Patents
Sitemap › H03 - Basic electronic circuitry › H03D - Demodulation or transference of modulation from one carrier to another › H03D 7 - Transference of modulation from one carrier to another, e.g. frequency-changing
Patents for H03D 7 - Transference of modulation from one carrier to another, e.g. frequency-changing (7,673)
12/1998
12/29/1998US5854974 Compensated ring mixers
12/23/1998WO1998043400A3 Radio receiver
12/23/1998EP0886376A1 Command protocol for circuits used for receiving microwave signals and device implementing the protocol
12/23/1998EP0885510A1 Method and apparatus for routing a digitized rf signal to a plurality of paths
12/23/1998EP0885492A1 An improved gps receiver utilizing a communication link
12/22/1998US5852784 Multiband mobile unit communication apparatus
12/17/1998DE19724844A1 Multiple microwave balanced mixer, especially double balanced mixer
12/16/1998CN1202069A VTR signal processing circuit
12/16/1998CN1202068A Multi-tap radio frequency modulator
12/09/1998EP0883238A2 Receiver for different frequency bands
12/09/1998EP0883237A1 Radio receiver and method of operation
12/09/1998EP0882331A1 Apparatus and method for digitizing and detecting a received radio frequency signal
12/09/1998CN1201302A Radio receiver of suppressing damping-characteristic of low-frequency signals and method thereof
12/08/1998US5848100 Frequency conversion and modulation circuits
12/08/1998US5847612 Interference-free broadband television tuner
12/08/1998CA2148604C Method of recovering a frequency modulated signal
12/03/1998WO1998054844A1 Centralized channel selection in a distributed rf antenna system
12/02/1998EP0880713A1 Combined gps positioning system and communications system utilizing shared circuitry
12/01/1998US5844939 Low-cost phaselocked local oscillator for millimeter wave transceivers
12/01/1998US5844449 Used in microwave frequency bands and millimeter wave bands
11/1998
11/26/1998WO1998052463A1 Ecg noise detection system
11/26/1998DE19754114A1 Mixer circuit for two signals with oppositely different frequencies
11/26/1998CA2290629A1 Ecg noise detection system
11/25/1998CN1200208A Coplanar mixer assembly
11/25/1998CN1199910A Printed circuit transformer hybrids for mixers
11/24/1998US5842137 Subscriber unit for wireless digital telephone system
11/24/1998US5841396 To calibrate a local oscillator in a mobile gps receiver
11/24/1998US5841388 A/D converter apparatus with frequency conversion function and radio apparatus using the same
11/24/1998US5841326 Integrated oscillation circuit used for frequency conversion circuit
11/19/1998WO1998052292A1 Dual-band radio receiver
11/18/1998EP0878903A2 Radio receiving system
11/18/1998CN1199514A High performance mixer and method of designing same
11/18/1998CN1199468A Combined GPS positioning system and communication system utilizing shared circuitry
11/17/1998US5838031 Low noise-high linearity HEMT-HBT composite
11/17/1998US5837589 Simplified production of monolithic microwave integrated circuit by concurrent formation heterojunction bipolar transistor for the local oscillator and schottky diode for the mixer
11/12/1998WO1998051015A1 Multi-channel base station/terminal design covering complete system frequency range
11/12/1998WO1998051004A1 Double balanced compact mixer using microwave monolithic integrated circuit cold fet quad
11/12/1998CA2259262A1 Double balanced compact mixer using microwave monolithic integrated circuit cold fet quad
11/11/1998EP0877479A1 Low-voltage radio frequency amplifier
11/11/1998EP0877476A1 Down conversion mixer
11/10/1998US5835853 Two band receiver
11/05/1998WO1998049770A1 Differential pair gain control stage
11/05/1998WO1998049768A1 Method and circuit for noise reduction
11/05/1998WO1998036501A3 Paging transmitter
11/04/1998EP0875988A2 Interference suppression in RF signals
11/04/1998EP0875094A1 Method and apparatus for selecting from multiple mixers
11/03/1998US5832376 For use at microwave or millimeter wave frequencies
11/03/1998US5832375 Superheterodyne radio receiver
11/03/1998US5832043 System and method for maintaining continuous phase during up/down conversion of near-zero hertz intermediate frequencies
11/03/1998US5831574 Method and apparatus for determining the location of an object which may have an obstructed view of the sky
