Patents by Inventor David B. Scott

David B. Scott has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7091766
    Abstract: State retention registers for use in low-power standby modes of digital IC operation are provided, wherein: a differential circuit (M1?M3; M1?M4) is used to load the shadow latch from the normal functional latch; the signal (REST, RESTZ) used to restore data from the shadow latch to the normal functional latch is a “don't care” signal while the shadow latch is retaining the data during low-power standby mode; retained data from the shadow latch is restored to the normal functional latch via a transistor gate connected to a node (N10) of the shadow latch where the retained data is provided; a power supply (VDD) other than the shadow latch's power supply (VRETAIN) powers the data restore operation; and the normal functional latch is operable independently of the operational states of the high Vt transistors (M1, M2, M5 and M6; M3, M4, M5 and M6) used to implement the state retention functionality.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: August 15, 2006
    Assignee: Texas Instruments Incorporated
    Inventors: Uming Ko, David B. Scott, Sumanth Gururajarao, Hugh Mair
  • Patent number: 6989702
    Abstract: State retention registers for use in low-power standby modes of digital IC operation are provided, wherein: a differential circuit (M1–M3; M1–M4) is used to load the shadow latch from the normal functional latch; the signal (REST, RESTZ) used to restore data from the shadow latch to the normal functional latch is a “don't care” signal while the shadow latch is retaining the data during low-power standby mode; retained data from the shadow latch is restored to the normal functional latch via a transistor gate connected to anode (N10) of the shadow latch where the retained data is provided; a power supply (VDD) other than the shadow latch's power supply (VRETAIN) powers the data restore operation; and the normal functional latch is operable independently of the operational states of the high Vt transistors (M1, M2, M5 and M6; M3, M4, M5 and M6) used to implement the state retention functionality.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: January 24, 2006
    Assignee: Texas Instruments Incorporated
    Inventors: Uming Ko, David B. Scott, Sumanth Gururajarao, Hugh T. Mair, Peter H. Cumming, Franck Dahan
  • Patent number: 6956398
    Abstract: The method for powering down a circuit for a data retention mode includes: changing a supply voltage node from an active power voltage level to an inactive power level; coupling a source of a P channel device to the supply voltage node; providing a retaining power supply voltage level to a back gate of the P channel device; changing a drain voltage of the P channel device to a reference voltage level, wherein the reference voltage level is different from the retaining power supply voltage level; and changing a gate voltage of the P channel device to the reference voltage level.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: October 18, 2005
    Assignee: Texas Instruments Incorporated
    Inventors: Hugh Mair, Luan A. Dang, Xiaowei Deng, George B. Jamison, Tam M. Tran, Shyh-Horng Yang, David B. Scott
  • Patent number: 6831337
    Abstract: A method of forming a transistor (70) in a semiconductor active area (78). The method forms a gate structure (G2) in a fixed relationship to the semiconductor active area thereby defining a first source/drain region (R1) adjacent a first gate structure sidewall and a second source/drain region (R2) adjacent a second sidewall gate structure. The method also forms a lightly doped diffused region (801) formed in the first source/drain region and extending under the gate structure, wherein the lightly doped diffused region comprises a varying resistance in a direction parallel to the gate structure.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: December 14, 2004
    Assignee: Texas Instruments Incorporated
    Inventors: Zhiqiang Wu, David B. Scott
  • Patent number: 6773972
    Abstract: A method of forming a semiconductor circuit (20). The method forms a first transistor (NT1) using various steps, such as by forming a first source/drain region (361) as a first doped region in a fixed relationship to a semiconductor substrate (22) and forming a second source/drain region (362) as a second doped region in a fixed relationship to the semiconductor substrate. The second doped region and the first doped region are of a same conductivity type. Additionally, the first transistor is formed by forming a first gate (283) in a fixed relationship to the first source/drain region and the second drain region. The method also forms a second transistor (ST1) using various steps, such as by forming a third source/drain region (341) as a third doped region in a fixed relationship to the semiconductor substrate and forming a fourth source/drain region (342) as a fourth doped region in a fixed relationship to the semiconductor substrate.
