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Class Information
Number: 455/313
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Frequency modifying or conversion
Description: Subject matter including means whereby a modulated carrier wave signal is changed to another carrier frequency, e.g., an intermediate frequency signal, the frequency of which lies between that of the modulated input signal and the frequency of the lower frequency modulating signal.










Sub-classes under this class:

Class Number Class Name Patents
455/323 Particular frequency conversion structure or circuitry 927
455/314 Plural separate successive conversions 209
455/317 Unwanted oscillation or radiation prevention 184
455/318 With specified local oscillator structure or coupling 370


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

Patent Number Title Of Patent Date Issued
8712466 Radio frequency splitter Apr. 29, 2014
8693972 Down-conversion of multiple RF channels Apr. 8, 2014
8693973 670 GHz Schottky diode based subharmonic mixer with CPW circuits and 70 GHz IF Apr. 8, 2014
8675628 Demultiplexing apparatus, multiplexing apparatus, communication apparatus, and relay satellite Mar. 18, 2014
8676145 Mixer circuits for second order intercept point calibration Mar. 18, 2014
8660513 Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships Feb. 25, 2014
8626105 Mixer-amplifier for an RF receive chain Jan. 7, 2014
8620252 Ultra low power, low noise switched capacitor radio frequency mixer Dec. 31, 2013
8611820 Signal separation for energy harvesting Dec. 17, 2013
8606208 Filter circuit and radio terminal including filter circuit Dec. 10, 2013
8606209 Apparatus and methods for efficient implementation of tuners Dec. 10, 2013
8600333 Apparatus for mixing frequency Dec. 3, 2013
8594607 Methods and systems for down-converting a signal using a complementary transistor structure Nov. 26, 2013
8588725 Apparatus, system, and method for down converting and up-converting electromagnetic signals Nov. 19, 2013
8577323 High dynamic range time-varying integrated receiver for elimination of off-chip filters Nov. 5, 2013
8577322 Signal mixer having a single-ended input and a differential output Nov. 5, 2013
8570100 Direct sampling circuit and receiver Oct. 29, 2013
8570920 Systems and methods for combining signals from multiple active wireless receivers Oct. 29, 2013
8571142 System and method for non-crystal-based communications Oct. 29, 2013
8571510 High linearity low noise receiver with load switching Oct. 29, 2013
8548416 Semiconductor chip and radio frequency circuit Oct. 1, 2013
8543078 Harmonic mixer circuit Sep. 24, 2013
8538341 Method of communicating by radio frequencies in a home-automation installation Sep. 17, 2013
8532225 DC compensation for VLIF signals Sep. 10, 2013
8532236 Quadrature signal generation in radio-frequency apparatus and associated methods Sep. 10, 2013
8526883 RF switch for an RF splitter Sep. 3, 2013
8521112 Quadrature mixer Aug. 27, 2013
8515380 Current mode blixer with noise cancellation Aug. 20, 2013
8514915 Apparatus and method for frequency shifting of a wireless signal and systems using frequency shifting Aug. 20, 2013
8509353 Digital receiver Aug. 13, 2013
8503545 I/Q imbalance compensation Aug. 6, 2013
8498604 Double balanced mixer Jul. 30, 2013
8493578 Pixel clock generator and image forming apparatus Jul. 23, 2013
8489051 Low-power and noise-cancelling wideband receiver front-end Jul. 16, 2013
8483645 Dual carrier amplifier circuits and methods Jul. 9, 2013
8483628 Multiple-phase frequency translated filter Jul. 9, 2013
8483332 Oscillating apparatus, receiving apparatus, and oscillation control method Jul. 9, 2013
8467757 Wideband receiver for wireless communication system and method for controlling the same Jun. 18, 2013
8467762 Frequency converting device, television device and frequency converting method Jun. 18, 2013
8463185 Wireless communication system using surface acoustic wave (SAW) second harmonic techniques Jun. 11, 2013
8463206 System and method for preserving input impedance of a current-mode circuit Jun. 11, 2013
8447224 Data processing terminal system and transmitting and receiving method using the same May. 21, 2013
8433013 Receiver and electronic device using the same Apr. 30, 2013
8433276 Sampling circuit and receiver Apr. 30, 2013
8422964 Partitioned radio-frequency apparatus and associated methods Apr. 16, 2013
8417192 Radio frequency (RF) transceiver Apr. 9, 2013
8406724 Applications of universal frequency translation Mar. 26, 2013
8406707 Systems and methods for implementing a harmonic rejection mixer Mar. 26, 2013
8406357 Filter circuit Mar. 26, 2013
8401510 Common-gate common-source transconductance stage for RF downconversion mixer Mar. 19, 2013

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










 
 
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