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Class Information
Number: 331/182
Name: Oscillators > Amplitude control or stabilization
Description: Subject matter wherein means are provided in the oscillator circuit for adjusting, controlling or regulating the amplitude of the generated oscillations and not provided for in any preceding subclass. The oscillation amplitude control means may be manually set or varied or may be controlled automatically responsive to changes in some condition, such as the amplitude of the generated oscillations.

Sub-classes under this class:

Class Number Class Name Patents
331/183 Automatic 285

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8710929 System and method for combined I/Q generation and selective phase interpolation Apr. 29, 2014
8710933 Oscillation circuit Apr. 29, 2014
8648625 Frequency synthesizer Feb. 11, 2014
8648662 Oscillator circuit with a fast transient Feb. 11, 2014
8638173 System and method of calibrating a phase-locked loop while maintaining lock Jan. 28, 2014
8618888 Voltage controlled oscillator having a bandwidth adjusted amplitude control loop Dec. 31, 2013
8618889 Oscillation drive device, physical quantity measurement device and electronic apparatus Dec. 31, 2013
8614606 Delay-line self-oscillator Dec. 24, 2013
8558630 Oscillator circuit and electronic apparatus including the same Oct. 15, 2013
8552808 Apparatus and method for oscillator resonator power control Oct. 8, 2013
8471644 Digital automatic gain control circuits and methods for controlling the amplitude of a time-varying signal Jun. 25, 2013
8427252 Oscillators with low power mode of operation Apr. 23, 2013
8368480 Phase locked loop circuits and gain calibration methods thereof Feb. 5, 2013
8305153 Crystal oscillator with fast start-up and low current consumption Nov. 6, 2012
8183939 Ring oscillator May. 22, 2012
8120430 Stable VCO operation in absence of clock signal Feb. 21, 2012
8093958 Clock, frequency reference, and other reference signal generator with a controlled quality factor Jan. 10, 2012
8085098 PLL circuit Dec. 27, 2011
8044734 Method and apparatus for mitigating VCO pulling Oct. 25, 2011
7982553 Clock generator Jul. 19, 2011
7978017 Control voltage generator for a clock, frequency reference, and other reference signal generator Jul. 12, 2011
7936223 Low spur phase-locked loop architecture May. 3, 2011
7911284 Voltage controlled oscillator Mar. 22, 2011
7902933 Oscillator circuit Mar. 8, 2011
7893781 Low-voltage MEMS oscillator Feb. 22, 2011
7888974 Frequency synthesizer Feb. 15, 2011
7863989 Replica-bias automatic gain control Jan. 4, 2011
7855606 Oscillator device Dec. 21, 2010
7839230 PLL oscillation circuit, polar transmitting circuit, and communication device Nov. 23, 2010
7825701 Frequency synthesizer Nov. 2, 2010
7800452 Phase locked loop circuit Sep. 21, 2010
7778356 Modulator and method for producing a modulated signal Aug. 17, 2010
7760031 Method for reducing inter modulation distortion products of a combined carrier wave using phase alignment of the carrier components Jul. 20, 2010
7737797 Controllable oscillating system and related method for selectively adjusting currents passing through cross-coupling driving device Jun. 15, 2010
7728688 Power supply circuit for a phase-locked loop Jun. 1, 2010
7728679 Calibration of voltage controlled oscillators Jun. 1, 2010
7719374 Oscillator signal stabilization May. 18, 2010
7639093 Voltage-controlled oscillator having independent output frequency and amplitude Dec. 29, 2009
7612618 PLL apparatus for OFDM system having variable channel bands and operating method thereof Nov. 3, 2009
7579917 Output circuit for oscillator Aug. 25, 2009
7573347 Digitally controlled oscillator device and method for generating an oscillating signal with a digitally controlled phase locked loop Aug. 11, 2009
7570925 Discrete amplitude calibration of oscillators in frequency synthesizers Aug. 4, 2009
7522010 Ultra-low power crystal oscillator Apr. 21, 2009
7508281 Frequency synthesizer Mar. 24, 2009
7482883 Gain normalization of a digitally controlled oscillator in an all digital phase locked loop based transmitter Jan. 27, 2009
7463106 Push-push voltage controlled oscillator for obtaining differential signals Dec. 9, 2008
7449972 Voltage controlled oscillator with anti supply voltage variation and/or process variation Nov. 11, 2008
7414486 Device and method for power calibration of an oscillator Aug. 19, 2008
7382206 Voltage controlled oscillator with body of transistors bias control Jun. 3, 2008
7324561 Systems and methods for generating an output oscillation signal with low jitter Jan. 29, 2008

1 2

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