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Class Information
Number: 331/10
Name: Oscillators > Automatic frequency stabilization using a phase or frequency sensing means > Plural a.f.s. for a single oscillator
Description: Subject matter wherein oscillator is provided with two or more A.F.S. means, each having a different effect in tuning the oscillator. For example, one A.F.S. means may provide a coarse tuning control and another A.F.S. means may effect a fine tuning control of the oscillator.

Sub-classes under this class:

Class Number Class Name Patents
331/13 Motor control of oscillator 3
331/11 Plural comparators or discriminators 521

Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8710938 Electronic device including predicted frequency error estimation of a voltage controlled oscillator and related methods Apr. 29, 2014
8564340 Dual phase-locked loop circuit and method for controlling the same Oct. 22, 2013
8531245 Temperature compensation in a PLL Sep. 10, 2013
8513995 System including circuitry providing multiple circuit paths for controlling a characteristic of a period signal Aug. 20, 2013
8508270 System and method for adjusting a characteristic of a periodic signal with use of a filtered bias voltage Aug. 13, 2013
8508308 Automatic frequency calibration of a multi-LCVCO phase locked loop with adaptive thresholds and programmable center control voltage Aug. 13, 2013
8436686 Method and apparatus for efficient time slicing May. 7, 2013
8416025 Reference assisted control system and method thereof Apr. 9, 2013
8378751 Frequency synthesizer with multiple tuning loops Feb. 19, 2013
8363774 Methods and apparatuses of serial link transceiver without external reference clock Jan. 29, 2013
8339206 PLL Dec. 25, 2012
8334725 Circuit and method for controlling mixed mode controlled oscillator and CDR circuit using the same Dec. 18, 2012
8289057 Phase locked loop Oct. 16, 2012
8264388 Frequency integrator with digital phase error message for phase-locked loop applications Sep. 11, 2012
8258878 Phase locked loop and method thereof Sep. 4, 2012
8255733 Clock delay and skew control systems and methods Aug. 28, 2012
8242848 Oscillation frequency control circuit, and DC-DC converter and semiconductor device having the same Aug. 14, 2012
8183934 PLL circuit and voltage-controlled oscillator May. 22, 2012
8134392 Phase locked loop Mar. 13, 2012
8125254 Techniques for configuring multi-path feedback loops Feb. 28, 2012
8120394 Automatic frequency calibration circuit and automatic frequency calibration method Feb. 21, 2012
8089317 Phase-locked loop circuit, recording-and-reproducing apparatus, and electronic apparatus Jan. 3, 2012
8085098 PLL circuit Dec. 27, 2011
8063707 Phase locked loop Nov. 22, 2011
8018289 Holdover circuit for phase-lock loop Sep. 13, 2011
7982552 Automatic frequency calibration apparatus and method for a phase-locked loop based frequency synthesizer Jul. 19, 2011
7932784 Frequency and phase locked loop synthesizer Apr. 26, 2011
7873173 Active vibratory noise control apparatus Jan. 18, 2011
7782143 Phase locked loop and delay locked loop with chopper stabilized phase offset Aug. 24, 2010
7750747 Clock selection circuit and synthesizer Jul. 6, 2010
7746179 Method and apparatus for selecting a frequency generating element Jun. 29, 2010
7741919 Architecture for maintaining constant voltage-controlled oscillator gain Jun. 22, 2010
7737792 Phase Locked loop circuit and semiconductor integrated circuit device using the same Jun. 15, 2010
7688001 Method and system for providing a charge pump for low voltage applications Mar. 30, 2010
7684501 Apparatus and method for carrier frequency offset and phase compensation in communication system Mar. 23, 2010
7679453 Phase-locked loop capable of dynamically adjusting phase of output signal according to detection result of phase/frequency detector, and method thereof Mar. 16, 2010
7622996 Multi-loop phase locked loop circuit Nov. 24, 2009
7616066 Oscillation device and controlling method therefor Nov. 10, 2009
7580443 Clock generating method and clock generating circuit Aug. 25, 2009
7504894 Phase locked loop circuit and semiconductor integrated circuit device using the same Mar. 17, 2009
7498892 Split-biased interpolated voltage-controlled oscillator and phase locked loop Mar. 3, 2009
7482882 Voltage control oscillation circuit and adjusting method for the same Jan. 27, 2009
7453323 Circuit, control system, IC, transmitting and receiving apparatus, control method and program Nov. 18, 2008
7443257 Mechanical oscillator control electronics Oct. 28, 2008
7420427 Phase-locked loop with a digital calibration loop and an analog calibration loop Sep. 2, 2008
7411464 Systems and methods for mitigating phase jitter in a periodic signal Aug. 12, 2008
7408415 Voltage controlled oscillator phase locked loop circuit with loop filter capacitance tuning Aug. 5, 2008
7372337 Voltage controlled oscillator comprising an injection pulling compensation circuit May. 13, 2008
7362826 Receiver including an oscillation circuit for generating an image rejection calibration tone Apr. 22, 2008
7355482 Methods and apparatus for compensating a variable oscillator for process, voltage, and temperature variations using a replica oscillator Apr. 8, 2008

1 2 3 4 5 6

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