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)
12/1985
12/24/1985US4560843 Electronic external line repeater
12/20/1985CN85102233A Carrier telephone plants for subscriber's high frequency loop circuif
12/18/1985EP0164962A2 Data transmission using a transparent tone-in band system
12/17/1985US4559633 Spread spectrum system
12/17/1985US4559503 Amplifier for correcting group time delay of electrical signals and an intermediate frequency amplifier stage for radio equipment comprising an amplifier of this kind
12/17/1985CA1198181A1 Phase synchronizing circuit
12/17/1985CA1198167A1 Cw interference cancelling system for spread spectrum signals
12/11/1985EP0036431B1 Transmitter having a phase-locked loop
12/10/1985US4558453 Synchronization method and frequency hopping communication system
12/10/1985US4558185 Subscriber line interface circuit with complex impedance
12/05/1985WO1985005517A1 Apparatus for transmitting digital signals
12/05/1985WO1985005516A1 Single sideband communications system and method
12/04/1985EP0163372A2 Surface acoustic wave device for data rate reduction
12/04/1985EP0163322A2 SCPC communication system including a voice-activated transmission power controller
12/04/1985EP0163311A2 Hot standby communications system
12/04/1985EP0163298A2 PCM coder/decoder with two-wire/four-wire conversion
12/04/1985EP0163281A2 Method for switching between redundant communication channels
12/04/1985EP0162943A1 Integrated circuit for decoding traffic radio announcement identification signals
12/03/1985US4556989 Radio system
12/03/1985US4556988 Indoor unit of receiver for broadcasting satellite
12/03/1985CA1197640A1 Equipment for wireless telephone transmission
12/03/1985CA1197578A1 Electromagnetic wave switch
12/03/1985CA1197562A1 Enhanced selectivity signal receiver
12/03/1985CA1197561A1 Satellite broadcast signal receiving system
12/03/1985CA1197559A1 Frequency modulation transmitter circuit arrangements for voice or data
11/1985
11/27/1985EP0162506A1 Receiving arrangement for HF signals
11/27/1985EP0162136A2 Radio apparatus for a multitude of channels
11/26/1985US4555671 Circuit for driving a signal meter for a receiver
11/26/1985CA1197328A1 Multipath interference reduction system
11/21/1985EP0161944A2 Image suppression mixer of the waveguide type
11/21/1985EP0161779A1 Identification systems
11/21/1985EP0161545A1 Apparatus for locating persons for an electronic timepiece
11/21/1985EP0161512A1 Program identification system
11/21/1985EP0085820B1 Method for multi-speed digital transmission and apparatus for carrying out said method
11/19/1985US4554679 Noise reduction system for a single sideband multiplex signal
11/19/1985US4554678 Wireless receiver having crystal filter at outputs of preamplifier
11/19/1985US4554614 Electric circuit assembly comprising a printed wiring board
11/19/1985US4554542 Guard tone capture method
11/19/1985US4554508 Carrier detection circuit
11/19/1985US4554416 Low voltage two wire to four wire telephone circuit converter apparatus
11/19/1985CA1197029A1 Frequency determining apparatus for a synthesized radio
11/19/1985CA1197014A1 Speech detector capable of avoiding an interruption by monitoring a variation of a spectrum of an input signal
11/19/1985CA1196976A1 Loop transmission system and method of controlling the loop-back condition thereof
11/19/1985CA1196966A1 Interference wave detection circuit for use in radio receiver
11/19/1985CA1196965A1 Programmable clock radio having nap and sleep type features
11/13/1985EP0161027A2 Power control for radio transmitters
11/13/1985EP0029027B1 Antenna low-noise q spoiling circuit
11/12/1985US4553266 R.F. Circuit arrangement
11/12/1985US4553250 Signal transmission system
11/12/1985US4553247 Telemetry system with signal booster for digital data transmission through a transmission line
11/12/1985US4553233 Multiple-ring communication system
11/12/1985US4553105 Multistage linear amplifier for a wide range of input signal levels
11/12/1985US4553101 Fast frequency hopping demodulation system with serial accumulation of signal
11/07/1985WO1985004995A1 Extended threshold analog to digital conversion apparatus for an rf receiver
11/06/1985EP0160484A2 FM receiver including a baseband PLL circuit
11/06/1985EP0160464A2 Method of and apparatus for determining time origin of timer for modem
11/05/1985US4551855 Radio communications system for detecting the coincidence of decoded information
11/05/1985US4551854 Anti-blocking device including stuck microphone reliever for aircraft voice communication system
11/05/1985US4551853 Apparatus for processing speech in radioelectric transmitter/receiver equipment suitable for transmitting and receiving speech
11/05/1985US4551714 Remote control apparatus for audio systems
11/05/1985CA1196386A1 Battery saving circuit for paging receiver or the like
11/05/1985CA1196385A1 Apparatus for improving the frequency stability of a transmitter oscillator circuit
11/05/1985CA1196380A1 Impedance measurement in 4-wire to 2-wire converters
10/1985
10/30/1985EP0159720A2 Bidirectional digital signal communication system
10/30/1985EP0159670A2 Radio communication device and method of controlling transmitter output power
10/29/1985US4550423 Stereo MPX circuit
10/29/1985US4550414 Spread spectrum adaptive code tracker
10/29/1985US4550222 Process for interception-protected frequency band compressed transmission of speech signals
10/29/1985CA1196061A1 Sleep switch volume control
10/29/1985CA1195934A1 Motorcycle audio system
10/22/1985US4549312 Radio receiver with automatic interference and distortion compensation
10/22/1985US4549309 Radio transmitting and receiving apparatus
10/22/1985US4549303 Multichannel time division multiplexed trunk transmission link
10/15/1985US4547902 Radio receiver comprising a frequency locked loop with audio frequency feedback, and a muting circuit
10/15/1985US4547741 Noise reduction circuit with a main signal path and auxiliary signal path having a high pass filter characteristic
10/15/1985US4547728 RF Wattmeter
10/15/1985CA1195446A1 Electronic impedance-matched line repeater
10/15/1985CA1195388A1 Superregenerative radio receiver
10/15/1985CA1195387A1 Noise reduction circuit
10/09/1985EP0157692A2 Code division multiplexer using direct sequence spread spectrum signal processing
10/09/1985EP0157412A2 Radio communication system
10/09/1985EP0156826A1 Telephone transmission installation.
10/08/1985US4546326 Fast automatic gain control arrangement
10/08/1985US4546267 Modular equipment connection
10/08/1985CA1195018A1 Line circuit
10/08/1985CA1194932A1 Frequency synthesizer
10/02/1985EP0156765A1 Radio-system for transmitting data signals independently of speech signals from plural substations to a main station
10/02/1985EP0156651A2 Remote control transmitter
10/02/1985EP0156487A1 Amplifier circuit for radio receiver
10/02/1985EP0156297A2 Mobile apparatus for radio transmission
10/01/1985US4545074 Fiber optic loop system with bypass mode
10/01/1985US4545072 Method and apparatus for eliminating interference due to spurious signals generated in synthesized receivers
10/01/1985US4545061 Synchronizing system
10/01/1985US4545059 Broadband communications system
10/01/1985US4544923 Microprocessor self-turn-off arrangement for a consumer instrument
10/01/1985US4544899 Controlled power line filters for suppressing interference
10/01/1985CA1194571A1 Error source excluding data transmission system
10/01/1985CA1194562A1 Multi-port combiner for multi-frequency microwave signals
10/01/1985CA1194426A1 System for maximum efficiency transfer of modulated signals utilizing line systems
09/1985
09/26/1985WO1985004298A1 Data and voice communications system
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