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8928459 Precision location methods and systems  
Systems and methods are described herein for determining the location of a transmitter by jointly and collectively processing the full sampled signal data from a plurality of receivers to form a...
8274411 Circuit arrangement and method for the operation of a circuit arrangement  
A circuit arrangement (1) comprises a current source (10), a comparator (50) and a control device (90). The current source (10) serves for supplying a light-emitting diode (41). The comparator...
8013761 Switching matrix for an input device  
The invention relates to a switching matrix for an input device such as a keyboard or a cursor device for the detection of different switching states. According to the invention the switching...
7777650 Key system with two operation nodes for detecting status of keys  
A key system utilizes two operation nodes to detect the status of a plurality of keys, and each operation node can output and read a high, a low, and a clock signal. When an operation node outputs...
7719405 Crosspoint switch with low reconfiguration latency  
A method of operating a circuit for processing a digital signal is disclosed. The circuit includes various circuit stages having respective enabled states. A present signal path is established...
7612690 Method and apparatus for scanning a key or button matrix  
An improved key matrix scanning technique conducts a first pre-scan on a first array of connections in a key matrix to identify any activated keys or buttons associated with the first array. A...
7339499 Keypad signal input apparatus  
Keypad apparatus for registering signals corresponding to data that a user enters by pressure on keys of an array in a surface extending in two dimensions. The elements of first and second sets of...
7245606 Switching device comprising a common voltage reference path  
The invention relates to a switching device comprising a plurality of inputs and outputs which are interconnected by an interconnection point matrix for transmitting electric signals supplied from...
7190412 Video switching systems and methods  
Systems and methods for performing video switching between multiple inputs and outputs are disclosed. In one embodiment, a system includes a video box coupled to one or more user interfaces, a...
7161505 A/D converter with comparators and low-power detection mode for resistive matrix keyboards  
An apparatus and method is disclosed for providing a fast, low power consumption, detection of at least one depressed key in a resistive matrix keyboard. The common contact of each row of a...
6995656 Switching device comprising local decoding means  
The invention relates to a switching device comprising a plurality of inputs and outputs which are interconnected by a matrix of interconnection points for transmitting electric signals supplied...
6980135 Logic circuit using hardware to process keyboard scanning  
A logic circuit uses hardware to process keyboard scanning, more especially, a microprocessing system inputs the signal through a pressed key into a control circuit for conducting operation; since...
6965299 High-speed, low-power crossbar switch  
In a crosspoint switch, both input buses and output buses are driven at low swing. Self-timed, differential, push-pull, low swing driver circuits drive the input buses and are provided in the...
6865639 Scalable self-routing superconductor switch  
A crossbar switch includes a cross-point matrix with n input rows of cross-points and m output columns of cross-points. The crossbar switch further includes n decoders connected to the n input...
6850174 Method and apparatus for recognizing key  
A method is provided for recognizing a key in a terminal apparatus having a key matrix structure. The method according to the invention includes the steps of recognizing pushing of and detaching...
6737958 Crosspoint switch with reduced power consumption  
A crosspoint switch architecture implements high-speed packet switches and incorporates a power-saving bias control circuit with each switch cell. Each switch cell is equipped with two memory...
6580359 Selectable input buffer control system  
A selectable input buffer control system includes at least one input buffer; a plurality of input receivers associated with each input buffer; an addresser circuit for addressing each input...
6525650 Electronic switching matrix  
A high density electronic switching matrix (ESM) includes several splitting modules (200) arranged along a first axis, each including a signal input (202) and several splitter outputs (204). The...
6515579 Switching apparatus for routing communication channels through a satellite payload  
Active switch matrix apparatus that is used in a satellite communications system that provides for reconfigurability of the communication channels of the communications system. The active switch...
6509846 Key matrix circuit  
A key matrix circuit has a switching circuit with a first terminal and a second terminal that are switched on and off by pressing a selection key of a plurality of selection keys arranged in an...
6426710 Security keyboard matrix scanning method  
A security keyboard matrix scanning method for a keyboard is disclosed. This invention utilizes bi-directional input/output ports, in which each line of the X-port and the Y-port can be...
6351258 Switcher system and I/O switching method  
The present invention switches an input/output route for each signal, even if types of signals are increased, without installing additional switchers. The present invention provides a...
6307681 Electro-optical device, electronic equipment, and method of driving an electro-optical device  
The present invention provides an electro-optical apparatus which, produce precharge signals PV1 and PV2 to be supplied to a precharge signal line using, for example, a differentiating circuit,...
6198873 Editing system and video signal output system  
An editing system and a video signal output system are disclosed. The inventive system comprises a server for reproducing video signals for a plurality of scenes from disk drives and for...
5929790 Analog to digital converter keypad method and apparatus  
An ADC (analog digital converter) keypad apparatus controls key inputs according to a voltage divided by a plurality of voltage dividing resistors. The ADC keypad apparatus includes an ADC keypad,...
5914677 Apparatus and method for scanning a switch array  
A switch array decoding circuit, suitable for use in a keyboard, and method according to the present invention comprises a matrix of row lines and column lines. Switches from the array are...
