Patents by Inventor Dan C. Hu

Dan C. Hu 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).

  • Differential input buffer using local reference voltage and method of construction
    Patent number: 5990708
    Abstract: A differential input buffer (14) and method of construction are provided. The differential input buffer (14) includes a differential amplifier (54, 56, 50, 52, 62, 64) connected to receive an input signal (IN). A local reference voltage generator (68, 70, 72) is connected to the differential amplifier (54, 56, 50, 52, 62, 64) and is connected to receive an external voltage reference (BLR) and to provide a local reference voltage (VREF) to the differential amplifier (54, 56, 50, 52, 62, 64). The local reference generator (68, 70, 72) is adjustable during construction to produce a desired level for the local reference voltage (VREF). The differential input buffer (14) also includes a hysteresis element (66, 74) that is connected to provide feedback to the differential amplifier (54, 56, 50, 52, 62, 64) and includes a buffer stage (76, 78, 80, 82, 84, 86) that is connected to receive an output of the differential amplifier (54, 56, 50, 52, 62, 64) and to drive an output signal (OUT).
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: November 23, 1999
    Assignee: Texas Instruments Incorporated
    Inventor: Dan C. Hu