Patents
Sitemap › H03 - Basic electronic circuitry › H03C - Modulation › H03C 1 - Amplitude modulation
Patents for H03C 1 - Amplitude modulation (2,214)
03/2004
03/03/2004EP1394931A2 Method and device for producing and sending discontinuoulsy a fundamental frequency in a predetermined carrier frequency
03/02/2004US6700551 Antenna signal amplitude modulation method
03/02/2004US6700092 Pulsing intelligent RF modulation controller
02/2004
02/19/2004US20040032301 Microwave pulse generator
02/18/2004EP1389830A1 Device and method for selectively demodulating ir codes
02/18/2004CN1139283C Radio equipment including frequency synthesizer
02/17/2004US6694128 Frequency synthesizer using universal frequency translation technology
02/17/2004US6691567 System and method for tire pressure monitoring including automatic tire location recognition
02/12/2004DE10233569A1 Mikrowellen-Pulsgenerator Microwave pulse generator
02/11/2004EP1388932A1 Switching modulator
02/04/2004CN1473392A Direct digital amplitude modulator
02/03/2004US6687493 Method and circuit for down-converting a signal using a complementary FET structure for improved dynamic range
01/2004
01/29/2004US20040018821 Methods and apparatus for detecting the envelope of RF power signals
01/28/2004EP1385266A1 Microwave pulse generator
01/07/2004EP1378055A1 Power oscillator for control of waveshape and amplitude
12/2003
12/30/2003US6671337 Carrier modulator for use in a transmitter or transceiver
12/30/2003US6668636 System and method for tire pressure monitoring including tire location recognition
12/17/2003EP1110303B1 System and method for frequency up-conversion
12/11/2003WO2003103149A2 Apparatus for detecting the envelope of rf power signals
12/10/2003CN1130887C Double blance modulator and four phase phase-shift modulator
11/2003
11/20/2003WO2003096532A1 Demodulation apparatus for digital audio amplifier
11/20/2003WO2003085415A3 Return to zero and sampling pulse generating circuits and method for direct digital up conversion
11/19/2003CN1457145A Demodulator for digital audio-frequency amplifier
11/18/2003US6647773 System and method for integrated tire pressure monitoring and passive entry
10/2003
10/30/2003WO2003090353A2 Improved method and apparatus for tracking a resonant frequency
10/28/2003US6640090 Signal transmitter utilizing ask modulation wave
10/16/2003WO2003085415A2 Return to zero and sampling pulse generating circuits and method for direct digital up conversion
10/02/2003WO2003081772A1 Optimising power consumption in amplifiers
10/02/2003WO2003081771A1 A bias circuit for a bipolar transistor
10/02/2003WO2002003541A3 Digitally modulated rf amplifier system having reduced intermodulation energy at rf channel edges
10/02/2003US20030186670 Method and circuit or down-converting a signal
10/01/2003CN1446423A Carrier modulator used in transmitter or receiver
10/01/2003CN1123140C Deivce and method for digital vestigial sideband modulation
09/2003
09/30/2003US6628165 Power controllers for amplitude modulation
09/18/2003WO2003077489A1 Resonant power converter for radio frequency transmission and method
09/18/2003WO2003075632A2 Rf amplifier system with interface to provide a computer readable spectral depiction of the re output
09/17/2003EP1345319A2 Method and system for reducing non-linearities
09/16/2003US6621357 Power oscillator for control of waveshape and amplitude
09/09/2003US6617938 Return to zero and sampling pulse generating circuits and method for direct digital up conversion
09/04/2003US20030164799 Antenna for tire pressure monitoring wheel electronic device
09/04/2003US20030164774 System and method for remote tire pressure monitoring
09/04/2003US20030164760 System and method for tire pressure monitoring using vehicle radio
09/04/2003US20030164759 System and method for tire pressure monitoring with optimal tire pressure indication during tire pressure adjustment
09/04/2003US20030164758 System and method for tire pressure monitoring providing automatic tire location recognition
09/04/2003US20030164741 System and method for using a saw based RF transmitter for AM modulated transmission in a TPM
09/04/2003US20030164035 Tire pressure monitoring system with low frequency initiation approach
09/04/2003US20030164034 System and method for using a saw based RF transmitter for FM transmission in a TPM