10/1998
10/22/1998WO1998047221A1 Low voltage analog front end
10/22/1998WO1998035544A3 System and method for harmonic interference avoidance in carrier recovery for digital demodulation
10/21/1998EP0872021A1 Universal rf receiver
10/21/1998CN1196839A Transmission process in which conversion oscillator signal is synthesised by means of fractional N-phase-shift control loop
10/20/1998US5826183 Circuit for simultaneous frequency doubler and mixer
10/20/1998US5826182 Double balanced RF mixer with predetermined input impedance
10/20/1998US5826180 Near homodyne radio frequency receiver
10/20/1998US5826174 Method and apparatus for improving data transmission over a wireless system by optical spectrum positioning
10/20/1998US5825833 Digital and analog reception apparatus
10/20/1998US5825813 Transceiver signal processor for digital cordless communication apparatus
10/20/1998US5825327 GPS receivers and garments containing GPS receivers and methods for using these GPS receivers
10/20/1998US5825231 Transformer circuit, double-balanced mixer
10/15/1998WO1998045942A2 Receiver and filter arrangement comprising polyphase filters
10/15/1998WO1998045936A1 Frequency doubling of a quadrature-amplitude modulated signal using a frequency multiplier
10/13/1998US5822688 Method for enhancing the reception sensitivity in homodyne recievers
10/13/1998US5822366 Transceiver and method for generating and processing complex I/Q-signals
10/13/1998US5821802 Transformer-coupled mixer circuit
10/13/1998US5821782 Frequency synthesis using a remodulator
10/07/1998EP0868775A1 Frequency agile modulator
10/06/1998US5819169 High performance mixer structures for monolithic microwave integrated circuits
10/06/1998US5818883 Multi-channel digital transceiver and method
10/06/1998US5818381 Electronic viewing aid
10/06/1998US5818305 Automatic substitution of a reference oscillator for synchronizing two transmitter co-channel local oscillators
10/01/1998WO1998043400A2 Radio receiver
10/01/1998WO1998043364A1 A multi-carrier radio system and radio transceiver implementation
09/1998
09/30/1998CN1194505A Radio receiving method and radio receiving apparatus
09/24/1998WO1998042071A1 Radio receiver
09/24/1998DE19810617A1 High frequency transformer hybrid for HF mixer in printed circuit, etc.
09/22/1998US5812605 Multi-channel digital transceiver and method
09/17/1998WO1998040968A2 A frequency conversion circuit
09/17/1998WO1998040966A1 System and method for high speed digital data casting concurrent with amplitude modulated broadcasts
09/17/1998WO1998026576A3 CATV apparatus for tuning channels
09/16/1998EP0865213A2 VTR signal processing circuit
09/16/1998EP0864216A1 Filtering in a receiver that uses log-polar signal processing
09/16/1998EP0864207A1 Coplanar mixer assembly
09/16/1998EP0766833B1 Electronic viewing aid
09/15/1998US5809410 Low voltage RF amplifier and mixed with single bias block and method
09/15/1998US5809409 Balanced mixer, distributer and band rejection filter for use in same, and frequency mixing method
09/09/1998EP0863615A1 Frequency tracking arrangements
09/09/1998CN1192608A Circuit for simultaneous frequency doubler and mixer
09/08/1998US5805988 System and method for switching an RF signal between mixers
09/08/1998US5805987 Double balanced mixer circuit with less power consumption
09/08/1998US5805241 Noise-immune automatic gain control for QAM radio receivers
09/08/1998US5805240 Radio frequency transmitter having circuitry for regulating a mixing frequency adjusting output power, eliminating high frequency abnormalities, preventing audio/visual interference, and controlling output intensity
09/03/1998WO1998038799A1 Direct-conversion tuner integrated circuit for direct broadcast satellite television
09/03/1998WO1998038732A1 Quadrature modulation and demodulation circuit for an oscillating waveform
09/03/1998DE19719658A1 Double transformation HF transceiver apparatus
09/01/1998US5802451 Non-linear compensation circuit for a power amplifier
09/01/1998US5801654 Apparatus and method for frequency translation in a communication device
08/1998
08/26/1998EP0860049A1 Frequency conversion circuit and method for millimeter wave radio
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