patent: 5705955 (1998-01-01), Freeburg et al.
patent: 5739730 (1998-04-01), Rotzoll
patent: 5740524 (1998-04-01), Pace et al.
patent: 5748043 (1998-05-01), Koslov
patent: 5758276 (1998-05-01), Shirakawa et al.
patent: 5808531 (1998-09-01), Nakano
patent: 5844868 (1998-12-01), Takahashi et al.
patent: 5852384 (1998-12-01), Sakakura et al.
patent: 5856763 (1999-01-01), Reeser et al.
patent: 5864069 (1999-02-01), Kiser
patent: 5898345 (1999-04-01), Namura et al.
patent: 5909150 (1999-06-01), Kosteinik et al.
patent: 5936474 (1999-08-01), Rousselin
patent: 5963100 (1999-10-01), Tolson et al.
Kral et al., "RF-CMOS Oscillators with Switched Tuning," Custom IC Conference, Santa Clara, CA, 4 sheets appearing on pp. 555-558 of the proceedings (May 1998).
Rudell, et al., "Second Generation Multi-Standard Monolithic CMOS RF Transceiver," University of California, Berkeley, Slides 1 through 9 (Jun. 1996).
Cho, et al., "Multi-Standard Monolithic CMOS RF Transceiver," University of California, Berkeley, Slides 1 through 26 (Jun. 1996).
National Semiconductor Corp., "LMX2330L/LMX2331L/LMX2332L PLLatinum .TM. Low Power Dual Frequency Synthesizer for RF Personal Communications," Datasheet (Feb. 1998).
Cong et al., "Multigigahertz CMOS Dual-Modulus Prescalar IC"Journal of Solid-State Circuits, vol. 23, No. 5, pp. 1189-1194; (Oct. 1988).
Duncan et al., "A 1 GHz Quardrature Simusoidal Oscillator, "IEEE 1995 Custom Intergrated Circuits Conference; pp. 91-94 (1995).
Craninckx et al., "A 1.8-GHz CMOS Los-Phase-Noise Voltage-Controlled Oscillator with Prescaler,"IEEE Journal of Solid-State Circuits, vol. 30, No. 12; pp. 1474-1482; (Dec. 1995).
Chang, et al., "A 1.2 GHz CMOS Dual-Modules Prescalr Using New Dynamic D-Type Flip-Flops,"IEEE Journal of Solid-State Circuits, vol. 31, No. 5 pp. 749-752; (May 1996).
Craninckx et al., "A 1.75-GHz/3-V Dual-Modulus Divide-by-128/129 Prescaler in 0.7-.mu.m CMOS,"IEEE Journal of Solid-State Circuits, vol. 31, No. 7; pp. 890-897; (Jul. 1996).

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