Richard Henry Wyles

US Patent:

6587001, Jul 1, 2003

Filed:

Sep 25, 2002

Appl. No.:

10/255415

Inventors:

Richard H. Wyles - Carpinteria CA
John L. Vampola - Santa Barbara CA

Assignee:

Raytheon Company - Lexington MA

International Classification:

H03F 304

US Classification:

330296, 330277, 330288

Abstract:

An electronic circuit device for driving a load comprises a load terminal, a control terminal and a power terminal for connection to a source of electric power. The load terminal may be in an emitter or a source circuit of the circuit device, and connects to a power supply return terminal by means of three electric elements connected in parallel, namely, the capacitance of a load, a bias current supply, and a current bypass. A voltage sensor is connected between the control terminal and the load terminal for sensing a voltage drop developed between the control terminal and the load terminal. The voltage sensor it is operative to activate the bypass to conduct current in parallel with current flow of the current source in the situation wherein the voltage drop exceeds a threshold. Thereby, the circuit device drives the load in one direction, and the current source and the bypass drive the load in the opposite correction.

US Patent:

6649913, Nov 18, 2003

Filed:

Feb 26, 2002

Appl. No.:

10/084687

Inventors:

Adam M. Kennedy - Santa Barbara CA
Michael Ray - Goleta CA
Richard H. Wyles - Santa Barbara CA
Jessica K. Wyles - Santa Barbara CA
William A. Radford - Santa Barbara CA

Assignee:

Raytheon Company - Lexington MA

International Classification:

G01J 500

US Classification:

250352, 250353

Abstract:

A focal plane array (FPA) of infrared (IR) radiation detectors ( ), such as an array of microbolometers, includes an active area ( A) containing a plurality of IR radiation detectors, a readout integrated circuit (ROIC) ( ) that is mechanically and electrically coupled to the active area and, disposed on the ROIC, a plurality of heater elements ( A) that are located and operated so as to provide a substantially uniform thermal distribution across at least the active area. The FPA further includes a plurality of temperature sensors ( B), individual ones of which are spatially associated with one of the heater elements for sensing the temperature in the vicinity of the associated heater element for providing closed loop operation of the associated heater element. In one embodiment pairs of the heater elements and associated temperature sensors are distributed in a substantially uniform manner across at least a top or a bottom surface of the ROIC, while in another embodiment pairs of the heater elements and associated temperature sensors, or only the heater elements, are distributed in accordance with a predetermined thermal profile of the FPA. The plurality of heater elements may each be composed of a silicon resistance, and the plurality of temperature sensors may each be each composed of a silicon temperature sensor.

US Patent:

6885002, Apr 26, 2005

Filed:

Aug 31, 2001

Appl. No.:

09/945518

Inventors:

James A. Finch - Santa Barbara CA, US
Roger W. Graham - Santa Barbara CA, US
Stephen H. Black - Buellton CA, US
Jerry A. Wilson - Goleta CA, US
Richard H. Wyles - Carpinteria CA, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01L025/00

US Classification:

250332, 250330

Abstract:

A unit cell () of a readout integrated circuit is constructed and operated so as to temporally align an image obtained in a first spectral band with a an image obtained in a second spectral band. A method operates, during a frame period, to sub-frame average a first signal detected in the first spectral band by a multi-spectral detector (), to sub-frame average a first signal detected in the second spectral band by the multi-spectral detector, and to sub-frame average a second signal detected in the first spectral band by the multi-spectral detector. The method then reads out the sub-frame averaged signals for each spectral band. The sub-frame averaged may be read out simultaneously from the unit cell. When sub-frame averaging the first and second signals in the first spectral band the method performs a plurality of consecutive sub-integrations and stores the result of each sub-integration on a first sub-frame averaging capacitance, and when sub-frame averaging the first signal of the second spectral band the method performs a single integration of the second signal, and stores the result of the integration on a second sub-frame averaging capacitance. The first spectral band may correspond to long wavelength infrared radiation (LWIR), and the second spectral band may correspond to medium wavelength infrared radiation (MWIR).

US Patent:

20130088594, Apr 11, 2013

Filed:

Oct 11, 2011

Appl. No.:

13/270557

Inventors:

Richard H. Wyles - Santa Barbara CA, US
James F. Asbrock - Oceanside CA, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H04N 7/18
H04N 5/335

US Classification:

348144, 348294, 348148, 348E07085, 348E05091

Abstract:

Methods and apparatus to provide, from data from a single sensor, high-resolution imagery at a first frame rate, such as typical video frame rate, and lower-resolution imagery at a second frame rate, which is higher than the first rate. In one embodiment, the first frame rate data can be viewed by a user and the second frame rate data can be processed to identify an event of interest, such as pulsed light.