    Type: Grant
    Filed: December 13, 2001
    Date of Patent: August 10, 2004
    Assignee: Texas Instruments Incorporated
    Inventors: Andrew Marshall, Youngmin Kim, David B Scott, Douglas E. Mercer
  • Patent number: 6730582
    Abstract: A method of forming a transistor (70) in a semiconductor active area (78). The method forms a gate structure (G2) in a fixed relationship to the semiconductor active area thereby defining a first source/drain region (R1) adjacent a first gate structure sidewall and a second source/drain region (R2) adjacent a second sidewall gate structure. The method also forms a lightly doped diffused region (801) formed in the first source/drain region and extending under the gate structure, wherein the lightly doped diffused region comprises a varying resistance in a direction parallel to the gate structure.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: May 4, 2004
    Assignee: Texas Instruments Incorporated
    Inventors: Zhiqiang Wu, David B. Scott
  • Patent number: 6727578
    Abstract: A semiconductor device (200) having a substrate routed power supply voltage is disclosed. The semiconductor device (200) includes a relatively highly doped substrate (302) and an epitaxial layer (304) formed over the substrate (302). In one embodiment (200), a surrounding conductive structure (202) is formed on the peripheral edges of the semiconductor device (200) die. The surrounding conductive structure (202) is coupled to the substrate (302). In another embodiment, the back side of the die (404) is coupled to the conductive portion (402) of an integrated circuit package. The conductive portion (402) is coupled to a power supply voltage. In another embodiment (700), the surrounding conductive structure (702) is coupled to a power supply voltage by one or more bond pads (710) formed on, or coupled to, the surrounding conductive structure (702).
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: April 27, 2004
    Assignee: Texas Instruments Incorporated
    Inventors: David B. Scott, Heng-Chih Lin
  • Publication number: 20040051574
    Abstract: State retention registers for use in low-power standby modes of digital IC operation are provided, wherein: a differential circuit (M1-M3; M1-M4) is used to load the shadow latch from the normal functional latch; the signal (REST, RESTZ) used to restore data from the shadow latch to the normal functional latch is a “don't care” signal while the shadow latch is retaining the data during low-power standby mode; retained data from the shadow latch is restored to the normal functional latch via a transistor gate connected to anode (N10) of the shadow latch where the retained data is provided; a power supply (VDD) other than the shadow latch's power supply (VRETAIN) powers the data restore operation; and the normal functional latch is operable independently of the operational states of the high Vt transistors (M1, M2, M5 and M6; M3, M4, M5 and M6) used to implement the state retention functionality.
    Type: Application
    Filed: July 3, 2003
    Publication date: March 18, 2004
    Inventors: Uming Ko, David B. Scott, Sumanth Gururajarao, Hugh T. Mair, Peter H. Cumming, Franck Dahan
  • Publication number: 20040014293
    Abstract: A method of forming a transistor (70) in a semiconductor active area (78). The method forms a gate structure (G2) in a fixed relationship to the semiconductor active area thereby defining a first source/drain region (R1) adjacent a first gate structure sidewall and a second source/drain region R2) adjacent a second sidewall gate structure. The method also forms a lightly doped diffused region (801) formed in the first source/drain region and extending under the gate structure, wherein the lightly doped diffused region comprises a varying resistance in a direction parallel to the gate structure.
    Type: Application
    Filed: July 17, 2003
    Publication date: January 22, 2004
    Inventors: Zhiqiang Wu, David B. Scott
  • Publication number: 20040008071
    Abstract: State retention registers for use in low-power standby modes of digital IC operation are provided, wherein: a differential circuit (M1−M3; M1−M4) is used to load the shadow latch from the normal functional latch; the signal (REST, RESTZ) used to restore data from the shadow latch to the normal functional latch is a “don't care” signal while the shadow latch is retaining the data during low-power standby mode; retained data from the shadow latch is restored to the normal functional latch via a transistor gate connected to a node (N10) of the shadow latch where the retained data is provided; a power supply (VDD) other than the shadow latch's power supply (VRETAIN) powers the data restore operation; and the normal functional latch is operable independently of the operational states of the high Vt transistors (M1, M2, M5 and M6; M3, M4, M5 and M6) used to implement the state retention functionality.