09/04/2003US20030164033 System and method for tire pressure monitoring including vehicle immobilization
09/04/2003US20030164032 System and method for integrated tire pressure monitoring and passive entry
09/04/2003US20030164031 System and method for tire pressure monitoring including tire location recognition
09/04/2003US20030164030 System and method for tire pressure monitoring including automatic tire location recognition
08/2003
08/28/2003WO2003071755A1 Method for detecting quadrature modulator carrier leak adjusting point by geometrical analysis/calculation method, carrier leak adjusting method, and quadrature modulation apparatus
08/27/2003EP1338085A1 A direct digital amplitude modulator
08/13/2003CN1118168C Balance modulator
08/06/2003EP1012963B1 Low noise gilbert multiplier cells and quadrature modulators, and related methods
08/06/2003CN1117426C Multi-carrier transmitting apparatus and method
07/2003
07/30/2003EP1330881A2 Radio transmitters
07/29/2003CA2298928C Linear power control loop
07/24/2003US20030139168 Methods and systems for down-converting electromagnetic signals, and applications thereof
07/02/2003CN1113452C Low noise gilbert multiplier cells and quarature modulators, and related method
06/2003
06/24/2003US6583678 Electrical circuit and method for pulse modulation of a carrier signal
06/17/2003US6580902 Frequency translation using optimized switch structures
06/05/2003WO2003047089A1 Alternate timing signal for a vestigial sideband modulator
06/05/2003WO2003047088A2 Frequency modulator using switched capacitors
06/05/2003US20030102931 Device including a circuit with adjusting means for adjusting at least one characteristic signal value of a modulated signal
05/2003
05/29/2003US20030100270 Wireless audio transmission system
05/29/2003US20030099317 Alternate timing signal for a vestigial sideband modulator
05/28/2003EP1315285A2 Method and system for down-converting an electromagnetic signal
05/22/2003WO2003043319A1 Rf system integrated with rf switch and rf modulation
05/21/2003CN1419335A Positive and negative semi-cycle two-path amplitude modulation technology and modulator and demodulator relative circuit thereof
05/20/2003US6566948 Method and system for reducing non-linearities
04/2003
04/29/2003CA2080786C Vector fm modulator
04/23/2003CN1412964A Stereo synthetic coder (MPX) for FM transmission
04/10/2003US20030068990 Method and system for frequency up-conversion with a variety of transmitter configurations
04/09/2003CN1409231A Method for switching grouped signal in different frequency system and its switching circuit
04/08/2003CA2209290C Frequency synthesizer
04/01/2003US6542722 Method and system for frequency up-conversion with variety of transmitter configurations
03/2003
03/26/2003CN1406426A Transmitter
03/19/2003EP1293075A2 Carrier modulator for use in a transmitter or transceiver
03/12/2003EP1292015A2 Stereo Multiplex Encoder (MPX) for FM Transmission
03/12/2003EP1012962B1 Multi-carrier transmitting apparatus and method
03/11/2003US6531935 Vector modulator
03/06/2003US20030043932 Stereo multiplex encoder (MPX) for FM transmission
03/05/2003EP1289122A1 Balanced quadrature modulator with double frequency conversion
02/2003
02/26/2003CN1399488A Two-stage up-conversion modulator
02/18/2003US6522213 SSB transmitter
02/06/2003US20030024907 Pulsing intelligent RF modulation controller
02/05/2003EP0885510A4 Method and apparatus for routing a digitized rf signal to a plurality of paths
01/2003
01/22/2003EP1277272A2 Frequency converter
01/21/2003US6509806 Adjusting untrimmed VCO during operation of the oscillator
01/16/2003US20030012300 DRM/AM simulcast
01/16/2003US20030011861 Double up-conversion modulator
01/15/2003EP1276257A1 DRM/AM simulcast
01/10/2003CA2390630A1 Double up-conversion modulator
01/03/2003WO2002035787A3 Modulator which uses amplitude restoration
12/2002
12/31/2002CA2298926C Temperature compensated power detector
12/17/2002US6496545 Single side-band mixer
11/2002
11/21/2002WO2001063743A3 Modulation circuit
11/20/2002CN1380747A Pulse intelligent radio-frequency modulation controller
11/07/2002WO2000024117A9 Method and system for down-converting an electromagnetic signal
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