John M Corcoran

US Patent:

6586283, Jul 1, 2003

Filed:

Mar 30, 2000

Appl. No.:

09/539490

Inventors:

John J. Corcoran - Portola Valley CA
Travis N. Blalock - Charlottesville VA
Paul J. Vande Voorde - San Mateo CA
Thomas A. Knotts - Palo Alto CA
Neela B. Gaddis - Saratoga CA

Assignee:

Agilent Technologies, Inc. - Palo Alto CA

International Classification:

H01L 31332

US Classification:

438140, 438 48, 438570, 438454

Abstract:

An apparatus and a method for protecting charge storage elements from photo-induced currents in silicon integrated circuits are provided. In order to protect against photo-induced currents that are generated outside the storage node circuits themselves, an n-well guard ring is placed as closely as possible to the transistors and other elements in the storage node circuits. As a result there is a minimum of exposed silicon area in which light can produce current in areas next to the storage node circuits, and the n-well guard ring captures photo-induced currents that are generated outside the storage node circuits. In order to protect against the photo-induced currents that are generated inside the storage node circuits, an aluminum interconnect layer is placed on top of the storage node circuit, separated by an insulating layer of silicon dioxide. This creates a shield against the light and protects the storage node circuit by reflecting light away.

US Patent:

50319922, Jul 16, 1991

Filed:

Mar 19, 1990

Appl. No.:

7/495508

Inventors:

John W. Corcoran - Los Altos CA

Assignee:

Ampex Corporation - Redwood City CA

International Classification:

G02B 632

US Classification:

350 9618

Abstract:

A multi-channel rotary optical coupler incorporates a multi-element lens assembly formed of a coplanar plurality of annular convex lens elements, with each lens element of the assembly having a substantially constant annular width and a discrete optical axis, with each optical axis of each lens element radially displaced about a central rotational axis of the coupler. Each lens element receives an output from a respective data modulated light source and provides discrete data channels for the continuous transmission of discrete data signals through the lens elements to respective similarly radially displaced optical detectors of a detector array.

US Patent:

42801966, Jul 21, 1981

Filed:

Nov 14, 1979

Appl. No.:

6/094007

Inventors:

Thomas Hornak - Portola Valley CA
John J. Corcoran - Portola Valley CA
Samuel H. Maslak - Palo Alto CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

G11C 2702
G11C 1928

US Classification:

365 45

Abstract:

A system is provided in which an analog storage device stores, delays, and/or changes the time scale of an input analog waveform. The system provides an output which is corrected for the gain and offset of the analog storage device by exercising the system using known analog inputs and combining the output so obtained with the uncorrected output of the input analog waveform. In a preferred embodiment, the output is also corrected for non-linear and dispersive distortion of the storage device by exercising the system using an input analog signal derived from the earlier output of the system (corrected for gain and offset) and suitably combining the new output so generated with the earlier output.

US Patent:

52949265, Mar 15, 1994

Filed:

Oct 9, 1992

Appl. No.:

7/960478

Inventors:

John J. Corcoran - Portola Valley CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

H03M 110

US Classification:

341120

Abstract:

Methods for calibrating a plurality of N time-interleaved analog-to-digital converters (ADCs) for any integer N. gtoreq. 2 by detecting and/or correcting timing and amplitude errors therein, where each of the ADCs, numbered j=1, 2,. . . , N has an identical clock frequency f. sub. c and period T. sub. c =(f. sub. c). sup. -1. Ideally, the N ADCs are clocked uniformly in time so that two consecutively clocked ADCs number j1 and j1+1 have effective sampling times that differ by time intervals of uniform length. DELTA. t=T. sub. c /N. Ideally, the N ADCs also have identical gains from their analog input signals to their digital output signals. In a calibration procedure, all ADCs receive a common analog input signal S. sub. in (t)=Asin[2. pi. (1+s)f. sub. c t], where s is a non-zero fractional number satisfying -0.

US Patent:

51553880, Oct 13, 1992

Filed:

Dec 20, 1990

Appl. No.:

7/632275

Inventors:

John J. Corcoran - Portola Valley CA
Kenneth D. Poulton - Palo Alto CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

H03K 1923
H03K 522
H03K 1920

US Classification:

307464

Abstract:

Apparatus for introduction of a controllable time delay in the transition of a logic device output signal from a first logical level to a second logical level, in response to change of an input signal, or the difference of two input signals from a third logical level to a fourth logical level, delivered to the logic device. In a first embodiment, a limiting amplifier receives an input signal S. sub. in and a threshold signal V. sub. T at its two terminals and forms an amplified difference output signal S. sub. out. A selected voltage level signal V. sub. L and S. sub. out are received at a signum function module and the output signal sgn(S. sub. out -V. sub. L) is formed and issued. The signum output signal is multiplied by a controllable real number m and is added to V. sub. L to form the threshold signal V. sub. T.

US Patent:

61762326, Jan 23, 2001

Filed:

Sep 17, 1999

Appl. No.:

9/398850

Inventors:

John Corcoran - Saratoga CA

International Classification:

A47J 3600

US Classification:

126 25R

Abstract:

A heat control device, for use with a barbecue having a hood top and a cooking base, wherein the hood top is hingeably attached to the cooking base, comprising a main body and a clamping assembly. The main body has a hood hollow for supporting the hood top and a rim hollow for engaging the cooking base and sliding longitudinally therealong. Heat flow from the barbecue is adjusted by adjusting an angle between the hood top and cooking base, and then positioning the main body upon the cooking base in a position where it will maintain said angle. The clamping assembly is then used to fix the position of the main body on the cooking base rim.