    Type: Application
    Filed: July 3, 2003
    Publication date: January 15, 2004
    Inventors: Uming Ko, David B. Scott, Sumanth Gururajarao, Hugh T Mair
  • Patent number: 6678202
    Abstract: A method is provided for reducing standby power in a memory array including a plurality of transistors. Each of the transistors includes a drain, a source and a gate. The method includes providing a memory array column (30) including a plurality of memory cells (10). Each memory cell (10) includes drive transistors (12). A current limiting transistor (34) is coupled to the drive transistors (12). A mode signal (38) is coupled to the current limiting transistor (34). The mode signal (38) is operable to deactivate the current limiting transistor (34). The current limiting transistor (34) is deactivated when the mode signal (38) indicates that the memory array column (30) is in a standby mode.
    Type: Grant
    Filed: November 25, 2001
    Date of Patent: January 13, 2004
    Assignee: Texas Instruments Incorporated
    Inventor: David B. Scott
  • Patent number: 6620692
    Abstract: A transistor (50) comprising a gate conductor (68) and a gate insulator (66) separating the gate conductor from a semiconductor material (64) having a first conductivity type. The transistor further comprises a drain region (782) having the first conductivity type. The transistor further comprises an angular implanted region (70) having a second conductivity type complementary of the first conductivity type and having an angular implanted region edge (70a) underlying the gate conductor, and the transistor includes a source region (781) formed at least in part within the angular implanted region. Finally, a transistor channel (74) is defined between an edge (71a) of the source region proximate the gate conductor and the angular implanted region edge (70a) underlying the gate conductor.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: September 16, 2003
    Assignee: Texas Instruments Incorporated
    Inventors: David B. Scott, Dan M. Mosher
  • Patent number: 6585328
    Abstract: A customized mattress evaluation system allows for uniquely designed mattresses based upon a particular customer's physical attributes. The system allows a retail mattress store to collect data from a sensor pad positioned on top of a support surface to generate a pressure profile for that person. The pressure profile and other information are used to generate specific mattress design parameters or co-efficients which are then utilized in designing a specific mattress uniquely customized for that person. Body type coefficients characteristic of an individual customer are correlated with coefficients developed for test persons for which various bedding products have been optimized. The optimization includes the rating of various bedding products for various body types by minimizing support pressures across the mattress and optimizing lumbar support for desired spinal curvature.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: July 1, 2003
    Assignee: L&P Property Management Company
    Inventors: Robert D. Oexman, David B. Scott
  • Publication number: 20030102492
    Abstract: A transistor (50) comprising a gate conductor (68) and a gate insulator (66) separating the gate conductor from a semiconductor material (64) having a first conductivity type. The transistor further comprises a drain region (722) having the first conductivity type. The transistor further comprises an angular implanted region (70) having a second conductivity type complementary of the first conductivity type and having an angular implanted region edge (70a) underlying the gate conductor, and the transistor includes a source region (721) formed at least in part within the angular implanted region. Finally, a transistor channel (74) is defined between an edge (72a1) of the source region proximate the gate conductor and the angular implanted region edge (70a) underlying the gate conductor.
