| Patents for H03D 7 - Transference of modulation from one carrier to another, e.g. frequency-changing (7,673) |
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| 11/01/1994 | US5361407 Double superheterodyne receiver with independent frequency calibration of two local oscillators |
| 10/26/1994 | EP0621683A2 Dual mode radiotelephone terminal |
| 10/20/1994 | CA2120982A1 Spur cancellation system |
| 10/11/1994 | US5355534 Frequency mixing circuit having automatic gain control function |
| 10/11/1994 | US5355533 Method and circuit for radio frequency signal detection and interference suppression |
| 10/11/1994 | US5355532 Television tuner unit having shield housing |
| 10/11/1994 | US5355101 Quadrature modulator having circuit for correcting phase error |
| 10/04/1994 | US5352885 Frequency converter for varying the frequency of a local signal over a wide band |
| 09/15/1994 | WO1994021032A1 Balancing mixer, distributor and band blocking filter used therefor, and method for mixing frequencies |
| 09/08/1994 | DE4306578A1 Method for receiving RF signals using a double heterodyne receiver |
| 09/07/1994 | EP0614268A1 Method and apparatus for producing a difference signal between signal frequencies, and for detection of modulation |
| 09/06/1994 | US5345239 High speed serrodyne digital frequency translator |
| 08/30/1994 | US5343171 Circuit for improving carrier rejection in a balanced modulator |
| 08/30/1994 | US5343097 Phase comparator circuit and phase locked loop (PLL) circuit using the same |
| 08/17/1994 | EP0610564A2 Dual gate fet and circuits using dual gate fet |
| 08/16/1994 | US5339462 Broadband mixer circuit and method |
| 08/16/1994 | US5339458 Frequency converter unit for use in a high-frequency receiver |
| 08/10/1994 | EP0609735A1 Frequency converter |
| 08/03/1994 | EP0608815A1 Integrated image rejection frequency converter |
| 08/02/1994 | US5335354 Demodulation circuit having automatic frequency control function |
| 07/27/1994 | CA2110073A1 Dual gate fet and circuits using dual gate fet |
| 07/26/1994 | CA2016901C Channel frequency generator for use with a multi-frequency output generator |
| 07/21/1994 | WO1994016502A1 Method and apparatus for reducing local oscillator leakage in integrated circuit receivers |
| 07/13/1994 | EP0606094A2 Monolithic microwave integrated circuit |
| 07/12/1994 | US5329189 Mixer circuit |
| 07/07/1994 | WO1994015409A1 Frequency control system |
| 06/28/1994 | US5325129 Millimeter wavelength energy detector pixel having intermediate frequency amplification |
| 06/28/1994 | US5325000 Frequency mixing circuit with impedance transforming power combiner |
| 06/27/1994 | EP0623259A4 An integrated circuit including a surface acoustic wave transformer and a balanced mixer. |
| 06/23/1994 | WO1994014247A1 Circuit for generating signals in phase quadrature and associated method therefor |
| 06/21/1994 | US5323123 Integrated circuit having a variable-gain amplifier |
| 06/14/1994 | US5321738 Switch apparatus of a portable cordless telephone using an antenna |
| 06/09/1994 | DE4240492A1 Microwave propagation time measurement appts. - has receiver with compensation circuit forming sink for integrating echo signals in receiver |
| 06/07/1994 | US5319267 Frequency doubling and mixing circuit |
| 06/01/1994 | EP0599414A2 A direct conversion receiver |
| 06/01/1994 | EP0599409A2 A direct conversion receiver |
| 05/31/1994 | US5317282 Tetrode biasing circuit |
| 05/25/1994 | EP0598585A2 Automatic calibration of the quadrature balance within a cartesian amplifier |
| 05/24/1994 | US5315136 Double-balanced mixer |
| 05/17/1994 | US5313170 Differential detection demodulator |
| 05/17/1994 | CA1329640C Outdoor unit low noise converter for satellite broadcast reception use |
| 05/10/1994 | US5311318 Double conversion digital tuning system using separate digital numbers for controlling the local oscillators |
| 05/10/1994 | US5311151 I/Q modulator and demodulator having a single bridge |
| 05/10/1994 | US5311149 Integrated phase locked loop local oscillator |
| 05/10/1994 | US5311142 Amplifier circuit with gain that does not vary with power supply fluctuations |
| 05/10/1994 | US5311086 Multiplying circuit with improved linearity and reduced leakage |
