Christopher R Vale

7170357, Jan 30, 2007

Mar 4, 2005

11/071443

Michael M. Driscoll - Woodstock MD, US
Karl M. Metzger - Westminster MD, US
Christopher R. Vale - Elkridge MD, US
Norman G. Matthews - Pasadena MD, US

Northrop Grumman Corporation - Los Angeles CA

H03B 5/32

331158, 331116 R, 331116 FE, 331135, 331162

A crystal oscillator having a crystal filter with multiple crystals in a ladder configuration, resonant at a desired operating frequency. An oscillatory signal loop feedback path includes a voltage controlled phase shifter operable to shift the phase of the signal in the feedback loop in response to an applied control voltage. The feedback loop also includes a loop phase shift circuit to ensure that the feedback signal is a multiple of 360, and a band pass mode selection circuit for eliminating unwanted frequencies.

7415495, Aug 19, 2008

Mar 12, 2004

10/798378

Cheri A. Anaclerio - Baltimore MD, US
Christopher R. Vale - Elkridge MD, US

Northrop Grumman Corporation - Los Angeles CA

G06G 7/02

708819

A method for determining a filter that is very selective and having linear phase is described. The method starts with choosing a pole constellation in the complex frequency plane in a unique manner so that a desired passband phase of the filter is linear while preserving the desired magnitude. The method seeks to design filters that have ideal responses in both gain and phase or gain and time. This process is done methodically by finding locations of poles that yield sensible compromises between the extremes. It also makes full use of well-known traditional characteristics of the filters at the extremes.

40485951, Sep 13, 1977

Jan 22, 1976

5/651305

Christopher R. Vale - Elkridge MD

Westinghouse Electric Corporation - Pittsbugh PA

H03H 932
H03H 748

333 72

A filter array is provided for extracting velocity information from the return pulse of a Doppler radar system. The array consists of a plurality of two-pole, bandpass crystal filter networks directly connected in parallel, the filter networks including crystal resonators and all but one of the networks having reactances in series with the resonators. The crystal resonators are identical in all of the networks and the reactances change progressively in successive networks in such a manner that adjacent filter networks respond to contiguous frequency bands.

57639515, Jun 9, 1998

Jul 22, 1996

8/681345

Robin E. Hamilton - Millersville MD
Paul G. Kennedy - Grasonville MD
Christopher R. Vale - Elkridge MD

Northrop Grumman Corporation - Los Angeles CA

H01L 2334

257714

A liquid cooling system contained completely on a circuit board assembly. The liquid cooling system uses microchannels etched within the circuit board, those microchannels being filled with electrically conductive fluid that is pumped by a non-mechanical, magnetic pump. The pump can be separate from the device on the circuit board which is to be cooled or it can be integrated with the device that is to be cooled. In the latter circumstance, the same current which flows through the electronic device is the current which generates the Lorentz force that pumps the electrically conductive fluid through the microchannel.

43284973, May 4, 1982

Aug 11, 1980

6/176624

Christopher R. Vale - Elkridge MD

Westinghouse Electric Corp. - Pittsburgh PA

G01S 736

343 18E

A jamming analysis and transmission selection system for a radar wherein the frequencies present in the environment are sampled during a discrete time interval following each radar transmission; and utilizes a surface acoustic wave device having a plurality of spaced groups of interdigitated fingers on a substrate wherein each of said groups has a finger width and spacing to be resonant at each of a plurality of anticipated different interfering frequencies. The output of the device is sampled following each discrete time interval to identify the presence of the selected interfering frequencies to change the transmission frequency of the radar transmitter to a non-interfering frequency.

39731499, Aug 3, 1976

Jan 10, 1975

5/540195

Christopher R. Vale - Elkridge MD
Thelma J. Isaacs - Murrysville PA

Westinghouse Electric Corporation - Pittsburgh PA

H01L 4118

310 95

A crystal resonator is disclosed of a single crystal of the approximate composition Tl. sub. 3 BX. sub. 4 having two parallel surfaces normal to a zero temperature coefficient of frequency direction and having an electrode mounted on each surface, where B is vanadium, niobium, or tantalum, and X is sulfur or selenium. A filter is disclosed of a crystal resonator coupled to a capacitor or more than one crystal resonator in series each coupled to a capacitor. A voltage controlled crystal oscillator resonator is disclosed of a crystal resonator in parallel with an inductor and a varactor.

50846876, Jan 28, 1992

Dec 3, 1979

6/099360

Christopher R. Vale - Elkridge MD
John W. Taylor - Baltimore MD

Westinghouse Electric Corp. - Pittsburgh PA

H03H 900
H04B 1100

333153

A unitary surface acoustic wave device for continuous quadraphase coding of a high amplitude video impulse with provisions for controlling the rise and fall times of such impulse.

42175631, Aug 12, 1980

Dec 22, 1975

5/642802

Christopher R. Vale - Elkridge MD

Westinghouse Electric Corp. - Pittsburgh PA

H03H 930
H03H 926
H03H 904
H01L 4122

333150

A surface wave phase correlator comprises a pair of substantially identical launch and receiving filter electrode patterns disposed on a common piezoelectric substrate. The correlator is employed with receiving and processing circuitry in a monopulse radar system to provide relative phase information for target calculations by a digital processor. Fast rise and fall times for the correlator output signals enable rapid digital processing of incoming target signals.