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Class Information
Number: 330/4.5
Name: Amplifiers > Parametric amplifiers
Description: Subject matter including (1) a nonlinear reactance, (2) means for applying an input signal frequency to said nonlinear reactance, (3) means for effectively applying a pumping frequency higher than said signal frequency to said nonlinear reactance, and (4) means for abstracting the amplified output therefrom, whereby sum and difference frequencies are produced, one or both of which (but usually the difference frequency [called the idler frequency] reacting with the pumping frequency to produce energy at the signal frequency which is combined in phase with the input signal.

Sub-classes under this class:

Class Number Class Name Patents
330/4.8 Gyromagnetic type (e.g., ferrite) 1
330/4.9 Semiconductor type (e.g., with semiconductor diode) 36
330/4.6 Traveling wave type 21

Patents under this class:

Patent Number Title Of Patent Date Issued
7990210 Amplifier, amplifying method, and filter Aug. 2, 2011
7911257 MOSFET parametric amplifier Mar. 22, 2011
7630126 Two-pump optical parametric devices having reduced stimulated Raman scattering noise levels Dec. 8, 2009
7164526 Parametric amplification using two pump waves Jan. 16, 2007
6870664 Nondegenerate optical parametric chirped pulse amplifier Mar. 22, 2005
6611168 Differential parametric amplifier with physically-coupled electrically-isolated micromachined structures Aug. 26, 2003
6281746 Parametric cavity microwave amplifier Aug. 28, 2001
6265934 Q-switched parametric cavity amplifier Jul. 24, 2001
5401953 Optically-switched submillimeter-wave oscillator and radiator having a switch-to-switch propagation delay Mar. 28, 1995
5075573 Low-noise optical wave amplification device Dec. 24, 1991
4984298 Wideband low noise detector Jan. 8, 1991
4906949 Monomode optical source and an optical amplifying device tuneable in the near infra red and application to selective and regeneration amplifying devices Mar. 6, 1990
4639923 Optical parametric oscillator using urea crystal Jan. 27, 1987
4622510 Parametric electric machine Nov. 11, 1986
4618783 Production of short light pulses by time compression Oct. 21, 1986
4604551 Cyclotron resonance maser system with microwave output window and coupling apparatus Aug. 5, 1986
4365216 Surface-acoustic-wave device Dec. 21, 1982
4325144 Hysteretic SIS junction mixer Apr. 13, 1982
4313223 Signal-amplification frequency-conversion apparatus having a common active component Jan. 26, 1982
4306195 Pulse compressor with saturation-matched focusing geometry Dec. 15, 1981
4288765 Frequency selector apparatus Sep. 8, 1981
4224577 Multistaged stokes injected Raman capillary waveguide amplifier Sep. 23, 1980
4222011 Stokes injected Raman capillary waveguide amplifier Sep. 9, 1980
4215323 Instability and regenerative pulsation in optical cavities Jul. 29, 1980
4160956 Nuclear-pumped uranyl salt laser Jul. 10, 1979
4160215 Single diode upper sideband terminated parametric amplifier Jul. 3, 1979
4128772 Generation of tunable far-infrared radiation Dec. 5, 1978
4071831 Amplifying characteristics of a cavity-enclosed nonlinear medium Jan. 31, 1978
4063105 Method of and apparatus for generating tunable coherent radiation by noncollinear phase-matched sum-difference frequency optical mixing Dec. 13, 1977
4058739 Method and apparatus for phase matching by adjustment of the fundamental frequencies Nov. 15, 1977
4056784 Suppression of parametric oscillations in IMPATT amplifiers and oscillators Nov. 1, 1977
4050027 Optical signal amplifier Sep. 20, 1977
4028637 Parametrically-stable negative resistance diode circuit Jun. 7, 1977
4012699 Amplifying characteristics of a cavity-enclosed nonlinear medium Mar. 15, 1977
4011462 Pulsed infrared difference frequency generation in CdGeAs.sub.2 Mar. 8, 1977
3992675 Broadband, upper sideband terminated, low-noise parametric amplifier Nov. 16, 1976
3934208 Low noise modular parametric amplifier Jan. 20, 1976
3931623 Reliable earth terminal for satellite communications Jan. 6, 1976

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