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7414424 Directional power detection by quadrature sampling  
Power measurement and control in transmission systems are affected by changes in load conditions. A method and system are provided for detecting and controlling power levels independent of such...
7398063 System and method for detecting Radio Frequency signals over a range of powers  
The present invention is directed to a power detection circuit for use in a wireless transmitting device. The circuit makes use of multiple gain paths so that two or more scaling factors are...
7353007 Digital transmission circuit and method providing selectable power consumption via multiple weighted drive slices  
A digital transmission circuit and method providing selectable power consumption via multiple weighted driver slices improves the flexibility of an interface while reducing transmitter power...
7327107 System and methods for automatically moving access barriers initiated by mobile transmitter devices  
An operator system and related methods for automatically controlling access barriers which includes a base controller associated with at least one access barrier and at least one base receiver...
7317902 Successive log video pad power detector and method  
A power detector which samples the output signal from a communications device and produces a control signal proportional to the transmit power level, comprising a series of diode detectors where...
7269416 Universal vehicle based garage door opener control system and method  
A vehicle-based control system and method for use with a barrier operating system that includes a motor, a receiver in communication with the motor, and a remote transmitter for transmitting an...
7269397 Method and apparatus for measuring communications link quality  
A method and apparatus for measuring communications link quality provides accurate on-chip estimation of the difficulty of achieving a particular bit error rate (BER) for a communications link. A...
7236745 Transceiver power detection architecture  
A detector module is described wherein the detector module includes a housing with a conductive waveguide, a detector, a temperature sensor, and detector circuitry. The waveguide is made of a...
7228114 Wide dynamic range power detection scheme  
A power detection circuit is described that provides for a wide dynamic range power detection. The circuit incorporates a coupler to sample a transmitted or received power. Such sampled power is...
7221181 Directional power detection by quadrature sampling  
Power measurement and control in transmission systems are affected by changes in load conditions. A method and system are provided for detecting and controlling power levels independent of such...
7183941 Bus-based appliance remote control  
The present invention provides a universal remote control with components interconnected by a bus, permitting separate location of the components. During operation, a control input is received from...
7183940 Radio relay appliance activation  
Remote appliance activation can be achieved by relaying between radio frequency transmission schemes having different characteristics. A radio receiver receives radio frequency control signals for...
7167076 Universal garage door operating system and method  
A universal garage door operating system and method. In one embodiment, a vehicle transmitter is provided transmitting a wireless garage door transmitter control signal. A control module is...
7164285 Directional power detection by quadrature sampling  
Power measurement and control in transmission systems are affected by changes in load conditions. A method and system are provided for detecting and controlling power levels independent of such...
7161466 Remote control automatic appliance activation  
A programmable remote control automatically learns characteristics necessary to generate an appliance activation signal. A sensor is positioned proximate to the appliance. A sequence of different...
7135957 Universal garage door operating system and method  
A universal garage door operating system and method. In one embodiment, a vehicle transmitter is provided transmitting a wireless garage door transmitter control signal. A control module is...
7133654 Method and apparatus for measuring communications link quality  
A method and apparatus for measuring communications link quality provides accurate on-chip estimation of the difficulty of achieving a particular bit error rate (BER) for a communications link. A...
7120430 Programmable interoperable appliance remote control  
A universal remote control establishes a new transmitter identifier when programmed to a particular rolling code scheme by an existing transmitter. During programming, the universal remote control...
7116242 Programmable transmitter and receiver including digital radio frequency memory  
A vehicular programmable transceiver includes a digital radio frequency memory (DRFM) having at least one register configured to sample and hold a radio frequency input signal in response to a...
7106604 System and method for reducing transfer function ripple in a logarithmic RMS-to-DC converter  
An RMS-to-DC converter system is disclosed. The system includes a variable gain amplifier having transfer function ripple that receives an input signal and provides an amplifier output signal, a...
7088218 Wireless appliance activation transceiver  
A universal remote control transmits one of a plurality of sequences of activation signals when activated. The remote control includes a receiver and a transmitter. At least one wireless channel is...
7084781 Programmable vehicle-based appliance remote control  
A universal in-vehicle remote control automatically assists in appliance activation configuration. The appliance responds to a radio frequency activation signal having characteristics represented...
7068181 Programmable appliance remote control  
A universal remote control is provided. For each channel supported, a mode is initially established as rolling mode. For a fixed code appliance, a fixed code is received and stored, and the mode...
7050794 User-assisted programmable appliance control  
A universal remote control interacts with a user to assist in training to one or more appliances. If the appliance is activated by a rolling code activation signal, a sequence of different rolling...
7039397 User-assisted programmable appliance control  
A universal remote control interacts with a user to assist in training to one or more appliances. If the appliance is activated by a rolling code activation signal, a sequence of different rolling...
