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Browse by Category: Main > Electrical & Energy
Class Information
Number: 327/557
Name: Miscellaneous active electrical nonlinear devices, circuits, and systems > Specific identifiable device, circuit, or system > Unwanted signal suppression > Active filter > Bandpass
Description: Subject matter wherein a circuit arrangement attenuates frequencies on either side of a predetermined range of frequencies of an input signal.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8704408 Switch matrix modeling system and method Apr. 22, 2014
8705675 Device and method for receiving RF signals based on heterodyne architecture using complex IF subsampling Apr. 22, 2014
8686788 Filter circuit Apr. 1, 2014
8648652 Band pass filter and calibration method for band pass filter Feb. 11, 2014
8620978 System and method for filtering electrophysiological signals Dec. 31, 2013
8620251 Electronic device with adjustable filter and associated methods Dec. 31, 2013
8618872 Filter with controlled cut-off frequency step-down Dec. 31, 2013
8610494 Low power active filter Dec. 17, 2013
8508292 Phase matching band-pass filter using exponential function approximation Aug. 13, 2013
8502596 Filter circuitry Aug. 6, 2013
8447275 Lossless inductor current sensing in a switch-mode power supply May. 21, 2013
8373502 Gm-C filter tuning circuit based on relaxation oscillator Feb. 12, 2013
8354880 Op-R, a solid state filter Jan. 15, 2013
8275026 Equalizer with controllably weighted parallel high pass and low pass filters and receiver including such an equalizer Sep. 25, 2012
8269551 Complex filter and calibration method Sep. 18, 2012
8222942 Initialization circuit and bank active circuit using the same Jul. 17, 2012
8120417 Transfer-function control in an active filter Feb. 21, 2012
8064508 Equalizer with controllably weighted parallel high pass and low pass filters and receiver including such an equalizer Nov. 22, 2011
8005451 Filter circuit and radio communication apparatus Aug. 23, 2011
7911264 Method for reconstructing a noise-reduced periodic voltage signal Mar. 22, 2011
7868687 Ideal-like band-pass filter and single-frequency filter Jan. 11, 2011
7865087 Bandpass filter circuit, band-elimination filter circuit, infrared signal processing circuit Jan. 4, 2011
7852146 Integrated channel filter using multiple resonant filters and method of operation Dec. 14, 2010
7813710 Receiving circuit Oct. 12, 2010
7808310 Differential band-pass filter having symmetrically interwoven inductors Oct. 5, 2010
7750730 Bandpass filter circuit Jul. 6, 2010
7719350 Bandpass sample-and-hold circuit May. 18, 2010
7710210 Apparatus for distributing a signal May. 4, 2010
7679431 Low flicker noise mixer and buffer Mar. 16, 2010
7672657 Tunable filter apparatus, systems, and methods Mar. 2, 2010
7652526 Narrow band pass filter Jan. 26, 2010
7639071 Active LC band pass filter Dec. 29, 2009
7560982 Apparatus for reducing apparent capacitance in high frequency filter for power line Jul. 14, 2009
7521990 Noise reduction circuits Apr. 21, 2009
7521991 Balanced band-pass filter for radio receivers Apr. 21, 2009
7511570 Transconductance filtering circuit Mar. 31, 2009
7498871 Spectrum spreaders including tunable filters and related devices and methods Mar. 3, 2009
7486338 Fully integrated terrestrial TV tuner architecture Feb. 3, 2009
7463084 Method and device for suppressing variation of DC level of signal reproduced from optical storing media Dec. 9, 2008
7463086 Apparatus and method for tuning a band pass filter Dec. 9, 2008
7436250 Highly selective filtering device and corresponding filtering method Oct. 14, 2008
7429889 Control system for programmable filters Sep. 30, 2008
7417495 Reconfigurable frequency filter Aug. 26, 2008
7372323 Resonance limiter circuits for an integrated circuit May. 13, 2008
RE40292 Bandpass filter May. 6, 2008
7368981 Limit circuit May. 6, 2008
7308241 Receiver system Dec. 11, 2007
7304533 Integrated channel filter using multiple resonant filters and method of operation Dec. 4, 2007
7248103 Complex band-pass filter Jul. 24, 2007
7245186 Bandpass amplifier Jul. 17, 2007

1 2 3 4










 
 
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