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Class Information
Number: 329/347
Name: Demodulators > Amplitude modulation demodulator
Description: Subject matter where the demodulator extracts the modulating signal from an input AM signal.










Sub-classes under this class:

Class Number Class Name Patents
329/371 Coherer type demodulator 4
329/368 Electron discharge demodulator device having more than two electrodes (e.g., triode, tetrode etc.) 1
329/348 Having plural demodulation outputs 43
329/349 Having specific distortion, noise or other interference prevention, reduction or compensation 83
329/370 Including diode demodulator device 31
329/354 Including microwave or distributed parameter structure 15
329/367 Including regenerative feedback in non-oscillating demodulator 1
329/369 Including three or more terminal discrete semiconductor demodulator device 31
329/358 Input signal combined with local oscillator or carrier frequency signal (e.g., synchronous demodulator) 60
329/363 Input signal split into plural signals 37
329/357 Single or vestigial sideband type 55
329/356 Suppressed carrier double sideband type 24


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8659394 RFID tag and method receiving RFID tag signal Feb. 25, 2014
8638249 System and method for high input capacitive signal amplifier Jan. 28, 2014
8629716 Modulator, demodulator and modulator-demodulator Jan. 14, 2014
8588353 Frequency selective IQ correction Nov. 19, 2013
8559564 Transmitting/receiving system and method of processing broadcast signal in transmitting/receiving system Oct. 15, 2013
8525585 Demodulation circuit and RFID tag including the demodulation circuit Sep. 3, 2013
8508293 Amplitude shift keying demodulator and method for demodulating an ask signal Aug. 13, 2013
8339194 Demodulator, a method for demodulating an ask signal and an on-board unit including the demodulator Dec. 25, 2012
8299849 Binarization circuit, demodulation circuit, and tuner for vehicle Oct. 30, 2012
8294513 Demodulator and demodulation method Oct. 23, 2012
8284869 QAM demodulation Oct. 9, 2012
8258862 Demodulation circuit and RFID tag including the demodulation circuit Sep. 4, 2012
8229022 Modulation and demodulation method, modulation apparatus and demodulation apparatus Jul. 24, 2012
8207831 Transponder demodulator for a low antenna limiter threshold Jun. 26, 2012
8198936 Semiconductor device Jun. 12, 2012
8188787 Peak detector for detecting peaks in a modulated signal May. 29, 2012
8159289 Chip card having an adjustable demodulation unit Apr. 17, 2012
8159290 Test apparatus, demodulation apparatus, test method, demodulation method and electric device Apr. 17, 2012
8160191 Correction of quadrature errors Apr. 17, 2012
8115538 Modulation and demodulation circuit Feb. 14, 2012
8081725 Edge evaluation of ASK-modulated signals Dec. 20, 2011
8059757 Signal processing device and method Nov. 15, 2011
7986182 Fully differential demodulator with variable gain, and method for demodulating a signal Jul. 26, 2011
7919994 Reception comparator for signal modulation upon a supply line Apr. 5, 2011
7902918 Demodulation apparatus, test apparatus and electronic device Mar. 8, 2011
7868690 Comparator with sensitivity control Jan. 11, 2011
7847627 Demodulator for amplitude-modulated signals Dec. 7, 2010
7839210 Detector of a radio-frequency signal Nov. 23, 2010
7746186 Wideband quadrature imbalance compensation system and method Jun. 29, 2010
7663432 Fully differential demodulator with variable gain, and method for demodulating a signal Feb. 16, 2010
7609783 Amplitude shift keying (ASK) demodulation circuit based on a self sample as a basis application in an organism implantation microsystem Oct. 27, 2009
7570109 System and method for demodulating amplitude modulated signals Aug. 4, 2009
7535290 AM radio receiving circuit May. 19, 2009
7526052 Configurable filter and receiver incorporating same Apr. 28, 2009
7508257 Low-power digital demodulator Mar. 24, 2009
7492835 Synchrodyning apparatus Feb. 17, 2009
7480589 Method and system for displaying signal envelope information for an RF signal Jan. 20, 2009
7446695 Precision pulse detection system for radar sensors Nov. 4, 2008
7439800 Amplitude demodulator for an electromagnetic transponder Oct. 21, 2008
7397301 Pyroelectric demodulating detector Jul. 8, 2008
7307472 Digital demodulator with a low sampling frequency Dec. 11, 2007
7302011 Quadrature frequency doubling system Nov. 27, 2007
7292093 Envelope detector with DC level shifting Nov. 6, 2007
7265610 Error detection in a signal in amplitude modulation Sep. 4, 2007
7215723 Demodulator for an amplitude-modulated alternating signal May. 8, 2007
7106188 Method and system for providing an activation signal based on a received RF signal Sep. 12, 2006
7003680 Contactless apparatus and card-type device having clock rectifier that is independent of power rectifier and demodulator with RC time constant based on selectable resistor Feb. 21, 2006
6985540 AM demodulator Jan. 10, 2006
6975165 Method and system for the conversion of phase shift keying signals (PSK) into amplitude shift keying signals (ASK) Dec. 13, 2005
6907088 Contactless IC card for preventing incorrect data recovery in demodulation of an amplitude-modulated carrier wave Jun. 14, 2005

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