Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 1 - Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission
Patents for H04B 1 - Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission (188,568)
12/1984
12/27/1984CA1180054A Double phase lock loop arrangement
12/25/1984US4490854 Transistor mixer for ultra-high frequency transmitters
12/25/1984US4490838 Muting circuit for AM stereophonic receiver
12/25/1984US4490831 Digital pulse detector circuit having selectable false alarm rate
12/25/1984US4490829 Detection of angular modulated electromagnetic signals
12/25/1984US4490813 Frequency determining apparatus for a synthesized radio
12/25/1984US4490688 Digital and analog phase detector for a frequency synthesizer
12/19/1984EP0128617A1 Squelch circuit for an AM/FM radio receiver
12/18/1984US4489433 Speech information transmission method and system
12/18/1984US4489413 Apparatus for controlling the receive and transmit frequency of a transceiver
12/18/1984US4489285 Signal processing circuit employing an improved composite current mirror circuit/device
12/18/1984CA1179758A1 Operating panel
12/18/1984CA1179739A1 Intermodulation cancelling mixer
12/18/1984CA1179736A1 Radio transmitter modulation control circuitry
12/12/1984EP0127792A2 Receiver
12/12/1984EP0127743A2 Light detecting circuit
12/11/1984US4488273 Magnetic reproducing apparatus capable of receiving radio broadcast programs
12/11/1984US4488179 Television viewing center system
12/05/1984EP0127341A2 Video signal recording and reproducing system with automatic channel and time selection
12/04/1984US4486898 Amplitude limiter for AM broadcast transmitter
12/04/1984US4486852 Synchronous time-shared data bus system
11/1984
11/28/1984EP0126340A2 Input circuit having at least two input paths
11/27/1984US4485487 Method of, and a receiver for, demodulating a double sideband amplitude modulated signal in a quasi-synchronous area coverage scheme utilizing sideband diversity
11/27/1984US4485484 Signal processing arrangement for reducing audio interference
11/27/1984US4485483 FM Stereophonic system incorporating companding of difference signal
11/27/1984US4485477 Fast frequency/code search
11/27/1984US4485360 Apparatus for and method of impedance matching
11/27/1984US4485357 Circuit for amplitude and phase modulation of carrier signal by two respective input signals
11/27/1984US4485355 Switched geometry oscillator
11/27/1984US4485341 Current limiter circuit
11/27/1984US4485277 Apparatus for transmitting and/or receiving balanced signals on a two-wire telecommunication line
11/27/1984CA1178663A1 Portable radio communication device having signal processing circuit with presetting function
11/21/1984EP0125717A1 Broadcast receiver with automatic broadcast station storage
11/20/1984US4484358 Receiver having switched capacitor filter
11/20/1984US4484355 Handheld transceiver with frequency synthesizer and sub-audible tone squelch system
11/20/1984US4484335 Method and apparatus for despreading a spread spectrum signal at baseband
11/20/1984US4484153 Voltage converter for a frequency synthesizer
11/20/1984CA1178341A1 Circuit for processing angle modulated broadcast signals
11/20/1984CA1178340A1 Circuit for demodulating amplitude and angle modulated broadcast signals
11/20/1984CA1178210A1 Noise reduction circuit
11/14/1984EP0124949A1 Mixer arrangement comprising first and second quadrature mixer stages
11/14/1984EP0124728A1 Voice messaging system with pitch-congruent baseband coding
11/13/1984CA1177986A1 Balanced current multiplier circuit for a subscriber loop interface circuit
11/13/1984CA1177985A1 Electronic terminator circuit
11/13/1984CA1177759A1 Circuit arrangements for modifying dynamic range
11/07/1984EP0124332A2 A double conversion tuner
11/07/1984EP0124331A2 Remote control transmitter arrangement for one or more television devices
11/07/1984EP0124316A1 Frequency discriminators
11/06/1984US4481674 Sleep switch volume control
11/06/1984US4481673 RF Prom tracking for tuners
11/06/1984US4481640 Spread spectrum modem
10/1984
10/30/1984US4480338 For use in a multichannel communications receiver
10/30/1984US4480337 Transistor mixer and amplifier input stage
10/30/1984US4480335 Noise removing apparatus in an FM receiver
10/30/1984US4480327 Single channel duplex communication system
10/30/1984US4480253 Wrist watch weather radio
10/24/1984EP0122854A1 Decoupling device for transmitting and receiving channels in a radar using a single aerial
10/24/1984EP0122657A1 Receiver for RF signals comprising a pair of parallel signal paths
10/24/1984EP0122548A2 Remote control apparatus for the wireless control of various devices
10/24/1984EP0122538A1 Superheterodyne receiver
10/24/1984EP0020640B1 High efficiency, light weight audio amplifier and power supply
10/23/1984US4479262 Static audio-frequency control receiver
10/23/1984US4479261 Battery saving circuit for paging receiver
10/23/1984US4479257 Superheterodyne circuit having variable bandwidth and center frequency shift function
10/23/1984US4479252 Device for reduction of the false alarm ratio and monitor receiver comprising such a device of this nature
10/23/1984US4479250 Communications receiver squelch circuit
10/23/1984US4479227 Auto-balance method and apparatus for suppression of residual lines in a transmitted spectrum
10/23/1984US4479226 Communication system
10/23/1984US4479213 Transmission method for transmitting voice and data information over telephone line and device for implementing said method
10/23/1984CA1176767A1 Receiver provided with a frequency synthesizer capable of storing fine tuning information
10/23/1984CA1176718A1 Amplifier
10/17/1984EP0122186A1 Microwave generator
10/17/1984EP0122007A1 Loop transmission system
10/16/1984US4477919 Range control circuit for counter to be used in a frequency synthesizer
10/16/1984US4477900 Digital communications system
10/16/1984CA1176336A1 Noise blanker which tracks average noise level
10/10/1984EP0121508A2 A method to influence an audio source during telephone operation, and a device for utilization of the method
10/09/1984US4476584 Digital frequency lock tuning system
10/09/1984US4476583 Electronic tracking for tuners
10/09/1984US4476582 Mobile broadcast receiver with channels selectable according to reception location
10/09/1984US4476579 Electronic tuning radio receiver
10/09/1984US4476578 Device for detecting the optimum anode load impedance of a tube transmitter in a high frequency transmission chain
10/09/1984US4476575 Radio transceiver
10/09/1984US4476539 Transversal type smear-desmear filter
10/09/1984US4476502 Noise reduction system
10/09/1984CA1175909A1 Zone switching system for a frequency synthesized transceiver
10/03/1984EP0120543A1 Tunable receiver input circuit
10/03/1984EP0120345A2 Remote control apparatus controlling various functions of one or more devices
10/03/1984EP0120162A2 Electronic identification system
10/02/1984US4475246 Simulcast same frequency repeater system
10/02/1984US4475245 Transceiver
10/02/1984US4475242 Microwave communications system
10/02/1984US4475231 Multi-unit audio connecting system
10/02/1984US4475215 Pulse interference cancelling system for spread spectrum signals utilizing active coherent detection
10/02/1984US4475214 CW Interference cancelling sytem for spread spectrum signals utilizing active coherent detection
10/02/1984US4475208 Wired spread spectrum data communication system
10/02/1984US4475153 Method and apparatus for automatic control of electronic equipment
10/02/1984CA1175586A1 Television frequency synthesizer for nonstandard frequency carriers
10/02/1984CA1175491A1 Phase locked loop tuning system including a prescaler conditioned to oscillate at an out-of-band frequency
10/02/1984CA1175489A1 Receiver for am stereo signals having a circuit for reducing distortion due to overmodulation
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