| Patents for H03D 7 - Transference of modulation from one carrier to another, e.g. frequency-changing (7,673) |
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| 04/21/2004 | CN1491479A Transmitter and receiver circuit for radio frequency |
| 04/21/2004 | CN1491452A ASK modulator for NRD guide |
| 04/21/2004 | CN1491451A NRD guide frequency converter |
| 04/21/2004 | CN1491450A Ask收发器 Ask Transceivers |
| 04/21/2004 | CN1147100C Filtering in receiver by using log-polar signal processing |
| 04/21/2004 | CN1146927C Hybrid coil of printed circuit transformer of radio frequency mixer |
| 04/20/2004 | US6725463 Dual mode tuner for co-existing digital and analog television signals |
| 04/20/2004 | US6725159 GPS receiver and method for processing GPS signals |
| 04/20/2004 | US6724804 Frequency converter and radio communications system employing the same |
| 04/20/2004 | US6724441 Tuning system and method in broadcast signal receiver |
| 04/20/2004 | US6724335 Systems and methods for digital upconversion for television signals |
| 04/15/2004 | WO2004032339A2 Subharmonic mixer |
| 04/14/2004 | EP1407540A2 Quadrature generator with image reject mixer |
| 04/14/2004 | CN1146249C VTR signal processing circuit |
| 04/14/2004 | CN1146126C Dual band transceiver |
| 04/14/2004 | CN1146122C Radio terminal |
| 04/14/2004 | CN1146109C Method for eliminating de. component and filtering device obtained by using said method |
| 04/13/2004 | US6721551 Transmitting and receiving apparatus |
| 04/08/2004 | US20040067744 High-frequency signal receiving apparatus |
| 04/07/2004 | EP1406380A1 Mixer circuit |
| 04/07/2004 | EP1320934A4 Frequency translator using a cordic phase rotator |
| 04/07/2004 | CN1488221A Modulator with low sensitivity to amplitude and phase errors of the carrier signal |
| 04/07/2004 | CN1487757A Multi-wave band radio-frequency receiving method and equipment in mobile communication system |
| 04/07/2004 | CN1487306A GPS receiver and method for processing GPS signals |
| 04/07/2004 | CN1145388C Signal processing method for radio communication, radio receiver and transmitting machine |
| 04/07/2004 | CN1145261C Transmission method utilizing fractional N-phase-locked loop to synthesis conversion oscillator signal |
| 04/01/2004 | WO2003085820A3 Quadrature switching mixer with reduced leakage |
| 04/01/2004 | US20040063419 Subharmonic mixer |
| 04/01/2004 | US20040063418 Mixing apparatus |
| 04/01/2004 | US20040061544 Mixer circuit and differential amplifier circuit |
| 03/31/2004 | CN1144431C Carrier changer and changing method |
| 03/31/2004 | CN1144383C Radio receiving system |
| 03/31/2004 | CN1144354C Frequency changer |
| 03/30/2004 | US6714776 System and method for an image rejecting single conversion tuner with phase error correction |
| 03/30/2004 | US6714604 Receiver |
| 03/30/2004 | US6714263 Multiple conversion tuner |
| 03/25/2004 | WO2004025844A1 Method and system for re-modulation using zero if |
| 03/25/2004 | WO2004004266A3 Receiver device, especially for mobile radio |
| 03/25/2004 | US20040057537 Apparatus and method for receiving RF signal free of 1/f noise in radio communication system |
| 03/24/2004 | EP1401253A1 Television tuner |
| 03/24/2004 | EP1221258A4 Single-chip digital cable tv/cable modem tuner ic |
| 03/23/2004 | US6711397 Structures and methods for direct conversion from radio frequency modulated signals to baseband signals |
| 03/23/2004 | US6711396 Method to reduce local oscillator or carrier leakage in frequency converting mixers |
| 03/23/2004 | US6711395 Receiving module and receiver |
| 03/23/2004 | US6710644 Low pass filter corner frequency tuning circuit and method |
| 03/18/2004 | WO2004023650A1 Push-pull amplifier and frequency conversion circuit |
| 03/18/2004 | WO2004023643A1 Circuit arrangement having a frequency converter |
| 03/18/2004 | US20040053594 Siingle sideband mixer and method of extracting single sideband signal |
| 03/18/2004 | US20040053593 Signal mixers |
| 03/18/2004 | US20040051598 Method and apparatus for re-modulation using zero if |
| 03/17/2004 | EP1398873A1 Gilbert-cell mixer |
| 03/16/2004 | US6708027 Method and apparatus for harmonic free generation in multiple mixing frequency conversion |
