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Class 370/284 - Differential


Subclass of Class 370 - Multiplex communications
Definition: Subject matter wherein a signal is subtracted from a composite
No. of patents: 95
Last issue date: 03/15/2011


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NumberTitleIssue Date
7907555RSSI-based powerdown apparatus and method for a wireless communications system
A wireless receiver generates quadrature baseband signals which are sampled by a high speed analog to digital converter (IQ ADC) and also uses a receive signal strength indicator (RSSI) which is sampled by an RSSI analog to digital converter (RSSI ADC). The RSSI ADC...
03/15/2011
7804793SAS diplex communications
A relatively low frequency signal—e.g. RS-232—is coupled to and extracted from a communication link that carries both a high frequency continuous signal and burst mode signal having bursts occurring at one or more frequencies—e.g. SAS with OOB signaling. The c...
09/28/2010
7746811Time shared bi-directional serial signaling system
A time shared bi-directional serial signaling system providing a differential signal with apparent duplex signal operation for higher and lower bandwidth data signals in a forward direction and another lower bandwidth data signal in a return direction. ...
06/29/2010
7733815Data sampler including a first stage and a second stage
A data sampler including a first stage and a second stage. The first stage is configured to receive differential signals and provide a first edge rate in a first output signal and a second edge rate in a second output signal based on the differential signals. The se...
06/08/2010
7599316Bi-directional bridge circuit having high common mode rejection and high input sensitivity
A bidirectional communications interface is provided that connects a transmitter and a receiver, or a transceiver, to a transmission line. Under an embodiment, the bidirectional interface generates positive and negative polarity data signals using two separate diffe...
10/06/2009
7356046Method and apparatus for remotely monitoring and controlling devices
A system for remotely monitoring and controlling devices. A software-based protocol converter converts asynchronous serial control and data signals from a host application computer program to Internet Protocol (“IP”) packet-switched signals. The converted signal...
04/08/2008
7327802Method and apparatus for canceling the transmitted signal in a homodyne duplex transceiver
An apparatus comprises a transmitter, a receiver, an antenna and a signal cancellation circuit. The transmitter is configured to send a transmitter signal associated with a frequency. The receiver is associated with the frequency. The antenna is coupled to the trans...
02/05/2008
7277031100Base-FX serializer/deserializer using 10000Base-X serializer/deserializer
A physical layer device includes a deserializer that deserializes one of first and second data streams. The first data stream includes successive N-bit sequences having one of all ones and all zeros. A converter oversamples the first data stream, identifies edge tra...
10/02/2007
7243173Low protocol, high speed serial transfer for intra-board or inter-board data communication
A method and a circuit for converting parallel CPU information buses within circuit boards to serial data buses, while limiting overhead data to provide a low-level protocol and high rates of data transfer over distances up to forty inches. Larger scale parallel dat...
07/10/2007
7123660Method and system for deskewing parallel bus channels to increase data transfer rates
In one embodiment, a system for deskewing signals on parallel bus channels includes several parallel channels that carry several data input signals and a pair of complementary voltage and timing reference (VTR) signals. The system also includes several receivers, wi...
10/17/2006
7111181Apparatus for discovering a powerability condition of a computer network
The invention is directed to techniques for discovering a powerability condition of a computer network such as the existence of a remotely powerable device attached to a connecting medium of the computer network. Such detection can then control whether a remote powe...
09/19/2006
7103013Bidirectional bridge circuit having high common mode rejection and high input sensitivity
A bidirectional communications interface is provided that connects a transmitter and a receiver, or a transceiver, to a transmission line. Under an embodiment, the bidirectional interface generates positive and negative polarity data signals using two separate diffe...
09/05/2006
7095788Circuit for facilitating simultaneous multi-directional transmission of multiple signals between multiple circuits using a single transmission line
An encoding element (109, 111, 113) and a decoding arrangement (110, 112, 114) is included with each separate circuit (104, 105, 106) in a system (100) of circuits which must communicate digital signals with each other. The encoding devic...
08/22/2006
7088311Current generating circuit, semiconductor integrated circuit, electro-optical device, and electronic apparatus
The invention provides a current generating circuit with a single configuration, enhanced durability, and low power consumption. A circuit block C1 appropriately selects elemental currents i11 to i14 and i1F in accordance with data (bits)...
08/08/2006
7058131Signal transmission system with programmable voltage reference
A high speed signal transmission system employs differential receivers for receiving data signals transmitted over circuit transmission lines. One input each receiver is coupled to the output of a transmission line and to a termination network. The termination netwo...
06/06/2006
7030645Method for setting a termination voltage and an input circuit
Input circuit and method for setting a termination voltage. One embodiment provides a method for setting a termination voltage of an input circuit of an integrated circuit, the input circuit having an input terminal for receiving a signal, the termination voltage be...
04/18/2006
7031380Multi-client ADSL modem
A multi-client ADSL modem network (10) that can be configured for a home or office network when multiple ADSL client modems (18) are installed in different communication terminals (22). One ADSL modem (14) at a central office (12) ...
04/18/2006
7015838Programmable serializing data path
A programmable serial data path includes a programmable timing circuit and a parallel to serial module. The programmable timing circuit is operably coupled to generate a first plurality of timing signals when width of parallel input data is of a first multiple and t...
03/21/2006
6970516Programmable polarity for high speed differential interfaces
A system generally having a first circuit, a second circuit, and a pair of non-crossing conductive paths. The first circuit may be configured to convert between (i) a serial signal on a first differential interface and (ii) a parallel signal. The pair of non-crossin...
