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Class Information
Number: 331/132
Name: Oscillators > Negative resistance or negative transconductance oscillator
Description: Oscillators wherein the oscillator comprises a two-terminal negative resistance device connected to a tuned circuit, the absolute magnitude of the negative resistance being less than the resonant impedance of the tuned circuit.

Sub-classes under this class:

Class Number Class Name Patents
331/133 Secondary emission (e.g., dynatron) 1
331/134 Transitron type 1

Patents under this class:

Patent Number Title Of Patent Date Issued
8451069 Oscillator having negative resistance device for generating electromagnetic wave May. 28, 2013
8427248 Stabilization network and a semiconductor device having the stabilization network Apr. 23, 2013
8380140 Microwave/millimeter wave communication apparatus Feb. 19, 2013
8351867 Oscillator, frequency generating circuit and wireless communication system using the oscillator Jan. 8, 2013
8324976 Oscillator circuitry having negative differential resistance Dec. 4, 2012
8212718 Microwave/millimeter wave sensor apparatus Jul. 3, 2012
8073078 Split channel receiver with very low second order intermodulation Dec. 6, 2011
7659784 Injection-locked frequency divider Feb. 9, 2010
7590401 Super-regenerative microwave detector Sep. 15, 2009
7283008 Oscillator circuit with temperature compensation function Oct. 16, 2007
7012487 Transconductance device employing native MOS transistors Mar. 14, 2006
6980062 Oscillator circuit with temperature compensation function Dec. 27, 2005
6949983 High-frequency piezoelectric oscillator Sep. 27, 2005
6933793 Method of overtone selection and level control in an integrated circuit CMOS negative resistance oscillator to achieve low jitter Aug. 23, 2005
6606007 Crystal oscillator with minimized Q reduction Aug. 12, 2003
6552621 Low phase noise, wide tuning range oscillator utilizing a one port SAW resonator and method of operation Apr. 22, 2003
6411170 Oscillation circuit Jun. 25, 2002
6317008 Clock recovery using an injection tuned resonant circuit Nov. 13, 2001
6239664 Low phase noise, wide tuning range oscillator utilizing a one port saw resonator and method of operation May. 29, 2001
6175285 Injection tuned resonant circuits Jan. 16, 2001
6169461 High-frequency oscillating circuit Jan. 2, 2001
6107893 Voltage tunable active inductorless oscillator Aug. 22, 2000
5959504 Voltage controlled oscillator (VCO) CMOS circuit Sep. 28, 1999
5920235 Voltage controlled oscillator integrated circuit Jul. 6, 1999
5883549 Bipolar junction transistor (BJT)--resonant tunneling diode (RTD) oscillator circuit and method Mar. 16, 1999
5635879 Voltage controlled oscillator formed of two differential transconductors Jun. 3, 1997
5479129 Variable propagation delay digital signal inverter Dec. 26, 1995
5414392 Amplifier circuit May. 9, 1995
5343170 Voltage controlled oscillator provided with negative feedback biasing Aug. 30, 1994
5117205 Electrically controllable oscillator circuit, and electrically controllable filter arrangement comprising said circuits May. 26, 1992
4801898 Voltage-controlled oscillator Jan. 31, 1989
4760353 Integrated gyrator oscillator Jul. 26, 1988
4751480 One port magnetostatic wave resonator Jun. 14, 1988
4608543 Controllable effective resistance and phase lock loop with controllable filter Aug. 26, 1986
4518930 Negative resistance circuit for VCO May. 21, 1985
4485356 Variable low frequency sinusoidal oscillator using simulated inductance Nov. 27, 1984
4394660 Phased array feed system Jul. 19, 1983
4091340 Oscillator circuit arrangements including nullator-norator pairs May. 23, 1978
4091341 Oscillator circuit arrangements including nullator-norator pairs May. 23, 1978
3967210 Multimode and multistate ladder oscillator and frequency recognition device Jun. 29, 1976

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