Patents by Inventor Scott Warren Cameron

Scott Warren Cameron 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).

  • Input stage with reduced transient time for use in multiplexing transducers that require a switched DC bias
    Patent number: 6172548
    Abstract: The present application discloses an innovative improved circuit, in which the long transient at write-to-read transitions is avoided by using a shorting switch to short the inputs of the first amplifier stage together when the read amplifier is activated. This speeds up write-to-read transition. Moreover, since read mode can now be entered more quickly after a power-down condition, this circuit also permits the use of other power-saving tricks to idle the read amplifier momentarily.
    Type: Grant
    Filed: December 30, 1994
    Date of Patent: January 9, 2001
    Assignee: STMicroelectronics, Inc.
    Inventors: Scott Warren Cameron, Axel Alegre de La Soujeole
  • Differential amplifier with proxy load for control of output common mode range
    Patent number: 5770968
    Abstract: An innovative differential amplifier circuit, which can control the midpoint potential of a load which does not itself have any midpoint connection. This is achieved by using a proxy load element in parallel with the primary load. The proxy load is of much higher impedance value than the primary load, and does have a center tap. The potential of the center tap of the mirrored load is used for a feedback connection to a control loop which regulates the output to both the primary load and the proxy load.
    Type: Grant
    Filed: December 30, 1994
    Date of Patent: June 23, 1998
    Assignee: SGS-Thomson Microelectronics, Inc.
    Inventor: Scott Warren Cameron
  • Symmetrical resistive transducer biasing circuit and method
    Patent number: 5701213
    Abstract: An innovative disk drive system which provides a regulated bias current to a magnetoresistive read head, and controls the voltage of the magnetoresistive read head terminals so that the CENTER of the resistor is at ground. This halves the peak magnitude of the head-to-disk voltage.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: December 23, 1997
    Assignee: SGS-Thomson Microelectronics, Inc.
    Inventors: Scott Warren Cameron, Axel Alegre de La Soujeole
  • Differential high speed inductive driver with a bidirectional current limiting output stage
    Patent number: 5696460
    Abstract: An innovative circuit for driving the write head. All of the driving transistors are NPN, and are prevented from saturation. This is achieved by shifting and scaling down the differential drive applied to the pull-up transistors, to drive the pull-down transistors with levels such that the pull-down transistors cannot reach saturation. This provides a very simple circuit in which all four of the drive transistors are NPN, and all are kept out of saturation. Moreover, the peak write current applied to the head is precisely limited.
    Type: Grant
    Filed: August 12, 1996
    Date of Patent: December 9, 1997
    Assignee: SGS-Thomson Microelectronics, Inc.
    Inventor: Scott Warren Cameron