Daniel Hart Donoghue

US Patent:

7414493, Aug 19, 2008

Filed:

May 10, 2007

Appl. No.:

11/747053

Inventors:

Abid Hussain - Methuen MA, US
Daniel J. Donoghue - Tewksbury MA, US
Eric S. Gray - Westford MA, US

Assignee:

Fairchild Semiconductor Corporation - South Portland ME

International Classification:

H01P 3/08
H01P 5/12

US Classification:

333116, 333109

Abstract:

A system with an RFin terminal and an RFout terminal includes an output matching network. The system further includes a coupler having a thru arm connected between the output matching network and the RFout terminal, and a coupled arm connected to a detector circuit. The coupler further includes a stack of first and second dielectric materials having different dielectric constants. The stack of first and second dielectric materials extends over a top surface of a substrate. The thru arm and the coupled arm extend over the stack of first and second dielectric materials in the same plane parallel to a surface of the substrate.

US Patent:

7564325, Jul 21, 2009

Filed:

Feb 15, 2007

Appl. No.:

11/675564

Inventors:

Abid Hussain - Methuen MA, US
Daniel J. Donoghue - Tewksbury MA, US
Eric S. Gray - Westford MA, US

Assignee:

Fairchiled Semiconductor Corporation - South Portland ME

International Classification:

H01P 5/18
H01P 3/08

US Classification:

333116, 333238

Abstract:

A coupler includes a substrate and a stack of first and second dielectric layers extending over a top surface of the substrate. The first dielectric layer comprises different dielectric material than the second dielectric layer. Two conductive lines extend over the stack of first and second dielectric layers, and are formed in the same plane parallel to a surface of the substrate.

US Patent:

46442960, Feb 17, 1987

Filed:

Apr 23, 1985

Appl. No.:

6/726091

Inventors:

Ian Crossley - Andover MA
Daniel Donoghue - Tewksbury MA
Robert Goldswasser - Andover MA
John Miley - Hollis NH
Frank Spooner - Concord MA

International Classification:

H03L 700
H03L 702

US Classification:

331 1R

Abstract:

A voltage controlled oscillator includes a VCO chip that is a monolithic circuit with a Gunn diode and varactor diode intercoupled by a resonant circuit. A detector/discriminator/power divider chip is coupled to the VCO chip through a directional coupler and is a monolithic circuit having a pair of discriminator diodes and amplitude detector diode on a semi-insulating substrate with associated circuit components. Connected-together electrodes of the discriminator diodes are connected to one output of the power divider. An electrode of the amplitude detector diode is connected to the other output of the power divider. Stagger-tuned resonant circuits are coupled to the other electrodes of the discriminator diodes. Conducting portions forming low pass filters couple the amplitude detector diode and the discriminator detector diodes to respective outputs. The outputs of the discriminator and amplitude detector are coupled to respective inputs of an analog divider that provides a ratio signal that is coupled to the - input of a differential amplifier.

US Patent:

47898879, Dec 6, 1988

Filed:

Sep 29, 1986

Appl. No.:

6/912975

Inventors:

Ian Crossley - Andover MA
Daniel Donoghue - Tewksbury MA
Robert Goldwasser - Andover MA
John Miley - Hollis NH
Frank Spooner - Concord MA

Assignee:

Alpha Industries, Inc. - Woburn MA

International Classification:

H01L 2906
H01L 2712
H01L 2726

US Classification:

357 55

Abstract:

A voltage controlled oscillator includes a VCO chip that is a monolithic circuit with a Gunn diode and varactor diode intercoupled by a resonant circuit. A detector/discriminator/power divider chip is coupled to the VCO chip through a directional coupler and is a monolithic circuit having a pair of discriminator diodes and amplitude detector diode on a semi-insulating substrate with associated circuit components. Connected-together electrodes of the discriminator diodes are connected to one output of the power divider. An electrode of the amplitude detector diode is connected to the other output of the power divider. Stagger-tuned resonant circuits are coupled to the other electrodes of the discriminator diodes. Conducting portions forming low pass filters couple the amplitude detector diode and the discriminator detector diodes to respective outputs. The outputs of the discriminator and amplitude detector are coupled to respective inputs of an analog divider that provides a ratio signal that is coupled to the - input of a differential amplifier.

US Patent:

46370684, Jan 13, 1987

Filed:

Feb 8, 1985

Appl. No.:

6/699918

Inventors:

Ian Crossley - Andover MA
Daniel Donoghue - Tewksbury MA
Steven Mittleman - Framingham MA
Seth Nash - Boston MA

Assignee:

Alpha Industries, Inc. - Woburn MA

International Classification:

H04B 126

US Classification:

455327

Abstract:

A hybrid ring mixer includes an annular conducting ring on a gallium arsenide substrate coated on the bottom with a conducting layer to comprise a strip transmission line. Three conductors spaced by 120. degree. extend radially outward from the annular ring to define local oscillator, signal input and i-f ports, respectively. A pair of conductors spaced by substantially 120. degree. extend radially inward to comprise diode ports. A conducting surface inside the annular ring is grounded and has circular sectors of different radius bounded by radii extending from the center of the ring and bisecting the signal and local oscillator ports, respectively. The sector of larger radius is located in the 120. degree. sector between the signal and local oscillator ports. Mesa diodes are connected between each of the diode ports and the sector of smaller radius.