5856794 Method and apparatus for scanning keyboard and diode option  
A method and apparatus for improved scanning keyboard and diodes option is disclosed. Each of the pins is treated as one independent dimension so as to define a multi-dimensional configuration....
5631637 Output method for dot data and apparatus therefor  
A data output apparatus is equipped with a wireless data receiving unit, for wireless data reception from an external equipment, and a cable data receiving unit for data reception, through a...
5623519 Apparatus for comparing the weight of a binary word to a number  
A logic circuit (260) includes recursive elements (470, 1070, 1400, 1600) interconnected in a matrix (300), and M data inputs (490), and a logic circuit output (475). In one embodiment, N+1 binary...
5555436 Apparatus for allowing multiple parallel port devices to share a single parallel port  
An apparatus and system which allows multiple parallel port devices to share a single parallel port of a personal computer. The invention uses the parallel port signal called Select-- In which is...
5446370 Method and apparatus for verifying the output of a RF switch matrix utilized in a communication system  
A transceiver (203) instructs a RF switch matrix (200) to direct its output to any one of M outputs and likewise sends information related to the power and frequency of the RF input signal and the...
5319361 Circuit managing numbers of accesses to logic resources  
A circuit managing numbers of accesses to logic resources, such as buffer memory data cells in a time switching system. The circuit is structured around a counting cell matrix including a...
5216420 Matrix sorting network for sorting N inputs onto N outputs  
In a switching system, or the like, an apparatus for sorting N signals has log2 N stages of sorting matrices wherein each stage comprises M (N/2M)-by-(N/2M) matrices of sorting cells and the final...
5210529 Bit finder circuit  
A circuit to find the first bit 0 or 1 in an m-bit input word from a start bit onwards, the positions of these bits being defined by an n-bit code. It includes a crosspoint matrix of m (4) rows...
5017917 Restriction of communication service accessibility among subscriber communities  
Subscribers (100-108) of an electronic mail system (1-2) service are divided into a plurality of subscriber communities (30-34). Subscribers in each community have common rights of access to one...
4978953 Device for monitoring multiple digital data channels  
A device for switching data channel signal lines of each of a number of data channels through modules having interconnection switching matrices, to a further device adapted to monitor the signal...
4970508 System for monitoring switch locations  
A system is provided for electronically monitoring a group of sensor switches employed at remote locations in security or alarm systems. To monitor the status of individual switches, a matrix of...
4965570 Photoelectric conversion apparatus  
A photoelectric conversion apparatus has a plurallity of photoelectric conversion elements each providing an output signal to a storage capacitor. A matrix wiring unit is arranged opposite the...
4821033 Matrix switching apparatus for preventing pseudo input  
A matrix switching apparatus for preventing a pseudo input condition caused by a detour of a signal as well as output of an erroneous signal caused by a noise intruding into an apparatus and the...
4771281 Bit selection and routing apparatus and method  
A bit selection and routing apparatus and method selects m data signals from among its n available data inputs and groups those m signals on its output lines. The apparatus employs a...
4677437 Input signal switching matrix for an elevator  
In this invention, "column" buses connected to a power supply and "row" input lines are arranged in the shape of a matrix, external signal lines are connected to the intersection points thereof,...
4661814 Device for reading out a two-dimensional charge pattern by means of an array  
A device for reading out two-dimensional charge patterns contains a receiver matrix (consisting of elementary transducers arranged in rows and columns) and a switching matrix (consisting of a...
4577191 Matrix control method and apparatus  
A method and an apparatus for controlling a selected electrical use circuit (9) from among a multiplicity thereof from a correspondingly selected electrical control circuit (8) from among the same...
4575708 Decoder of a data from a subgroup of P data belonging to a group of N data  
Being given the number among P of a data, an attempt is made to find the number among N of said data in a group of N data incorporating P selected data. The sequence numbers of these P data appear...
RE32069 Device for detecting a key switch operation  
A device for detecting a key switch operation capable of detecting an operating state of a plurality of key switches which are commonly connected with respect to each row line (block line) at one...
4533914 Remotely controlled crossconnection system  
A DTMF encoder at a central office is connected to a spare pair of a feeder cable for remotely controlling with a 5-digit number a series of relay coil matrices where the coils perform latch and...
4455617 Multiple simultaneous tone decoder  
The invention is a decoder for decoding serially received signals. The decoder includes circuitry for calculating the period of each signal in a group of the serially received signals. The decoder...
4429301 Means for decoding a switch array  
Crossbar switch array employs two linear conductors having resistors thereon, with horizontal and vertical crossbar conductors connected to linear conductors between the resistors. All resistors...
4412218 Remote control signal transmitter capable of setting custom codes individually alloted to a plurality of controlled instruments  
A remote control signal transmitter generates a scan signal. A plurality of scan signal output terminals convey the scan signals to a key matrix circuit having a plurality of column lines and a...
4406995 Base station for monitoring call boxes  
In a base station for monitoring the status of several function conditions at remote call boxes, each box of which is assigned a distinctive identification code and is capable of selecting and...

Matches 1 - 50 out of 149 1 2 3 >