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Class Information
Number: 331/1R
Name: Oscillators > Automatic frequency stabilization using a phase or frequency sensing means
Description:










Sub-classes under this class:

Class Number Class Name Patents
331/1A Afc with logic elements 1,649
331/15 Amplitude compensation 68
331/6 Klystron oscillator 6
331/5 Magnetron oscillator 13
331/3 Molecular resonance stabilization 169
331/9 Oscillator with distributed parameter-type discriminator 37
331/17 Particular error voltage control (e.g., intergrating network) 1,934
331/34 Particular frequency control means 808
331/10 Plural a.f.s. for a single oscillator 278
331/2 Plural oscillators controlled 610
331/4 Search sweep of oscillator 186
331/8 Transistorized controls 309
331/16 Tuning compensation 1,354
331/14 With intermittent comparison controls 503
331/18 With reference oscillator or source 515
331/30 With stable heterodyne oscillator or source 29


Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8704563 Phase-lock loop Apr. 22, 2014
8665034 Varactor tuning control using redundant numbering Mar. 4, 2014
8659472 Method and apparatus for highly accurate higher frequency signal generation and related level gauge Feb. 25, 2014
8648626 Clock generators, clock generating methods, and mobile communication device using the clock generator Feb. 11, 2014
8638172 Local oscillator Jan. 28, 2014
8564374 Oscillator calibration apparatus and oscillator calibration method Oct. 22, 2013
8559579 All-digital frequency synthesis with DCO gain calculation Oct. 15, 2013
8508303 Digital frequency/phase locked loop Aug. 13, 2013
8487707 Frequency synthesizer Jul. 16, 2013
8489053 Compensation of local oscillator phase jitter Jul. 16, 2013
8473771 Integrated circuit having frequency dependent noise avoidance Jun. 25, 2013
8466717 Frequency synthesizer Jun. 18, 2013
8451066 PLL circuit and angular velocity sensor using the same May. 28, 2013
8436686 Method and apparatus for efficient time slicing May. 7, 2013
8368472 Oscillation circuit Feb. 5, 2013
8362845 Method and apparatus to improve performance of GPSDO's and other oscillators Jan. 29, 2013
8334725 Circuit and method for controlling mixed mode controlled oscillator and CDR circuit using the same Dec. 18, 2012
8330637 Time-to-digital converter and operation method thereof Dec. 11, 2012
8321716 Integrated circuit having frequency dependent noise avoidance Nov. 27, 2012
8266468 Integrated circuit with interpolation to avoid harmonic interference Sep. 11, 2012
8258877 Feed-back and feed-forward systems and methods to reduce oscillator phase-noise Sep. 4, 2012
8253499 Charge pump and phase detection apparatus, phase-locked loop and delay-locked loop using the same Aug. 28, 2012
8248167 VCO frequency temperature compensation system for PLLs Aug. 21, 2012
8242848 Oscillation frequency control circuit, and DC-DC converter and semiconductor device having the same Aug. 14, 2012
8237608 Magnetron and radar apparatus Aug. 7, 2012
8237511 Local oscillator and phase adjusting method for the same Aug. 7, 2012
8193866 All-digital phase-locked loop Jun. 5, 2012
8183937 Integrated circuit frequency generator May. 22, 2012
8166322 Portable terminal device Apr. 24, 2012
8164390 Regulating an operating condition of an integrated circuit to compensate for a manufacturing variation Apr. 24, 2012
8154782 Method and system for generating a drive signal for a MEMS scanner Apr. 10, 2012
8138842 PLL frequency synthesizer Mar. 20, 2012
8125253 System and method for dynamically switching between low and high frequency reference clock to PLL and minimizing PLL output frequency changes Feb. 28, 2012
8120394 Automatic frequency calibration circuit and automatic frequency calibration method Feb. 21, 2012
8102158 Phase synchronization circuit Jan. 24, 2012
8076979 Lock detection circuit for phase locked loop Dec. 13, 2011
8076978 Circuit with noise shaper Dec. 13, 2011
8065553 Phase interpolator for a timing signal generating circuit Nov. 22, 2011
8058915 Digital phase-locked loop and digital phase-frequency detector thereof Nov. 15, 2011
8049568 Feedback-based linearization of voltage controlled oscillator Nov. 1, 2011
8026769 Frequency-locked clock generator Sep. 27, 2011
8022775 Systems and methods for maintaining a drive signal to a resonant circuit at a resonant frequency Sep. 20, 2011
8008978 Oscillator circuit and memory system Aug. 30, 2011
8004324 Phase-locked loop frequency synthesizer of fractional N-type, and phase shift circuit with frequency converting function Aug. 23, 2011
7999622 Adaptive phase noise cancellation for fractional-N phase locked loop Aug. 16, 2011
7990224 Dual reference phase tracking phase-locked loop Aug. 2, 2011
7982552 Automatic frequency calibration apparatus and method for a phase-locked loop based frequency synthesizer Jul. 19, 2011
7978017 Control voltage generator for a clock, frequency reference, and other reference signal generator Jul. 12, 2011
7978111 High resolution time-to-digital converter Jul. 12, 2011
7956695 High-frequency low-gain ring VCO for clock-data recovery in high-speed serial interface of a programmable logic device Jun. 7, 2011

1 2 3 4 5 6










 
 
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