| Patents for H03B 21 - Generation of oscillations by combining unmodulated signals of different frequencies (1,067) |
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| 10/18/2001 | WO2001028099A3 Master frequency generator |
| 10/18/2001 | US20010031627 Multiband frequency generation using a single PLL-circuit |
| 10/18/2001 | US20010030556 Frequency correction circuit for a periodic source such as a crystal oscillator |
| 10/03/2001 | CN1316150A System and method for lookup table by NCO |
| 09/25/2001 | US6295020 Master frequency generator |
| 08/23/2001 | US20010016863 Frequency synthesizer and gaussian noise generator using the same |
| 08/22/2001 | EP1126359A1 Frequency synthesizer and gaussian noise generator using the same |
| 08/02/2001 | DE19928998A1 Elektronische Schaltungsanordnung zur Erzeugung einer Sendefrequenz Electronic circuit arrangement for generating a transmit frequency |
| 07/19/2001 | WO2001052001A2 Device for producing a signal having a substantially temperature-independent frequency |
| 07/19/2001 | CA2396934A1 Device for producing a signal having a substantially temperature-independent frequency |
| 07/18/2001 | EP1117017A1 Means for generating a signal having a frequency that is highly independent from temperature |
| 07/10/2001 | US6259301 Method and apparatus for selecting from multiple mixers |
| 06/19/2001 | US6249155 Frequency correction circuit for a periodic source such as a crystal oscillator |
| 05/30/2001 | EP1104112A1 Wide band, low noise and high resolution synthesizer |
| 05/30/2001 | EP1103125A2 Frequency shifting using convolution and an nco |
| 05/30/2001 | CN1297286A Frequency synthesizer and oscillation frequency controlling method |
| 05/16/2001 | EP1099298A1 Synthesising a sine wave |
| 05/09/2001 | EP1098433A2 Frequency synthesizer and oscillation frequency control method |
| 04/19/2001 | WO2001028099A2 Master frequency generator |
| 04/04/2001 | EP1089426A1 Frequency synthesis device |
| 04/03/2001 | US6211708 Frequency doubling circuits, method, and systems including quadrature phase generators |
| 03/01/2001 | WO2001015313A1 Local oscillator apparatus for radio frequency communication systems |
| 03/01/2001 | WO2001015312A1 Master frequency generator |
| 02/22/2001 | DE19939036A1 Frequency sweeping device for frequency synthesiser of spectrum analyser, has clock frequency of accumulator control by circuit programmed for desired variation with time |
| 02/06/2001 | US6184817 Master frequency generator |
| 02/01/2001 | WO2001008311A1 Clock signal generator |
| 01/31/2001 | CN1282466A Signal generating circuit, and transmitter, receiver and transmitting and receiving device using the circuit |
| 01/25/2001 | WO2001006343A1 Method and device for spectrally pure, programmable signal generation |
| 01/23/2001 | US6177845 Frequency-providing circuit |
| 01/18/2001 | DE19916574C1 Frequenzaufbereitungssystem für einen Mobilfunk-Dual Band-Sender/Empfänger (Transceiver) Frequency processing system for a mobile dual-band transmitter / receiver (transceiver) |
| 01/04/2001 | WO2001001562A1 Electronic circuit arrangement generating a transmit frequency |
| 01/04/2001 | WO2001001561A1 Frequency doubling circuits, methods, and systems including quadrature phase generators |
| 01/04/2001 | CA2377790A1 Electronic circuit arrangement generating a transmit frequency |
| 12/26/2000 | US6167102 System and method employing a reduced NCO lookup table |
| 12/19/2000 | US6163229 Frequency generator for generating two independent FSK signals |
| 11/14/2000 | US6147543 Method and apparatus for selecting from multiple mixers |
| 10/19/2000 | WO2000062433A1 Frequency synthesis system for a mobile telephone dual-band transceiver |
| 09/06/2000 | EP1033818A1 Signal generating circuit, and transmitter, receiver and transmitting and receiving device using the circuit |
| 06/27/2000 | US6081696 Method and apparatus for controlling frequency of a multi-channel transmitter |
| 06/07/2000 | CN1256023A Frequency synthetic circuit regulated by digit |
| 05/23/2000 | US6067411 Adaptive frequency synthesizer with synchronization |
| 03/29/2000 | EP0988691A1 Frequency synthesis circuit tuned by digital words |
| 03/23/2000 | WO2000008792A3 Frequency shifting using convolution and an nco |
| 02/22/2000 | US6028425 Signal generator |
| 02/17/2000 | WO2000008792A2 Frequency shifting using convolution and an nco |
| 02/02/2000 | EP0977361A1 Frequency-providing circuit |
| 12/29/1999 | WO1999067877A1 Synthesising a sine wave |
