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Class Information
Number: 331/46
Name: Oscillators > Plural oscillators
Description: Subject matter comprising an electrical system including at least two significant oscillators.










Sub-classes under this class:

Class Number Class Name Patents
331/48 Adjustable frequency 107
331/50 Cascade or tandem connected 62
331/47 Oscillator used to vary amplitude or frequency of another oscillator 137
331/56 Parallel connected 199
331/49 Selectively connected to common output or oscillator substitution 276
331/55 Synchronized, triggered or pulsed 173


Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
8258881 Method and system for drift reduction in a low power oscillator (LPO) utilized in a wireless communication device Sep. 4, 2012
8258879 Capacitor coupled quadrature voltage controlled oscillator Sep. 4, 2012
8248172 Wideband oscillation circuit Aug. 21, 2012
8232843 Matrix structure oscillator Jul. 31, 2012
8212622 Oscillation circuit and recording apparatus Jul. 3, 2012
8212625 Differential VCO and quadrature VCO using center-tapped cross-coupling of transformer Jul. 3, 2012
8204154 DC offset calibration Jun. 19, 2012
8198945 Quadrature oscillator with high linearity Jun. 12, 2012
8183948 Ultra-compact PLL with wide tuning range and low noise May. 22, 2012
8174325 Adaptive injection-locked oscillator array for broad spectrum RF analysis May. 8, 2012
8159306 Integrated circuit with low temperature coefficient and associated calibration method Apr. 17, 2012
8160168 Method and system for efficient transmission and reception of RF energy in MIMO systems using polar modulation and direct digital frequency synthesis Apr. 17, 2012
8144249 Multi-slicing horizontal synchronization signal generating apparatus and method Mar. 27, 2012
8143955 Oscillator circuit for radio frequency transceivers Mar. 27, 2012
8143954 Oscillation device with auxiliary oscillating means Mar. 27, 2012
8134415 Electronic circuitry Mar. 13, 2012
8130044 Phase-locked loop circuitry with multiple voltage-controlled oscillators Mar. 6, 2012
8130047 Open loop coarse tuning for a PLL Mar. 6, 2012
8130049 Submillimeter-wave signal generation by linear superimposition of phase-shifted fundamental tone signals Mar. 6, 2012
8125279 System and method for reducing holdover duration Feb. 28, 2012
8120432 System and method for selecting optimum local oscillator discipline source Feb. 21, 2012
8115556 Resonant device with improved features Feb. 14, 2012
8106715 Low-power oscillator Jan. 31, 2012
8081037 Ring oscillator using analog parallelism Dec. 20, 2011
8067987 Millimeter-wave wideband voltage controlled oscillator Nov. 29, 2011
8058933 Low frequency clock generation Nov. 15, 2011
8058934 Apparatus and method for frequency generation Nov. 15, 2011
8054138 Multi-oscillator circuit with variable power supply Nov. 8, 2011
8044738 Oscillator apparatus Oct. 25, 2011
8040143 Capacitance sensing with mismatch compensation Oct. 18, 2011
8035456 Multi-phase signal generator and voltage-controlled oscillator thereof Oct. 11, 2011
8013681 Wide spectrum radio transmit architecture Sep. 6, 2011
8008981 Multi-phase ultra-wideband signal generator using differential pulse oscillators and array thereof Aug. 30, 2011
7986192 Harmonic rejection mixer and harmonic rejection mixing method Jul. 26, 2011
7982547 Phase locked loop-based tuning adjustable filter Jul. 19, 2011
7982549 Dual self-calibrating low-power oscillator system and operation Jul. 19, 2011
7978012 Dual PLL loop for phase noise filtering Jul. 12, 2011
7952438 Injection locking clock generator and clock synchronization circuit using the same May. 31, 2011
7944316 Multi-phase oscillator May. 17, 2011
7940830 Fast hopping frequency synthesizer May. 10, 2011
7902930 Colpitts quadrature voltage controlled oscillator Mar. 8, 2011
7898344 Phase-locked oscillator and multi-radar system using same Mar. 1, 2011
7898345 Method of frequency synthesis for fast switching Mar. 1, 2011
7890081 Direct frequency conversion demodulator and modulator-demodulator Feb. 15, 2011
7889014 Ring based impedance control of an output driver Feb. 15, 2011
7859421 Circuit and method for detecting a voltage change Dec. 28, 2010
7852161 Complementary ring oscillator with capacitive coupling Dec. 14, 2010
7827430 Integrated circuit with interpolation to avoid harmonic interference Nov. 2, 2010
7821350 Methods and apparatus for dynamic frequency scaling of phase locked loops for microprocessors Oct. 26, 2010
7808327 Method and apparatus to provide digitally controlled crystal oscillators Oct. 5, 2010

1 2 3 4 5 6 7










 
 
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