| 05/04/1994 | CN1086357A Transformer circuit, double-balanced mixer |
| 05/03/1994 | US5309479 Low Cost Ku band transmitter |
| 05/03/1994 | CA2050756C Modulator using low-pass filter as delay element |
| 04/27/1994 | EP0346495B1 Television tuner |
| 04/26/1994 | US5307518 Double-balanced mixer |
| 04/26/1994 | US5306969 Frequency mixer circuit using FETs |
| 04/19/1994 | US5304794 Method for mixing optical and microwave signals using a GaAs MESFET |
| 04/12/1994 | US5303419 Aperture-coupled line Magic-Tee and mixer formed therefrom |
| 04/12/1994 | US5303418 High isolation mixer |
| 04/12/1994 | US5303417 Mixer for direct conversion receiver |
| 04/12/1994 | US5302864 Analog standard cell |
| 04/06/1994 | EP0590191A1 Circuit for frequency conversion |
| 04/05/1994 | US5301367 Direct digital synthesizer for producing a modulated intermediate frequency in a radio apparatus |
| 03/23/1994 | EP0588444A1 Modulation system capable of accurately compensating for nonlinearities of an amplifier connected thereto |
| 03/16/1994 | EP0587136A2 Mixer circuit |
| 03/16/1994 | EP0587129A1 Receiver for digital mobile communications |
| 03/12/1994 | CA2105145A1 Receiver for digital mobile communications |
| 03/12/1994 | CA2104542A1 Mixer circuit |
| 03/02/1994 | EP0584870A1 Transformer circuit, double-balanced mixer |
| 03/01/1994 | US5291474 Procedure for forming frequencies of a digital radio telephone |
| 03/01/1994 | US5291201 Microwave integrated circuit frequency translating apparatus |
| 02/24/1994 | DE4303903A1 Radio receiver for SSB reception from DSB AM transmitter - provides equalising compensation by removing interference from DSB oscillation to be evaluated from mixt. or DSB oscillations |
| 02/22/1994 | US5289505 Frequency translation apparatus and method |
| 02/09/1994 | EP0582176A1 Even order term mixer |
| 02/02/1994 | EP0581573A1 Universal radio telephone |
| 02/02/1994 | EP0581572A1 Method and system for frequency converting |
| 01/26/1994 | EP0580294A2 Automatic frequency control circuit |
| 01/19/1994 | EP0528848B1 Frequency converter for a radio communications system |
| 01/18/1994 | US5280648 Double-balanced high level wide band RF mixer |
| 01/18/1994 | US5280647 Double-balanced mixer with triple-layer film transformers |
| 01/18/1994 | US5280644 Frequency control circuit, and associated method, for a receiver operative to receive signals-transmitted thereto in intermittent bursts |
| 01/18/1994 | US5280290 Self-oscillating mixer circuits, and FMCW radar |
| 01/12/1994 | EP0577887A1 Low voltage differential circuit |
| 01/11/1994 | US5278837 Multiple user digital receiver apparatus and method with combined multiple frequency channels |
| 01/04/1994 | US5276904 Antenna system |
| 01/04/1994 | US5276734 Oscillator system |
| 01/04/1994 | US5276450 Phase coherent heterodyne anti-jam method and apparatus |
| 12/29/1993 | EP0576078A1 FM receiver |
| 12/15/1993 | EP0574273A1 A receiver compriser a combined AM-FM demodulator |
| 12/14/1993 | US5270824 AGC circuit for double conversion digital television tuner |
| 12/08/1993 | EP0573247A1 Television receiver for terrestrial broadcasting |
| 11/23/1993 | US5265269 Intermediate frequency independent star mixer |
| 11/23/1993 | US5265268 Image recovery mixer |
| 11/23/1993 | US5265267 Integrated circuit including a surface acoustic wave transformer and a balanced mixer |
| 11/23/1993 | US5265266 Resistive planar star double-balanced mixer |
| 11/23/1993 | CA1324642C Modem for rf subscriber telephone system |
| 11/18/1993 | EP0570125A1 Unbalanced-balanced converter as a mixer input circuit |
| 11/17/1993 | CN1078582A Frequency mixer circuit using fets |
| 11/16/1993 | US5263198 Resonant loop resistive FET mixer |
| 11/16/1993 | US5263197 Dual port oscillator for two-stage direct conversion receiver |
| 11/16/1993 | US5263195 Superheterodyne radio receiver with digital automatic frequency control for a local oscillator |
| 11/16/1993 | US5263193 Selfmixing heterodyne system |
| 11/16/1993 | US5263182 Low-noise block converter for a satellite broadcasting system |
| 11/16/1993 | CA2004236C Heterodyne stage having precise closed-loop control of the amplitude of the injection signal thereof |