John E Nugent

US Patent:

47076658, Nov 17, 1987

Filed:

Jan 31, 1984

Appl. No.:

6/575429

Inventors:

John L. Nugent - Essex MD
George C. Rush - Sykesville MD
Norman G. Matthews - Cockeysville MD

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

H03B 1900
H04B 1132

US Classification:

328 14

Abstract:

A signal generator for high level low noise signals in which the preferred embodiment of the invention utilizes the output signal of a low noise crystal oscillator as a fundamental reference signal. The fundamental reference signal is multiplied to generate a series of coherent reference signals. Additionally, one of the coherent reference signals is coupled as an input signal to a divide circuit to generate at the output of the divide circuit a plurality of coherent low frequency reference signals. The coherent reference signals and the low frequency coherent reference signals are utilized by a synthesizer to generate a plurality of coherent signals having a frequency determined by the synthesizer. The output signal of the synthesizer is combined with one or more of the reference signals to generate the microwave output signal which is stepped from a minimum to a maximum value in equal increments.

US Patent:

48433497, Jun 27, 1989

Filed:

Apr 27, 1988

Appl. No.:

7/186867

Inventors:

John L. Nugent - Essex MD
Norman G. Matthews - Sparks MD

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

H03B 530

US Classification:

331116R

Abstract:

A crystal-controlled oscillator operable at a direct UHF frequency includes an amplifier having a feedback circuit formed from an SC-cut crystal and an impedance network. The impedance network provides an impedance load for the cyrstal, and the values of the individual components forming the impedance network are selected to provide an overall inductive load for the SC-cut crystal. Inductively loading the cyrstal permits the crystal to oscillate at the C mode or UHF frequency mode, and prevents unwanted crystal oscillation at the B mode or VHF mode.