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Class Information
Number: 330/143
Name: Amplifiers > Thermally responsive impedance
Description: Subject matter wherein the amplifier contains in its circuit an impedance element whose impedance value is responsive to the temperature changes therein by reason of the heat generated by the current flow therethrough, or the ambient temperature of the impedance element, or whose impedance value may be changed by separate electrical control means or other heat control means.

Patents under this class:

Patent Number Title Of Patent Date Issued
7253682 Antenna amplifier Aug. 7, 2007
6812790 Signal read circuit Nov. 2, 2004
6262630 Rapidly-responding diode detector with temperature compensation Jul. 17, 2001
4939787 Temperature controlled resistive-liquid dummy load Jul. 3, 1990
4891603 Logarithmic amplifier Jan. 2, 1990
4646029 Variable-gain amplifying circuit Feb. 24, 1987
4516865 Resistance thermometer May. 14, 1985
4352053 Temperature compensating voltage generator circuit Sep. 28, 1982
4268887 Protective system for power stage of IC amplifier May. 19, 1981
4185251 Compensated automatic gain control Jan. 22, 1980
4166981 Continuous signal amplitude regulator Sep. 4, 1979
4157513 Protective system for power stage of monolithic circuitry Jun. 5, 1979
4149124 Thermal protection of amplifiers Apr. 10, 1979
4146847 Power limiting circuitry for use with power amplifier Mar. 27, 1979
4056783 Linear sound amplifier circuit Nov. 1, 1977
4054845 Transient and thermal protection Oct. 18, 1977
4041396 Environmentally sensitive transmit power maximizing circuitry and method Aug. 9, 1977
3940707 Electronic devices for the automatic control of gain and roll-off in amplifiers Feb. 24, 1976

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