| 03/16/2004 | US6708026 Division based local oscillator for frequency synthesis |
| 03/16/2004 | US6707861 Demodulator for an HDTV receiver |
| 03/11/2004 | WO2004021584A2 Direct downconversion receiver |
| 03/11/2004 | WO2004021560A1 System and method for establishing a bias current using a feedback loop |
| 03/11/2004 | US20040048585 Method and apparatus for up-and-down-conversion of radio frequency (rf) signals |
| 03/11/2004 | US20040046898 Television tuner having level of harmonics of oscillation signal suppressed low |
| 03/11/2004 | US20040046599 Bias circuit and semiconductor device |
| 03/11/2004 | DE10239856A1 Schaltungsanordnung mit Frequenzumsetzer Circuit with frequency converter |
| 03/10/2004 | EP1396088A2 Quadrature envelope-sampling of intermediate frequency signal in receiver |
| 03/10/2004 | CN1481605A Circuit melangeur |
| 03/10/2004 | CN1141836C Radio receiver |
| 03/09/2004 | US6704559 Broadband RF mixer with improved intermodulation suppression |
| 03/09/2004 | US6704558 Image-reject down-converter and embodiments thereof, such as the family radio service |
| 03/09/2004 | US6704551 Calibration of in-phase and quadrature transmit branches of a transmitter |
| 03/09/2004 | US6704549 Multi-mode, multi-band communication system |
| 03/09/2004 | US6704372 Digital implementation of multi-channel demodulators |
| 03/04/2004 | WO2004019482A1 Mixer circuit |
| 03/04/2004 | WO2003100962A3 Analogue mixer |
| 03/04/2004 | WO2001089092A9 Apparatus for radio frequency processing with dual modulus synthesizer |
| 03/04/2004 | US20040043743 Direct downconversion receiver |
| 03/04/2004 | US20040043742 System and method for establishing a bias current using a feedback loop |
| 03/04/2004 | US20040043741 Integrated circuit |
| 03/04/2004 | US20040042564 Signal frequency splitter and frequency shift key decoding apparatus using the same |
| 03/04/2004 | US20040041616 Apparatus and method for improved chopping mixer |
| 03/04/2004 | US20040041598 Frequency conversion apparatus |
| 03/04/2004 | DE10154511B4 Netzwerkanalysator und Verfahren zur Vektorcharakterisierung von Frequenzumsetzungsvorrichtungen Network analyzer and method for vector characterization of frequency conversion devices |
| 03/03/2004 | EP1393551A2 Quadrature demodulator |
| 03/03/2004 | EP1393455A2 Quadrature alignment in communications receivers |
| 03/03/2004 | EP1393436A1 Circuit arrangement for translating an oscillator frequency into a carrier frequency |
| 03/03/2004 | CN1479967A Multi-mode radio communications device using common reference oscillator |
| 02/26/2004 | WO2003034715A3 Monolithic integrated circuit for a television receiver |
| 02/26/2004 | US20040038662 Reducing active mixer flicker noise |
| 02/26/2004 | US20040038655 Simplified high frequency tuner and tuning method |
| 02/26/2004 | US20040037379 Multi-mode radio communications device using a common reference oscillator |
| 02/19/2004 | WO2004015439A2 Improved mixers with a plurality of local oscillators and systems based thereon |
| 02/19/2004 | WO2003085819A3 Linearity improvement of gilbert mixers |
| 02/18/2004 | EP1266447B1 Assembly and method for compensating the offset of a mixer |
| 02/18/2004 | EP0894369B1 Distribution of radio-frequency signals through low bandwidth infrastructures |
| 02/18/2004 | CN1476677A Subharmonic circuit and method |
| 02/18/2004 | CN1139271C Wireless selective call receiving apparatus and method which can reduce current consumption |
| 02/17/2004 | US6694131 Method and apparatus for adaptive image rejection |
| 02/17/2004 | US6694128 Frequency synthesizer using universal frequency translation technology |
| 02/17/2004 | US6693980 Wideband fast-hopping receiver front-end and mixing method |
| 02/17/2004 | US6693493 Single-ended differential circuit using complementary devices |
| 02/12/2004 | WO2004013955A1 Receiver comprising multiple parallel reception means |
| 02/12/2004 | WO2003050945A3 Image reject mixer |
| 02/12/2004 | WO2002043255A3 Quadrature generator with image reject mixer |
| 02/12/2004 | US20040029544 Direct conversion circuit capable of eliminating distortion of base band signals |