David Timothy Magee

US Patent:

20210096442, Apr 1, 2021

Filed:

Sep 27, 2019

Appl. No.:

16/586644

Inventors:

- Dallas TX, US
Nirmal C. Warke - Saratoga CA, US
David P. Magee - Allen TX, US
Rahmi Hezar - Allen TX, US
Baher S. Haroun - Allen TX, US

International Classification:

G02F 1/29
G01S 7/481
G01S 17/08

Abstract:

In described examples, a system (e.g., a security system or a vehicle operator assistance system) is configured to configure a phased spatial light modulator (SLM) to generate a diffraction pattern. A coherent light source is optically coupled to direct coherent light upon the SLM. The SLM is configured to project diffracted coherent light toward a region of interest. An optical element is configured to focus the diffracted coherent light toward the at least one region of interest.

US Patent:

20200212854, Jul 2, 2020

Filed:

Dec 26, 2018

Appl. No.:

16/232494

Inventors:

- Dallas TX, US
Nirmal C. WARKE - Saratoga CA, US
David P. MAGEE - Allen TX, US
Ali KIAEI - San Jose CA, US
Baher S. HAROUN - Allen TX, US
Ajay SINGHVI - Stanford CA, US

International Classification:

H03F 3/195
G01S 17/10
G01S 7/481

Abstract:

A sensor circuit includes a sensor array. The sensor array includes a sensor row that includes a first sensor cell, a second sensor cell, and an output stage of a distributed amplifier circuit. The first sensor cell includes a first photodetector, and a first preamplifier stage of the distributed amplifier circuit. The first preamplifier stage is coupled to the first photodetector, and is configured to amplify a signal received from the first photodetector. The second sensor cell includes a second photodetector, and a second preamplifier stage of the distributed amplifier circuit. The second preamplifier stage is coupled to the second photodetector, and is configured to amplify a signal received from the second photodetector. The output stage of the distributed amplifier circuit is coupled to the first and second sensor cells, and is configured to amplify a signal received from the first preamplifier stage and the second preamplifier stage.

US Patent:

20180348345, Dec 6, 2018

Filed:

Jun 5, 2017

Appl. No.:

15/613835

Inventors:

- Dallas TX, US
Nirmal C. WARKE - Saratoga CA, US
David P. MAGEE - Allen TX, US

International Classification:

G01S 7/486
G01S 17/10

Abstract:

An optical distance measurement system includes a transmission circuit and a receive circuit. The transmission circuit is configured to generate narrowband intensity modulated light transmission signals over a first band of frequencies and direct the narrowband light transmission signal toward a target object. The receive circuit is configured to receive reflected light off the target object, convert the reflected light into a current signal proportional to the intensity of the reflected light, filter frequencies outside a second band of frequencies from the current signal to create a filtered current signal, and convert the filtered current signal into a voltage signal. The second band of frequencies corresponds with the first band of frequencies.

US Patent:

20170357000, Dec 14, 2017

Filed:

Jun 9, 2017

Appl. No.:

15/619048

Inventors:

- Dallas TX, US
Nirmal C. Warke - Saratoga CA, US
David P. Magee - Allen TX, US
Jeffrey Scott Farris - Flower Mound TX, US
Patrick Ian Oden - McKinney TX, US

International Classification:

G01S 17/10
G01S 7/484

Abstract:

In described examples, a spatial light modulator (SLM) receives light from a field of view. The SLM includes a two-dimensional array of picture elements in rows and columns. In response to a transmit scan beam that illuminates the field of view, a portion of the two-dimensional array is impacted by light reflected from a region of interest. The portion of the two-dimensional array is determined. Light is directed from the portion of the two-dimensional array to a photodiode. Light that impacts the two-dimensional array outside the portion is directed away from the photodiode.