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Class Information
Number: 330/302
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including frequency-responsive means in the signal transmission path
Description: Subject matter including frequency-responsive means in the signal transmission path that causes corresponding changes in the amplifier gain.










Sub-classes under this class:

Class Number Class Name Patents
330/306 And bandpass, broadband (e.g., wideband) or sidepass means 358
330/304 And equalizing means 114
330/305 And tuning means 261
330/303 Including an active device in the filter means 127


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14

Patent Number Title Of Patent Date Issued
7071783 Temperature-compensated power sensing circuit for power amplifiers Jul. 4, 2006
7064613 Amplifier bias system and method Jun. 20, 2006
7061329 Semiconductor device having balanced circuit for use in high frequency band Jun. 13, 2006
7061321 Low impedance read amplifier for magnetoresistive head Jun. 13, 2006
7061316 High frequency power detector with dBm-linear characteristic and method of regulating the power of an electrical HF-oscillation Jun. 13, 2006
7057464 Lineariser Jun. 6, 2006
7053717 Method and apparatus for realizing a low noise amplifier May. 30, 2006
7053701 Power amplifier output stage with multiple power states and improved efficiency May. 30, 2006
7046084 Power amplifier and radio communication device using the amplifier May. 16, 2006
7046085 Power amplifier and radio communication device using the amplifier May. 16, 2006
7042288 Charge amplifier for piezoelectric pressure sensor May. 9, 2006
7042294 Power amplifier system May. 9, 2006
7038547 Amplifier circuit May. 2, 2006
7034620 RF power amplifier employing bias circuit topologies for minimization of RF amplifier memory effects Apr. 25, 2006
7030691 Power amplifier Apr. 18, 2006
7026867 Floating input amplifier for capacitively coupled communication Apr. 11, 2006
7023279 Linear pre-amplifier for radio-frequency power amplifier Apr. 4, 2006
7019593 Variable-gain cascode amplifier using voltage-controlled and variable inductive load Mar. 28, 2006
7019594 Method and apparatus for analyzing performance of a multi-stage radio frequency amplifier Mar. 28, 2006
7009455 Tunable power amplifier matching circuit Mar. 7, 2006
6992545 GPS low noise amplifier unit, duplex filter unit and GPS-cellular hand-set Jan. 31, 2006
6982603 Radio-frequency power amplification circuit having stabilization circuit Jan. 3, 2006
6970040 Multi-mode/multi-band power amplifier Nov. 29, 2005
6970039 Efficiency enhancement for MMIC amplifiers Nov. 29, 2005
6967528 Variable gain amplifier Nov. 22, 2005
6963247 Gain stabilization technique for narrow band integrated low noise amplifiers Nov. 8, 2005
6961553 Bidirectional distributed amplifier Nov. 1, 2005
6956438 Radio frequency power amplifier module Oct. 18, 2005
6949974 Radio frequency power amplifier Sep. 27, 2005
6943631 DC-coupled multi-stage amplifier using all-pass resistive/capacitive network for level shifting Sep. 13, 2005
6943624 Radio frequency power amplifier Sep. 13, 2005
6940347 Amplifier Sep. 6, 2005
6940539 Variable cable length compensator for video imaging systems Sep. 6, 2005
6940354 Microwave power amplifier Sep. 6, 2005
6937097 High-frequency power amplifier having differential inputs Aug. 30, 2005
6933780 Predistortion circuit and power amplifier Aug. 23, 2005
6906599 Designing methods and circuits for impedance matching Jun. 14, 2005
6906591 Amplifier having MOS capacitor compensation Jun. 14, 2005
6903612 Tunable low noise amplifier Jun. 7, 2005
6897732 Amplifier May. 24, 2005
6897727 Current mode switch capacitor circuit May. 24, 2005
6895225 System for matching an antenna for a wireless communication device May. 17, 2005
6888428 High frequency semiconductor integrated circuit capable of switching between characteristics May. 3, 2005
6879216 Integrated circuit that provides access to an output node of a filter having an adjustable bandwidth Apr. 12, 2005
6859105 Variable gain control circuit and integrated circuit device having the same Feb. 22, 2005
6859104 Tunable power amplifier matching circuit Feb. 22, 2005
6859103 Bias circuit for improving linearity of a radio frequency power amplifier Feb. 22, 2005
6856794 Monolithic GPS RF front end integrated circuit Feb. 15, 2005
6847258 Power amplifier, power amplifying method and radio communication apparatus Jan. 25, 2005
6842076 Radio frequency power amplifier module Jan. 11, 2005

1 2 3 4 5 6 7 8 9 10 11 12 13 14










 
 
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