ROY A VARGAS
Electrician at Fm 973, Austin, TX
License number
Texas 356271
Expiration Date
Jan 15, 2017
Category
Apprentice Electrician
Address
Address
8421 S Fm 973 S FM 973, Austin, TX 78719
Phone
(512) 289-3686
Professional information
Principal Staff Engineer At Integrated Device Technology, Inc.
Location:
Austin, Texas Area
Industry:
Semiconductors
Programmable Analog Input/Output Integrated Circuit System
US Patent:
7366577, Apr 29, 2008
Filed:
Jan 27, 2003
Appl. No.:
10/351797
Inventors:
Leonard J DiSanza - Austin TX, US
David T. Roach - Austin TX, US
Roy L. Vargas - Austin TX, US
Daniel T Bogard - Austin TX, US
David T. Roach - Austin TX, US
Roy L. Vargas - Austin TX, US
Daniel T Bogard - Austin TX, US
Assignee:
Sigmatel, Inc. - Austin TX
International Classification:
G06F 17/00
US Classification:
700 94, 381 58, 381 59, 381123
Abstract:
The programmable analog input/output integrated circuit system includes a plurality of integrated circuit pins, an analog input/output circuit, a control module, and a switching module. The analog input/output circuit is coupled to the plurality of pins and determines the input/output status of each of the pins. The control module generates an I/O control signal and a switching control signal based on the input/output status of the integrated circuit pins. The I/O control signal is provided to the analog I/O circuit, which configures itself as an input or output based on the I/O control signal. The control module provides the switching control signal to the switching module, which configures itself to couple the analog input and/or analog output to corresponding functional circuitry of the corresponding integrated circuit.
System And Method To Establish An Adjustable On-Chip Impedance
US Patent:
2004010, Jun 3, 2004
Filed:
Nov 25, 2003
Appl. No.:
10/721203
Inventors:
Roy Vargas - Austin TX, US
International Classification:
G06F001/00
US Classification:
327/334000
Abstract:
A method to establish an adjustable on-chip impedance within a predetermined range that involves establishing a reference current for the adjustable on-chip impedance and applying this reference current to the adjustable on-chip impedance. A voltage produced by applying the reference current to the adjustable on-chip impedance is sensed and compared with the comparator or other similar processor to a reference voltage. This comparison allows the adjustable on-chip impedance to be tuned when the comparison of the sense voltage and the reference voltage is unfavorable. Tuning the impedance results in an impedance value within a predetermined range that accounts for variances of both the reference current and reference voltage.