David A Rich

53075170, Apr 26, 1994

Oct 17, 1991

7/778501

David A. Rich - Woodmere NY

H04B 110

455306

An improved adaptive notch filter for removing undesired cochannel FM interference includes in-phase and quadrature signal processing paths in which the undesired FM signal is translated to zero frequency, i. e. to DC. In each of the in-phase and quadrature phase signal paths, a first multiplier translates the input frequency spectrum in a dynamic manner so that the frequency of the undesired FM signal is always centered on DC. The undesired signal, now at DC, is filtered out by a high pass filter with a sharp rolloff. The output of the high pass filter is remultiplied in a second multiplier to translate the desired FM signal back to the original position in the frequency spectrum. In order to eliminate an unwanted difference frequency remodulation signal at the output of the second multiplier, the quadrature phase signal path performs a parallel operation on the same input signal, but with a quadrature phase (90 degree phase shift) control signal. The output the in-phase and quadrature signal processing circuits are combined in an adder circuit to cancel the unwanted difference frequency remodulation signal.

49375776, Jun 26, 1990

Jun 23, 1987

7/065939

David Rich - Woodmere NY
Peter Staley - Kings Park NY

Microchip Technology Inc. - Chandler AZ

H03M 302

341143

A feedback coder, which employs simple CMOS push/pull amplifiers as gain elements, along with a bistable circuit, in its preferred embodiment takes the form of a second-order delta-sigma modulator. The output of the modulator is converted into pulse code modulated words by a finite impluse response filter which incorporates a partial coefficient generator utilizing simplified logic. The generator output is provided to an accumulator in which the stage operate at reduced speed. A simple multiplexer generates a serial output. The entire converter can be integrated on a semiconductor chip of relatively small area.

47960043, Jan 3, 1989

Feb 14, 1986

6/829624

David Rich - Woodmere NY
Peter Staley - Kings Park NY
David Coyne - Fife, GB6

General Instrument Corp. - New York NY

H03M 302

341143

A feedback coder, which employs simple CMOS push/pull amplifiers as gain elements, along with a bistable circuit, in its preferred embodiment takes the form of a second-order delta-sigma modulator. The output of the modulator is converted into pulse code modulated words by a finite impulse response filter which incorporates a partial coefficient generator utilizing simplified logic. The generator output is provided to an accumulator in which the stages operate at reduced speed. A simple multiplexer generates a serial output. The entire converter can be integrated on a semiconductor chip of relatively small area.

48600121, Aug 22, 1989

Jun 22, 1987

7/065263

David Rich - Woodmere NY
Peter Staley - Kings Park NY

Microchip Technology Incorporated - Chandler AZ

H03M 302

341143

A feedback coder, which employs simple CMOS push/pull amplifiers as gain elements, along with a bistable circuit, in its preferred embodiment takes the form of a second-order delta-sigma modulator. The output of the modulator is converted into pulse code modulated words by a finite impulse response filter which incorporates a partial coefficient generator utilizing simplified logic. The generator output is provided to an accumulator in which the stages operate at reduced speed. A simple multiplexer generates a serial output. The entire converter can be integrated on a semiconductor chip of relatively small area.

20190002337, Jan 3, 2019

Dec 20, 2016

16/064531

- Danbury CT, US
Charles Robinson - West Seneca NY, US
Javier E. Gonzalez - Rock Hill SC, US
Lawrence W. Kosowski - West Falls NY, US
David A. Rich - Nashua NH, US
Brian C. LaCourse - Pepperell MA, US
Signo T. Reis - Rolla MO, US

C03C 8/24
C04B 37/02
B32B 15/04
B32B 15/18

An apparatus can include a ceramic component, a metal component, and a glass sealing material that bonds the ceramic and metal components to each other. In an embodiment, the coefficients of thermal expansion of the components and glass sealing material can be within 4 ppm/ C. of one another. The metal component may be relatively oxidation resistant. The glass sealing material may have a relatively low amount of an amorphous phase as compared to one or more crystalline phases within the glass sealing material. The apparatuses can exhibit good bond strength even after long term exposure to high temperature, thermal cycling to a high temperature, or both. In an embodiment, the metal component may allow another metal component of a different composition to be used without a significant impact on the integrity of the bonded apparatus.