11/29/2005
6970435Data alignment compensator
An apparatus and method that correct skew associated with data receive from different transmission links. A known training pattern is sent through the transmission links. The training pattern is recovered and forwarded through delay registers/selecter logic to a mem...
11/29/2005
6959451Transmission communications management
An interactive transmission system having a data management module that identifies at least one transmission characteristic of at least one transmitter module. The transmitter module transmits data over a transport medium. The data management module modifies its beh...
10/25/2005
6944239CMOS receiver for simultaneous bi-directional links
Methods and apparatus are provided for implementing a receiver capable of receiving signals in simultaneous bi-directional current mode differential links. The receiver comprises a resistor-summing network and a differential amplifier. The resistor-summing network c...
09/13/2005
6934384Subscriber line interface circuitry
A subscriber line interface circuit apparatus includes a signal processor having sense inputs for sensed tip and ring signals of a subscriber loop. The signal processor generates linefeed driver control signals in response to the sensed signals. The signal processor...
08/23/2005
6911855Current-controlled CMOS circuit using higher voltage supply in low voltage CMOS process
Various circuit techniques for implementing ultra high speed circuits use current-controlled CMOS (C3MOS) logic fabricated in conventional CMOS process technology. An entire family of logic elements including inverter/buffers, level shifters, NAND, NOR, X...
06/28/2005
6728240Serial-link circuit including capacitive offset adjustment of a high-speed receiver
A serial link circuit includes a transmitter which multiplexes the circuit's input signals together and uses a single processing circuit to generate a multiplexed output to be transmitted. The multiplexing is done with a limited voltage swing prior to preamplificati...
04/27/2004
6704277Testing for digital signaling
In an electronic system having logic agents that communicate with each other through one or more signal lines, a method for testing high speed digital signaling on the signal lines is disclosed. The method involves sensing a first crosstalk signal induced...
03/09/2004
6639423Current mode driver with variable termination
A simultaneous bidirectional port circuit includes a current mode output driver for driving an output node and a current mode return driver for driving a differential receiver. Variable impedance termination devices are included to provide terminations fo...
10/28/2003
6631962System for ink short protection
A system for ink short protection for signaling to inkjet printheads includes a differential signaling driver having a first and a second terminal, a differential signaling receiver having a first and a second terminal, a first capacitor in series between...
10/14/2003
6584079Apparatus and method of implementing a home network by filtering ISDN-based signals within the customer premises
An arrangement for implementing a network in an ISDN-BASED customer premises having a 4-wire ISDN S0 bus. The ISDN-BASED customer premises includes a Network Termination Basic Access (NTBA) that interfaces between the residential customer premises and the...
06/24/2003
6578940System for ink short protection
A system for ink short protection for signaling to inkjet printheads includes a differential signaling driver having a first and a second terminal, a differential signaling receiver having a first and a second terminal, a first capacitor in series between...
06/17/2003
6507580Method of controlling a calling in distributed node exchange network, distributed node exchange and distributed node exchange network
The present invention provides a method of controlling a call between nodes in a distributed node exchange network having interconnections of plural exchanges, wherein a distributed node has a channel switch, a subscriber circuit, a trunk circuit accommod...
01/14/2003
6498511Receiver, hybrid circuit, driver circuit, and signal transmission system for bidirectional signal transmission for carrying out such signal transmission in both directions simultaneously
A receiver for bidirectional signal transmission, where signals are sent and received in both directions over a signal transmission line, has a signal line, a first hold capacitor, a signal line voltage buffer circuit, a hybrid circuit, and a decision cir...
12/24/2002
6463092System and method for sending and receiving data signals over a clock signal line
The system preferably includes a unique transmitter that sends both clock and data signals over the same transmission line. The receiver uses the same transmission line to send data signals back to the transmitter. The transmitter comprises a clock genera...
10/08/2002
6426970Bi-directional signal coupler method and apparatus
A bi-directional signal coupler is incorporated into a transmission/reception communication system and is used for the transmission and reception of signals over a single transmission medium. The bi-directional signal coupler includes a primary nulling de...
07/30/2002
6407684Method and device for estimating the frequency of a digital signal
A frequency estimator for estimating the frequency of a digital input signal (x(k)) includes a phase detection device (2) for determining the phase ($c;(k)) of the input signal (x(k)), a differentiator (3) for generating the phase difference ($c;
06/18/2002
6304106CMOS bi-directional current mode differential link with precompensation
A Complementary Metal Oxide Semiconductor (CMOS) current mode differential link with precompensation is provided. The Complementary Metal Oxide Semiconductor (CMOS) bi-directional current mode differential link with precompensation includes a CMOS driver ...
10/16/2001
6172992Measuring device for the interface of a transmission link with full-duplex transmission in two-wire common band operation
A measuring device for the interface of a transmission link with full-duplex transmission in two-wire common band operation includes a device for simulating the interface that allows the signal in the near-to-far direction on the transmission link to be s...
01/09/2001
6064657Method and system for transmitting data using a modem with a directional control mechanism
The present invention pertains to a system for transmitting data. The system comprises a network on which free topology transmission of data occurs. The system comprises a first node. The system comprises a second node. The system comprises a shared free ...
05/16/2000
6034995System for the transmission of data via a differential bus
The transmission of data via a differential bus by means of balanced signals is not only reliable, but also offers the advantage that in the event of various single faults, i.e. faults concerning only one of the two lines or faults where the two lines of ...
03/07/2000
5936946Measuring device for the interface of a transmission path with full-duplex transmission in the common carrier duplex process
A measuring device for the interface of a transmission path with full-duplex transmission in the common carrier duplex process. A highly integrated interface unit is connected to the interface via a hybrid set and a transmitter on one side. A line termina...
08/10/1999
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