WILLIAM JAMES DALLY
Pilots at Saddle Mtn Dr, Los Altos, CA
License number
California A2150989
Issued Date
Dec 2016
Expiration Date
Dec 2018
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
14345 Saddle Mountain Dr, Los Altos, CA 94022
Professional information
Configurable Delay Circuit
US Patent:
2014007, Mar 20, 2014
Filed:
Sep 14, 2012
Appl. No.:
13/619765
Inventors:
John W. POULTON - Chapel Hill NC, US
Robert Palmer - Chapel Hill NC, US
William James Dally - Los Altos Hills CA, US
Robert Palmer - Chapel Hill NC, US
William James Dally - Los Altos Hills CA, US
International Classification:
H03H 11/26
US Classification:
327278
Abstract:
One embodiment sets forth a technique for delaying signals by varying amounts. A configurable delay circuit includes fixed and tri-state inverters. Pullup and pulldown transistors within one or more tri-state inverters may be activated to reduce the delay introduced by fixed inverters. The pullup and pulldown transistors within one or more tri-state inverters may be separately activated to independently adjust the rising delay and the falling delay incurred by the input signal.
Data-Driven Charge-Pump Transmitter For Differential Signaling
US Patent:
2013019, Aug 1, 2013
Filed:
Jan 30, 2012
Appl. No.:
13/361843
Inventors:
John W. POULTON - Chapel Hill NC, US
William J. Dally - Los Altos Hills CA, US
William J. Dally - Los Altos Hills CA, US
Assignee:
NVIDIA Corporation - Santa Clara CA
International Classification:
G05F 3/02
US Classification:
327536
Abstract:
One embodiment of the present invention sets forth a mechanism for transmitting and receiving differential signals. A transmitter combines a direct current (DC) to DC converter including a capacitor with a 2:1 multiplexer to drive a pair of differential signaling lines. The transmitter drives a pair of voltages that are symmetric about the ground power supply level. Signaling currents are returned to the ground plane to minimize the generation of noise that is a source of crosstalk between different differential signaling pairs. Noise introduced through the power supply is correlated with the switching rate of the data and may be reduced using an equalizer circuit.
Single-Trigger Low-Energy Flip-Flop Circuit
US Patent:
2013021, Aug 22, 2013
Filed:
Mar 28, 2013
Appl. No.:
13/852987
Inventors:
NVIDIA Corporation - , US
William J. Dally - Los Altos Hills CA, US
William J. Dally - Los Altos Hills CA, US
Assignee:
NVIDIA Corporation - Santa Clara CA
International Classification:
H03K 3/286
US Classification:
327215
Abstract:
One embodiment of the present invention sets forth a technique for technique for capturing and storing a level of an input signal using a single-trigger low-energy flip-flop circuit that is fully-static and insensitive to fabrication process variations. The single-trigger low-energy flip-flop circuit presents only three transistor gate loads to the clock signal and none of the internal nodes toggle when the input signal remains constant. The output signal Q is set or reset at the rising clock edge using a single-trigger sub-circuit. A set or reset may be armed while the clock signal is low, and the set or reset is triggered at the rising edge of the clock.
Ground Referenced Single-Ended Signaling
US Patent:
8611437, Dec 17, 2013
Filed:
Jan 26, 2012
Appl. No.:
13/359433
Inventors:
John W. Poulton - Chapel Hill NC, US
William J. Dally - Los Altos Hills CA, US
William J. Dally - Los Altos Hills CA, US
Assignee:
NVIDIA Corporation - Santa Clara CA
International Classification:
H03K 17/16
US Classification:
375257, 375288, 375295, 375296, 375309, 375312
Abstract:
One embodiment of the present invention sets forth a mechanism for transmitting and receiving ground-referenced single-ended signals. A transmitter combines a direct current (DC) to DC converter including a flying capacitor with a 2:1 clocked multiplexer to drive a single-ended signaling line. The transmitter drives a pair of voltages that are symmetric about the ground power supply level. Signaling currents are returned to the ground plane to minimize the generation of noise that is a source of crosstalk between different signaling lines. Noise introduced through the power supply is correlated with the switching rate of the data and may be reduced using an equalizer circuit.
Ground Referenced Single-Ended Signaling
US Patent:
2014004, Feb 13, 2014
Filed:
Oct 16, 2013
Appl. No.:
14/055823
Inventors:
William J. Dally - Los Altos Hills CA, US
Assignee:
NVIDIA Corporation - Santa Clara CA
International Classification:
H03K 17/16, H04B 1/04
US Classification:
375229, 327379, 375297
Abstract:
One embodiment of the present invention sets forth a mechanism for transmitting and receiving ground-referenced single-ended signals. A transmitter combines a direct current (DC) to DC converter including a flying capacitor with a 2:1 clocked multiplexer to drive a single-ended signaling line. The transmitter drives a pair of voltages that are symmetric about the ground power supply level. Signaling currents are returned to the ground plane to minimize the generation of noise that is a source of crosstalk between different signaling lines. Noise introduced through the power supply is correlated with the switching rate of the data and may be reduced using an equalizer circuit.
Digital Transmitter
US Patent:
2013027, Oct 17, 2013
Filed:
Jun 10, 2013
Appl. No.:
13/914350
Inventors:
William J. Dally - Los Altos Hills CA, US
International Classification:
H04L 1/00
US Classification:
375232, 375257
Abstract:
An equalizer provided in a digital transmitter compensates for attenuation in a signal channel to a digital receiver. The equalizer generates signal levels as a logical function of bit history to emphasize transition signal levels relative to repeated signal levels. The preferred equalizer includes an FIR transition filter using a look-up table. Parallel circuits including FIR filters and digital-to-analog converters provide a high speed equalizer with lower speed circuitry. The equalizer is particularly suited to in-cabinet and local area network transmissions where feedback circuitry facilitates adaptive training of the equalizer.