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Patent # Description
US-6,222,891 Timing recovery using the pilot signal in high definition TV
Improved carrier recovery and symbol timing systems and methods suitable for use in connection with a dual-mode QAM/VSB receiver system is disclosed. Carrier and...
US-6,219,088 NTSC interference rejection filter
An electronic, programmable filter is disclosed which selectively removes interference, noise or distortion components from a frequency band without perturbing...
US-6,212,119 Dynamic register with low clock rate testing capability
A method for refreshing data in a circuit element included in a dynamic register. A static loop is coupled to the circuit element as a feedback path from the...
US-6,211,742 Lock detector for phase locked loops
A detector circuit for determining whether synchronization lock has been optimally achieved in feedback-type control systems. The detector circuit evaluates an...
US-6,204,794 Analog to digital converter
An analog-to-digital converter (ADC) formed on an integrated circuit chip from a plurality of cells includes a differential amplifier having first and second...
US-6,201,831 Demodulator for a multi-pair gigabit transceiver
A feedforward equalizer for equalizing a sequence of signal samples received by a receiver from a remote transmitter. The feedforward equalizer has a gain and is...
US-6,201,796 Startup protocol for high throughput communications systems
A startup protocol is provided for use in a communications system having a plurality of transceivers, one transceiver acting as a master and another transceiver...
US-6,191,719 Digital to analog converter with reduced ringing
Binary indications are converted to an analog representation with significant reduction in ringing at the transitions between successive binary indications and...
US-6,189,064 Graphics display system with unified memory architecture
A graphics display system integrated circuit is used in a set-top box for controlling a television display. The graphics display system processes analog video...
US-6,185,263 Adaptively configurable class-A/class-B transmit DAC for transceiver emission and power consumption control
A power efficient and reduced electromagentic interference (EMI) emissions transmitter for unshielded twisted pair (UTP) data communication applications. Digital...
US-6,185,261 Determination of transmitter distortion
The present invention provides a method for determining nonlinear distortion of a transmitter. A test symbol sequence is transmitted from the transmitter under...
US-6,181,210 Low offset and low glitch energy charge pump for PLL-based timing recovery systems
A high precision charge pump used in a phase-lock-loop incorporating a phase/frequency detector is designed and constructed to substantially eliminate the...
US-6,178,198 Apparatus for, and method of, processing signals transmitted over a local area network
Digital signals provided by a repeater connected to a plurality of clients by unshielded twisted wire pairs, are converted to analog signals which become...
US-6,169,510 Analog to digital converter
The output of each cell in an A-D converter on an IC chip is dependent upon the relative values of an input voltage and an individual one of progressive...
US-6,154,446 Network switching architecture utilizing cell based and packet based per class-of-service head-of-line blocking...
A network switch for network communications includes a first data port interface which supports a plurality of data ports which transmit and receive data at a...
US-6,144,712 Variable rate modulator
Digital data signals at a variable input frequency are converted by a numerically controlled oscillator and an interpolator to a signal at a fixed output...
US-6,130,894 Off-line broadband network interface
A network interface is presented that receives packet data from a shared medium and accomplishes the signal processing required to convert the data packet to...
US-6,127,903 Filter with manually operable signal carrier guides
A filter apparatus includes a housing having a first body portion and a second body portion which mate together to enclose an accessible inner portion of the...
US-6,104,696 Method for sending packets between trunk ports of network switches
The present invention is directed to a system and method of sending packets between ports on trunked network switches. The method includes providing a first...
US-6,100,836 Analog to digital converter
An analog-to-digital converter (ADC) formed on an integrated circuit chip from a plurality of cells includes a differential amplifier having first and second...
US-6,088,354 System for, and method of, providing a header and a trailer in data packets
Each packet normally consists of a preamble, start-of-frame delimiter and data. The preamble has nibbles each having a particular format. A header substituted...
US-6,075,814 Method and apparatus for reducing signal processing requirements for transmitting packet-based data with a modem
A modem and method for operating same. A receiver circuit of the modem is coupled to receive a continuous analog signal from a communication channel. This analog...
US-6,014,098 Analog to digital converter
The output of each cell in an A-D converter on an IC chip is dependent upon the relative values of an input voltage and an individual one of progressive...
US-5,835,048 Analog-to-digital converter with improved cell mismatch compensation
An analog-to-digital converter (ADC) formed on an integrated circuit chip from a plurality of cells includes a differential amplifier having first and second...
US-5,754,591 System for, and method of, processing quadrature amplitude modulated signals
Analog signals encoded with quadrature amplitude modulation (QAM) pass through a coaxial cable at a particular baud rate. These signals have a carrier frequency...
US-5,640,670 Narrow-band quadrature demodulator for recovering analog video and digital audio in a direct broadcast system
A direct broadcast satellite sends subscribers signals received from an earth-station transmitter and typically having a 10 MHz bandwidth, 6 MHz for an analog...
US-5,604,741 Ethernet system
Four (4) unshielded twisted pairs of wires connect a hub and a computer in an Ethernet system: one (1) pair for transmission only, another for reception only and...
US-4,985,707 Retrodirective adaptive loop for meteor communications
Communications link using the ionized trail of a meteor entering the atmosphere at an altitude of approximately 100 kilometers as reflectors to relay radio...
US-4,477,900 Successive frame digital multiplexer with increased channel capacity
A digital multiplexer accommodates a large number of information signal channels per digital transmission channel through use of an improved statistical coding...
US-4,451,699 Communications system and network
A communications system and network wherein communications links between subscribers are established by retrodirective oscillating loops between each subscriber...
US-4,339,818 Digital multiplexer with increased channel capacity
A digital multiplexer accommodates a large number of voice channels per digital channel through use of an improved statistical coding technique. Analog...
US-4,337,376 Communications system and network
A communications system and network wherein communications links between subscribers are established by retrodirective oscillating loops between each subscriber...
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