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8078108 |
Protocol-controlled antenna selection
The idea on which the present invention is based is that transmitting and receiving data by an antenna or an antenna array may be performed more efficiently by analyzing protocol data of a transmit...
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7647125 |
Time-based control of a system having integration response
A time-based controller provides control for a controlled system including a plant having an integration response. The time-based controller includes a comparator that detects a polarity change in...
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7567632 |
Specific phase position detection circuit and method of the same
A specific phase position detection circuit of the invention includes: a measurement unit that detects two time positions where a signal level of an analog signal is matched with a preset threshold...
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7456740 |
Detector device
The present invention relates to a detector device and, more particularly, to a detector device comprising a self-diagnosis means for monitoring the correct performance or otherwise of the device....
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7400874 |
Integrated circuit comprising a clock-signal generator, smart card comprising an integrated circuit of this kind and associated method for the generation of clock signals
A contactless integrated circuit receiving an RF signal comprises a clock-signal generator to produce a clock signal from a first half wave and a second half wave representing the received RF...
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7019635 |
Method and device for the detection of sources in a communications system
A method for the detection of M0 sources common to several observations u(t) and v(t) within a single array of sensors, the observations having different lengths N1 and N2, comprises at least the...
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6967573 |
Transmitter and a method for transmitting data
A transmitter or a method for transmitting data from a first antenna imposes a low level phase modulation, for example of less than 90°, on a carrier signal in accordance with a data signal to ...
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6911900 |
System and method for electronically signalling along a fence line
A system for electronically signalling along a fence line, comprising one or more transmitter device(s) for connection to the fence line from which control signals or information may be sent along...
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6784785 |
Duplex transmission in an electromagnetic transponder system
A method of transmission between two elements chosen from a terminal and a transponder, each element including an oscillating circuit, a modulator and a demodulator, including simultaneously...
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6515466 |
Phase comparator
A phase comparator for calculating the phase difference between a test wave form and an output wave form in a disk drive includes a phase converter, a first multiplier, a first integrator, a second...
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6469620 |
Method and apparatus for protecting a transmission path between a base unit and a mobile key unit
The invention relates to a method and apparatus for protecting a transmission path between a base unit and a mobile key unit in an access control system, in particular for motor vehicles. A carrier...
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6411199 |
Radio frequency identification system
A radio frequency identification system includes a transponder and a transponder reader. The transponder, responsive to an interrogation signal continuously transmitted by the transponder reader,...
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5734333 |
Device with spectral purity for the remote exchange of information between a portable object and a station
A system for remote information exchange between a portable object and a station and in which in order to minimize an undesirable profitless cluttering in the radio frequency environment of the...
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5099234 |
Switching matrix network for digital audio signals
A switching matrix network provide switching of digital signals of different sampling frequencies by sampling the digital signals at a sampling frequency greater than any digital input signal and...
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5095309 |
Method and apparatus for modulating and detecting a subcarrier signal for an inductively coupled transponder
A transponder system including a transponder and an interrogator having a transmission coil for producing a high-intensity electromagnetic field for inductively powering the transponder and two...
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4563679 |
Carrier control method by using phase-pulse signals
An address discrimination channel and terminal selection channels are established in the low-noise region of a first one of two succeeding cycles of an alternating current carrier wave, whereas...
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4511896 |
Remote sensor system with bi-directional monitoring and control of operation
An improved electronics system for transmission of low level analog signals rom a remote sensor to a control terminal utilizing a single pair of unshielded wires. A bi-directional exchange occurs...
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4438405 |
Frequency discriminating device
A frequency discriminating circuit for readily discriminating between two signals having closely adjacent frequencies in which the effects of drift of circuit elements are eliminated. A frequency...
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4380761 |
Digital phase decoder with collision detection
A data communication system includes a communicating medium and a plurality of transceivers connected to the medium, each including a transmitter for transmitting phase-encoded data onto the medium...
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4358756 |
Alarm transmission system
An alarm transmission system with portable receivers for watching a site, which system comprises a plurality of portable and removable autonomous detection units, a plurality of portable autonomous...
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4067015 |
System and method for tracking a signal source
A system for tracking moving signal sources is disclosed which is particularly adaptable for use in tracking stage performers, although a wide range of other uses is possible. A miniature...
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3835454 |
PLURAL CHANNEL FM REMOTE CONTROL SYSTEM
A system for individually adjusting a plurality of remotely located servo units according to the adjustment of a manual control for each unit by transmitting an FM carrier signal that is broken...
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3810161 |
APPARATUS FOR RECEIVING A FREQUENCY AND PHASE CODED VEHICLE CONTROL SIGNAL
A vehicle control signal, for example a vehicle speed command, is binary coded wherein the message content is frequency coded such that a binary one indication is at a first frequency and a binary...
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3701103 |
REMOTE CONTROL RECEIVER USING A PHASE LOCKED LOOP
A remote control receiver selectively responsive to a plurality of different frequency command signals to control corresponding different command functions. The receiver uses a phase locked loop...
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3626426 |
PHASED LOCKED LOOPS
Apparatus for rapid automatic signal acquisition having multiple phase-locked loops with coherently related output signal frequencies. The first phase-locked loop is responsive to a first input...
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3609663 |
PREDETECTION SIGNAL-PROCESSING SYSTEM
A regenerative signal-processing system in which a multiplicity of incoming signals are combined prior to detection. By heterodyning each incoming signal with a common signal, difference frequency...
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3597735 |
CARRIER PILOT RELAYING SYSTEM
A carrier pilot relaying system in which the current flowing through the power transmission line in each electrical station is detected by a current transformer to be converted into a phase signal...
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3524200 |
MAGNETIC CORE PHASE COMPARISON CIRCUIT
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3488632 |
INFINITELY VARIABLE INDUCTIVE REMOTE CONTROL SYSTEM
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3470536 |
FREQUENCY SENSITIVE APPARATUS
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3299405 |
Signalling system
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3293607 |
Coherent decision making receiver system
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3219975 |
Proportional remote radio control system
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3182292 |
Noise-rejecting counter circuit
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3110862 |
Coherent carrier regenerator
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3099796 |
Phase coded communication system
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3099795 |
Phase coded communication system
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3094696 |
Phase coder alignment system
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3027513 |
Phase identifying and phase angle indicating means
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3008125 |
Signal identification and alignment system
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2989728 |
Traffic and other control systems
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2979566 |
Method and system for transmitting data
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2946043 |
A.c. coding systems for multiple load selection
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2901729 |
Phase-selective control system
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2884516 |
Phase sensitive alternating current track circuit
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2806185 |
Phase and amplitude testing apparatus
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