    Type: Application
    Filed: April 26, 2002
    Publication date: June 5, 2003
    Inventors: David B. Scott, Dan M. Mosher
  • Patent number: 6426655
    Abstract: A circuit is designed with a decode circuit (313-315) having a first output terminal (319). The decode circuit is coupled to receive an address signal (81, 82, 85) having a first voltage range for producing a first output signal having one of a first and second logic levels. An output circuit (307, 309) is coupled to receive the first output signal and a power supply signal. The output circuit produces a second output signal having a second voltage range. A first latch transistor (301) is coupled to receive the second output signal. The first latch transistor is arranged to couple the first output terminal to a voltage terminal (209) in response to one of a first and second logic state of the second output signal. A second latch transistor (317) is coupled to receive the second output signal.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: July 30, 2002
    Assignee: Texas Instruments Incorporated
    Inventors: Stewart M. DeSoto, David B. Scott
  • Publication number: 20020084493
    Abstract: A method of forming a semiconductor circuit (20). The method forms a first transistor (NT1) using various steps, such as by forming a first source/drain region (361) as a first doped region in a fixed relationship to a semiconductor substrate (22) and forming a second source/drain region (362) as a second doped region in a fixed relationship to the semiconductor substrate. The second doped region and the first doped region are of a same conductivity type. Additionally, the first transistor is formed by forming a first gate (283) in a fixed relationship to the first source/drain region and the second drain region. The method also forms a second transistor (ST1) using various steps, such as by forming a third source/drain region (341) as a third doped region in a fixed relationship to the semiconductor substrate and forming a fourth source/drain region (342) as a fourth doped region in a fixed relationship to the semiconductor substrate.
    Type: Application
    Filed: December 13, 2001
    Publication date: July 4, 2002
    Inventors: Andrew Marshall, Youngmin Kim, David B. Scott, Douglas E. Mercer
  • Publication number: 20020079546
    Abstract: A method of forming a transistor (70) in a semiconductor active area (78). The method forms a gate structure (G2) in a fixed relationship to the semiconductor active area thereby defining a first source/drain region (R1) adjacent a first gate structure sidewall and a second source/drain region (R2) adjacent a second sidewall gate structure. The method also forms a lightly doped diffused region (801) formed in the first source/drain region and extending under the gate structure, wherein the lightly doped diffused region comprises a varying resistance in a direction parallel to the gate structure.
    Type: Application
    Filed: December 14, 2001
    Publication date: June 27, 2002
    Inventors: Zhiqiang Wu, David B. Scott
  • Publication number: 20020080676
    Abstract: A method is provided for reducing standby power in a memory array including a plurality of transistors. Each of the transistors includes a drain, a source and a gate. The method includes providing a memory array column (30) including a plurality of memory cells (10). Each memory cell (10) includes drive transistors (12). A current limiting transistor (34) is coupled to the drive transistors (12). A mode signal (38) is coupled to the current limiting transistor (34). The mode signal (38) is operable to deactivate the current limiting transistor (34). The current limiting transistor (34) is deactivated when the mode signal (38) indicates that the memory array column (30) is in a standby mode.
    Type: Application
    Filed: November 25, 2001
    Publication date: June 27, 2002
    Inventor: David B. Scott
  • Publication number: 20020063263
    Abstract: A transistor (50) comprising a gate conductor (68) and a gate insulator (66) separating the gate conductor from a semiconductor material (64) having a first conductivity type. The transistor further comprises a drain region (722) having the first conductivity type. The transistor further comprises an angular implanted region (70) having a second conductivity type complementary of the first conductivity type and having an angular implanted region edge (70a) underlying the gate conductor, and the transistor includes a source region (721) formed at least in part within the angular implanted region. Finally, a transistor channel (74) is defined between an edge (72a1) of the source region proximate the gate conductor and the angular implanted region edge (70a) underlying the gate conductor.
    Type: Application
    Filed: November 30, 2001
    Publication date: May 30, 2002
    Inventors: David B. Scott, Dan M. Mosher
  • Patent number: 6278297
    Abstract: A circuit is designed with a decode circuit (313-315) having a first output terminal (319). The decode circuit is coupled to receive an address signal (81, 82, 85) having a first voltage range for producing a first output signal having one of a first and second logic levels. An output circuit (307, 309) is coupled to receive the first output signal and a power supply signal. The output circuit produces a second output signal having a second voltage range. A first latch transistor (301) is coupled to receive the second output signal. The first latch transistor is arranged to couple the first output terminal to a voltage terminal (209) in response to one of a first and second logic state of the second output signal. A second latch transistor (317) is coupled to receive the second output signal. The second latch transistor is arranged to couple the first output terminal to a reference terminal (318) in response to another of the first and second logic state of the second output signal.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: August 21, 2001
    Assignee: Texas Instruments Incorporated
    Inventors: Stewart M. DeSoto, David B. Scott