| 12/29/1999 | CA2334975A1 Synthesising a sine wave |
| 12/21/1999 | US6005446 Microwave frequency synthesizer |
| 12/21/1999 | US6005419 Apparatus and method for harmonic reduction in a direct digital synthesizer |
| 11/02/1999 | US5977805 Frequency synthesis circuit tuned by digital words |
| 10/26/1999 | US5974362 Signal generator for testing radio frequency components |
| 07/29/1999 | WO1999038252A1 Frequency synthesis circuit tuned by digital words |
| 07/29/1999 | CA2284842A1 Frequency synthesis circuit tuned by digital words |
| 05/27/1999 | WO1999026349A1 Signal generating circuit, and transmitter, receiver and transmitting and receiving device using the circuit |
| 04/27/1999 | US5898325 Dual tunable direct digital synthesizer with a frequency programmable clock and method of tuning |
| 02/10/1999 | CN1207835A Method and apparatus for selecting from multiple mixers |
| 01/27/1999 | CN1206244A Medium frequency output-less bridge balance mixer with monochip IC and microwave FET |
| 12/02/1998 | CN2299423Y VHF frequency synthesizer |
| 11/29/1998 | CA2206465A1 Direct digital frequency synthesizer using pulse gap shifting technique |
| 11/04/1998 | EP0875094A1 Method and apparatus for selecting from multiple mixers |
| 11/03/1998 | US5832375 Superheterodyne radio receiver |
| 10/21/1998 | EP0872051A2 Method and apparatus for controlling frequency of a multi-channel transmitter |
| 10/20/1998 | US5825252 Synthesized oscillation circuit |
| 10/13/1998 | US5821782 Frequency synthesis using a remodulator |
| 07/07/1998 | US5777574 High resolution imaging radar linear frequency modulation bandwidth multiplier |
| 06/25/1998 | DE19708772A1 Signal frequency generation method |
| 06/23/1998 | US5770977 Microwave frequency synthesizer with ultra-fast frequency settling and very high frequency resolution |
| 06/18/1998 | DE19754203A1 Frequenzerzeugungsschaltung und Betriebsweise Frequency generation circuit and operation |
| 06/16/1998 | US5768693 Method and apparatus for controlling frequency of a multi-channel transmitter |
| 06/09/1998 | US5764087 Direct digital to analog microwave frequency signal simulator |
| 06/02/1998 | US5760622 Frequency converting circuit |
| 05/22/1998 | WO1998021819A1 Generating frequencies for a multimode device of a radio system |
| 05/05/1998 | US5748047 Microwave frequency generator and method of generating a desired microwave frequency signal |
| 04/01/1998 | EP0833483A2 Phase comparator for demodulator using differential detection |
| 03/26/1998 | WO1998012813A1 Adaptive frequency synthesizer for synchronization |
| 03/25/1998 | EP0831625A2 Phase detection circuit and differential detection demodulator |
| 02/10/1998 | US5717350 Degenerated differential pair waveform builder |
| 01/28/1998 | CN1037222C Power saving frequency synthesizer with fast pull-in feature |
| 01/27/1998 | CA2010176C Tuner station selecting apparatus |
| 10/21/1997 | US5680067 Frequency dividing device |
| 09/30/1997 | US5673007 Frequency synthesizer having PLL receiving filtered output of DDS |
| 09/17/1997 | EP0795962A2 Synthesized oscillation circuit |
| 09/10/1997 | CN2262309Y Function change-over module |
| 08/26/1997 | US5661424 Frequency hopping synthesizer using dual gate amplifiers |
| 07/24/1997 | WO1997026710A1 Method and apparatus for selecting from multiple mixers |
| 07/23/1997 | CN2258327Y High-resolution and broadband linear frequency-scanning signal resource |
| 07/15/1997 | US5648736 Frequency converting circuit |
| 06/03/1997 | CA2107632C Local oscillator and its frequency switching method |
| 05/28/1997 | EP0776086A2 Signal generator |
| 04/03/1997 | DE19536732A1 High frequency heterodyne wave generation and transmission apparatus |
| 02/25/1997 | US5606736 Heterodyne radio receiver with plural variable frequency local oscillator signals |
| 01/21/1997 | US5596290 Direct frequency synthesizer having moderate bandwidth |
| 12/05/1996 | WO1996027948A3 Method and apparatus for controlling frequency of a multi-channel transmitter |
| 11/05/1996 | US5572168 Frequency synthesizer having dual phase locked loops |
| 09/12/1996 | WO1996027948A2 Method and apparatus for controlling frequency of a multi-channel transmitter |
| 06/05/1996 | EP0715401A1 Frequency divider |
| 05/28/1996 | US5521533 Apparatus for generating an output signal |
| 05/23/1996 | WO1996015584A1 Improved digital synthesizer |
| 05/21/1996 | US5519359 Microwave oscillator with loop frequency conversion to and signal amplification at an intermediate frequency |