US Patent:

50438204, Aug 27, 1991

Filed:

Mar 27, 1989

Appl. No.:

7/329229

Inventors:

Richard H. Wyles - Cardiff CA
James L. Gates - Vista CA
Steven D. Gaalema - Encinitas CA

Assignee:

Hughes Aircraft Company - Los Angeles CA

International Classification:

H04N 530

US Classification:

35821328

Abstract:

A readout circuit for use with a focal plane array that employs a single transistor in each unit cell and a single capacitive feedback transimpedance amplifier to process the outputs of each column of detector elements of the array. The capacitive feedback transimpedance amplifiers extract the signals associated with the pixels along a particular row of the array. The present invention permits high performance readouts to be constructed with very little circuitry in the unit cells. Only a single minimum sized transistor switch is required in each unit cell to perform readout and reset functions for the array. In the disclosed embodiment, the readout circuit comprises an array of unit cells, each cell comprising a detector input circuit, a single transistor and a single charge storage capacitor. Row address circuits are coupled to the cells in each row of the array. A plurality of capacitive feedback transimpedance amplifiers are coupled to the cells in each column of the array.

US Patent:

51285347, Jul 7, 1992

Filed:

Jul 17, 1990

Appl. No.:

7/554238

Inventors:

Richard H. Wyles - Cardiff CA
Albert E. Cosand - Agoura CA

Assignee:

Hughes Aircraft Company - Los Angeles CA

International Classification:

H01J 4014

US Classification:

2502081

Abstract:

A high charge capacity readout cell in a hybrid focal plane detector array on a complementary metal oxide semiconductor integrated circuit chip. An input transistor that provides a buffer for the detectors of the array, couples to a source of bias voltage, which controls the operation of the transistor. An integrating capacitor uses a variable source of terminating voltage to increase the amount of charge it integrates. A read signal causes an output transistor to read the charge from the capacitor to a readout line and to initialize the capacitor. The termination voltage of the integrating capacitor is changed during the time that the detector current is integrated, thus increasing the change in total voltage across the capacitor. This allows a greater amount of charge to be integrated with the capacitor which improves the signal-to-noise ratio of the focal plane array.

US Patent:

60405686, Mar 21, 2000

Filed:

May 6, 1998

Appl. No.:

9/073408

Inventors:

John T. Caulfield - Santa Barbara CA
Richard H. Wyles - Carpinteria CA
John D. Schlesselmann - Goleta CA
Kevin L. Pettijohn - Goleta CA

Assignee:

Raytheon Company - Lexington MA

International Classification:

H01L 2500

US Classification:

2502081

Abstract:

An IR-FPA (10) having a plurality of radiation detectors (2a) and a multipurpose ROIC (2) is disclosed. The radiation detectors (2a) are organized as a two dimensional array. The multipurpose ROIC (2) includes a plurality of readout circuit unit cells, individual ones of which are coupled to individual radiation detectors (2a) for receiving electrical signals therefrom. Each of the readout circuit unit cells operates in one of a first mode to provide a corrected m frame averaged output signal (Vout. sub. THPF) or, a second mode to provide a subframed averaged output signal (Vout. sub. 2). In the first operating mode, a high pass filtering circuit subtracts a low frequency charge pedestal from the electrical signal to form the corrected m frame averaged output (Vout. sub. THPF). Also disclosed is a method for operating an array of radiation detectors (2a) which includes the steps of: within a sampling period that defines a frame comprised of subframe periods, generating an electrical signal in individual ones of the radiation detectors, the electrical signals being generated in response to incident radiation; in a first operating mode, forming a high pass filtered output signal (Vout. sub. THPF) from electrical signals generated during at least one frame period; in a second operating mode, forming a subframe averaged output signal (Vout. sub.

US Patent:

RE349089, Apr 18, 1995

Filed:

Jan 24, 1994

Appl. No.:

8/185615

Inventors:

Richard H. Wyles - Carlsbad CA
David Madajian - Oakland CA

Assignee:

Hughes Aircraft Company - Los Angeles CA

International Classification:

H01J 4014

US Classification:

2502081

Abstract:

A Source-Follower-per-Detector (SFC) unit cell [12], a two dimensional array [30] of same and a method of operating the two dimensional array. Each unit cell is constructed with but three transistors [14, 16, 22] and is coupled to an associated radiation detector [10] for receiving an output signal therefrom. A method includes a first step of (a) reading out a first row (N) of unit cells by asserting a first row enable signal for causing each of the unit cells of the row (N) to impress an electrical signal onto an associated output signal line. The electrical signal has a magnitude that is a function of the associated detector output signal. The method includes an additional step of (b) simultaneously resetting another row of unit cells each of which has a reset input coupled to and responsive to the assertion of the first row enable signal line.