6978126 Transceiver with closed loop control of antenna tuning and power level  
A trainable transceiver for learning and transmitting an activation signal that includes an RF carrier frequency modulated with a code for remotely actuating a device, such as a garage door opener....
6920334 Method and apparatus for providing gain control feedback in RF amplifiers  
Methods and apparatus for providing gain control feedback in rf amplifiers in such transmitting devices as cell phones. In a cell phone application, the transmit level is set by the base station....
6807403 Radio telephone apparatus  
A voltage control variable attenuator takes a structure using a feedback loop which allows a signal modulated by a modulator to be attenuated based on a comparison result from a comparator. A power...
6633751 System for a dual feedback translation loop for power amplifier feedback control  
A system for controlling a power amplifier using a dual feedback translation loop uses the output of the translation loop during a first time period where a power amplifier has insufficient power...
EP1052777B1 Amplifying circuit device  
Abstract not available
EP1299922A2 SUCCESSIVE LOG VIDEO PAD POWER DETECTOR AND METHOD  
Abstract not available for EP1299922
EP1151534B1 METHOD AND ARRANGEMENT FOR REGULATING THE POWER OF A TRANSMIT AMPLIFIER  
Abstract not available for EP1151534 Abstract of corresponding document: WO0048311 The aim of the invention is to reliably regulate the power of a transmit amplifier within a power range which is...
6466772 Apparatus and method for improving power control loop linearity  
A closed loop power amplifier control system is provided. A self-adapting driver circuit is used to drive the power amplifier in accordance with the feed back error signal. The driver circuit...
6426675 Method and arrangement for controlling the power of a transmission amplifier  
A method and arrangement for controlling the power of a transmission amplifier reliably within as wide a power band as possible, for a desired transmission power level which is less than a...
6370364 Mobile station having power control loop offset alignment without requiring RF power measurement  
A method for determining a calibration value for a RF power control loop. The RF power control loop includes an error amplifier ( 30 ) having an output for outputting an indication (EAO) of a...
EP0639890B1 Directional detector for power level control  
Abstract of EP0639890 Disclosed is power level adjusting apparatus for a data transmission system of the type having a power amplifier means (12) for providing a modulated output signal. A...
EP0718969B1 Power controller for RF transmitters  
Abstract of EP0718969 The present invention provides an RF transmitter network for cellular telephone systems. The network includes power amplifier circuitry (14) which is coupled (via 22) to a...
6216012 Dualband power amplifier control using a single power amplifier controller  
A system having dualband power amplifier control in a dualband phone is provided using a single power amplifier controller. The dualband phone includes two power amplifiers, where each power...
6154664 Dual band cellular phone with two power amplifiers and power control circuit therefore  
A transmitter for a cellular phone comprising an antenna and being operable at a first radio frequency band and a second radio frequency band is disclosed. The transmitter comprises a first power...
EP1052777A2 Amplifying circuit device  
Abstract not available
6108527 Wide range multiple band RF power detector  
The specification relates to a radio frequency (RF) power detection circuit for multiple frequency bands. One embodiment of the present invention uses semiconductors as power detection sensors and...
6035181 Apparatus and method for maximizing transmit power output  
An apparatus (10) and method (100) optimize the transmit output power of a power amplifier (14) while providing for controlled backoff independent of temperature, gain stackup or other common error...
6012329 Method and apparatus for testing tires on a motor driven roller set  
In the tire examination method before and after an alteration in the tire pressure a respective interferogram is produced of the tire surface using coherent radiation and the interferogram is...
6002922 Method and apparatus for detecting communication signals  
A unique method and apparatus for detecting the power level of communication signals, such as RF communication signals being transmitted from a wireless communication device (100), increases the...
5903326 Trainable RF system for remotely controlling household appliances  
A control system selectively controls the operation of at least one lamp and at least one garage door opener. The control system includes a control module. The control module includes connectors...
5903226 Trainable RF system for remotely controlling household appliances  
A control system selectively controls the operation of at least one lamp and at least one garage door opener. The control system includes a control module. The control module includes connectors...
5862461 Transmitting apparatus and method of adjusting gain of signal to be transmitted, and receiving apparatus and method of adjusting gain of received signal  
A transmitting apparatus which can suppress unnecessary power consumption. An optimal signal line is selected from a plurality of signal lines (53-56) having different gains provided by respective...
5854593 Fast scan trainable transmitter  
A trainable transmitter for learning the characteristics of a received RF signal and for transmitting a coded RF signal having the learned characteristics to a receiver for remote activation of a...
5826177 Radio transmitter  
A variable gain amplifier of a transmitter is controlled to obtain optimum transmission power by using a directional coupler and a detector to detect the transmission signal level that is then...
5793300 Trainable RF receiver for remotely controlling household appliances  
A control system selectively controls the operation of at least one lamp and at least one garage door opener. The control system includes a control module. The control module includes connectors...
Matches 1 - 50 out of 78 1 2 >