David Joseph Ray

US Patent:

40817440, Mar 28, 1978

Filed:

Nov 10, 1976

Appl. No.:

5/740516

Inventors:

David J. Ray - Albuquerque NM

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

G01R 2702

US Classification:

324 63

Abstract:

A conditioning circuit for a resistance bridge transducer that includes output signal amplification, a voltage regulated DC power source for transducer excitation and a calibration select circuit for selectively inserting a shunt calibration resistor into parallel with one bridge arm. The calibration select circuit comprises a field effect transistor switch that is connected in series with the calibration resistor between two adjacent transducer terminals. The field effect transistor switch is operated by the output of an operational amplifier in response to positive and negative DC control signals. The conditioning circuit is adaptable to miniaturization through the use of integrated and hybrid circuits.

US Patent:

39861279, Oct 12, 1976

Filed:

May 27, 1975

Appl. No.:

5/581176

Inventors:

David J. Ray - Albuquerque NM

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

G06G 718
G06G 712

US Classification:

328128

Abstract:

An integrated feedback active filter/integrator processes electrical signals and performs bandpass and lowpass filtering or integration and double integration. The integrating and double integrating features are obtained by setting the quality factor of the bandpass filter to one half. This provides accurate integration for all frequencies greater than about ten times the center frequency of the filter. The circuit integrates the output and returns (feeds back) this value in the negative sense to the circuit input.

Address:

1891 E 43 Ave, Denver, CO 80249

Phone:

7204485363

VIN:

5FNYF4H78CB010758

Make:

HONDA

Model:

PILOT

Year:

2012

Address:

208 Aliso Dr SE, Albuquerque, NM 87108

VIN:

3TMLU4EN6AM045617

Make:

TOYOTA

Model:

TACOMA

Year:

2010