1
Hatch Graham III, Daniel Seltz: Electronically programmable gate array having programmable interconnect lines. Zoran Corporation, Flehr Hohbach Test Albritton & Herbert, November 22, 1988: US04786904 (170 worldwide citation)

An electronically programmable gate array comprises a plurality of rows of logic cells with each cell having a plurality of inputs, at least one output, and a plurality of electronically programmable voltage levels for configuring the cell. A plurality of sets of interconnect lines are formed in the ...


2
Hatch Graham: Modulator having direct digital synthesis for broadband RF transmission. Stanford Telecommunications, Townsend and Townsend Khourie and Crew, May 2, 1995: US05412352 (134 worldwide citation)

A modulator for data transmitted in a reverse channel or upstream spectrum in a cable transmission system requires a single frequency translation from baseband to a selected RF channel, thus eliminating conventional intermediate frequency (IF) translation. The modulator requires fewer components tha ...


3
Thomas M Paff, Hatch Graham: High speed bidirectional digital cable transmission system. Stanford Telecommunications, Henry K Woodward, Townsend and Townsend and Crew, September 3, 1996: US05553064 (102 worldwide citation)

A high speed bidirectional cable transmission system for CATV and other television systems includes unidirectional transmission of video signals from a head end unit to a plurality of transceivers or subscribers connected to a transmission line. The head end unit encodes voice data using QPSK encodi ...


4
Hatch Graham, Christine Nguyen: Viterbi ACS unit with renormalization. Stanford Telecommunications, Townsend and Townsend Khourie and Crew, September 20, 1994: US05349608 (38 worldwide citation)

In a Viterbi decoder including an add-compare-select (ACS) processor, speed is enhanced without loss of performance by maintaining a dynamic cumulative metric range for computed state metrics. Current state metrics are added to new branch metrics to obtain two computed metrics, and the smaller of th ...


5
Hatch Graham, Charles Moses, Leonard Schuchman, Ronald Bruno: Portable cellular telephone using spread spectrum communication with mobile transceiver. Stanford Telecommunications, Townsend and Townsend Khourie and Crew, September 27, 1994: US05351270 (23 worldwide citation)

A portable cellular telephone system including a stationary transceiver for radio communication with a plurality of mobile transceivers within a geographic cell, a mobile transceiver within said geographic cell and having sufficient power to communicate with said stationary transceiver, and a portab ...


6
Hatch Graham III: Numerically controlled oscillator. August 25, 1992: US05142487 (6 worldwide citation)

A numerically controlled oscillator includes a phase accumulator which generates sequences of phase word phase signals. A demultiplexer 104 directs the odd and even numbered phase angle words of the sequence to identical but independent lookup tables to generate corresponding waveform signals. The w ...