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Class Information
Number: 330/126
Name: Amplifiers > With plural amplifier channels (e.g., parallel amplifier channels) > Amplifying different frequencies in different channels
Description: Subject matter wherein at least one of the channels amplifies a signal of a different frequency from at least one other channel.

Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8704593 Metamaterial power amplifier systems Apr. 22, 2014
8610504 Dual band amplifier Dec. 17, 2013
8588433 Electret microphone circuit Nov. 19, 2013
8576004 Metamaterial power amplifier systems Nov. 5, 2013
8548093 Power amplification based on frequency control signal Oct. 1, 2013
8536943 Selective narrowband feedback for a digital predistorter Sep. 17, 2013
8502599 System and method for a multi-band power-amplifier Aug. 6, 2013
8421532 Metamaterial power amplifier systems Apr. 16, 2013
8335478 Communication device Dec. 18, 2012
8315336 Systems and methods of RF power transmission, modulation, and amplification, including a switching stage embodiment Nov. 20, 2012
8314655 RF power amplifier and RF power module using the same Nov. 20, 2012
8233860 Power amplification apparatus for envelope modulation of high frequency signal and method for controlling the same Jul. 31, 2012
8189713 Matrix power amplifiers for high speed wireless applications May. 29, 2012
8179195 Current-feedback instrumentation amplifiers May. 15, 2012
8154340 Metamaterial power amplifier systems Apr. 10, 2012
8098181 Attenuator circuit Jan. 17, 2012
8064555 Input/output multi-level channelizer amplifier Nov. 22, 2011
8036293 Method and apparatus for a multi-protocol XDSL line driver Oct. 11, 2011
8026764 Generation and amplification of substantially constant envelope signals, including switching an output among a plurality of nodes Sep. 27, 2011
8013673 Radio frequency power amplifier Sep. 6, 2011
7965990 Wireless backhaul power amplification using fourier transform matricies Jun. 21, 2011
7944989 Quadrature modulation apparatus, method, program, and recording medium May. 17, 2011
7929923 Wide dynamic range out-phasing array transmitter Apr. 19, 2011
7884669 Broadband amplifying device Feb. 8, 2011
7847636 Low noise amplifier for ultra wide band Dec. 7, 2010
7825731 RF amplifying device Nov. 2, 2010
7800450 Re-configurable low noise amplifier utilizing feedback capacitors Sep. 21, 2010
7769355 System-in-package wireless communication device comprising prepackaged power amplifier Aug. 3, 2010
7750733 Systems and methods of RF power transmission, modulation, and amplification, including embodiments for extending RF transmission bandwidth Jul. 6, 2010
7714662 Multiband output impedance matching circuit having passive devices, amplifier including multiband input impedance matching circuit having passive devices, and amplifier including multiband inp May. 11, 2010
7679438 High frequency circuit, semiconductor device, and high frequency power amplification device Mar. 16, 2010
7656228 Matching circuit and multi-band amplifier Feb. 2, 2010
7642859 Power amplifier Jan. 5, 2010
7622989 Multi-band, inductor re-use low noise amplifier Nov. 24, 2009
7616061 Low noise amplifier for ultra wide band Nov. 10, 2009
7593703 Frequency switch for multiband power amplifier applications and multiband/multistandard power amplifier module Sep. 22, 2009
7580687 System-in-package wireless communication device comprising prepackaged power amplifier Aug. 25, 2009
7570111 Apparatus and method for wideband amplification of RF signals Aug. 4, 2009
7554391 Amplifier having a virtual ground and method thereof Jun. 30, 2009
7554411 Wireless transmitter having multiple programmable gain amplifiers (PGAs) with tuned impedance to provide substantially linear response Jun. 30, 2009
7548616 Termination device for a telephone line Jun. 16, 2009
7548111 Miniature dual band power amplifier with reserved pins Jun. 16, 2009
7541865 EER high frequency amplifier Jun. 2, 2009
7528652 Amplifying device and radio communication circuit May. 5, 2009
7508261 Systems of miniaturized compatible radio frequency wireless devices Mar. 24, 2009
7471146 Optimized circuits for three dimensional packaging and methods of manufacture therefore Dec. 30, 2008
7446604 Multi-band low noise amplifier Nov. 4, 2008
7415251 Apparatus and method for improving efficiency of a power amplifier having a high peak-to-average power ratio Aug. 19, 2008
7388959 Harmonic generator and pre-amp Jun. 17, 2008
7382185 Loop segment switching system Jun. 3, 2008

1 2 3 4 5

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