Patents by Inventor Santiago L. Bortman

Santiago L. Bortman 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 signal detector and full wave rectifier circuit thereof with common mode signal rejection
    Patent number: 9450511
    Abstract: A full wave rectifier (270) for use as part a differential signal detector (400) detects both high and low envelopes of differential signals (RXa, RXb) at a pair of differential inputs (202, 204) and provides a sense signal (VSENSE) at an output (220) thereof. The differential signal detector (400) includes both the full wave rectifier (270) and a voltage reference source (260) having a circuit architecture in common, and a comparator for comparing the sense signal (VSENSE) with a reference voltage (VREF). The circuit configuration of both the full wave rectifier (270) and the voltage reference source (260) include first and second differential input circuits (271 and 273, 261 and 263) each including a pair of field effect transistors (2722, 2742 and 2762, 2782; 2622, 2642 and 2662, 2682) of different conductivity type having respective source terminals (2728, 2748; 2768, 2788; 2628, 2648; 2668, 2688) coupled together.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: September 20, 2016
    Assignee: Cadence Design Systems, Inc.
    Inventors: Santiago L. Bortman, Eric H. Naviasky