Allen D Wilcox
Engineers in Bountiful, UT

4636718, Jan 13, 1987

Jul 20, 1984

6/632728

Joseph H. Labrum - West Jordan UT
Allen D. Wilcox - Bountiful UT

Sperry Corporation - Blue Bell PA

G01R 23165, G01R 2317

324 77K

This invention is directed to a spectrum analyzer system which is laser-driven and which includes a standard Bragg cell and a standard photo-diode array as the output detector. In this system, the Bragg cell is driven by a bandwidth expansion circuit which receives the typical R. F. input signal, supplies it to a variable center frequency filter or to a bank of filters which then down-converts the signal and supplies the signal to a real time signal storage memory at a first signal rate. The signals are retrieved from the memory at a second, much greater signal rate, up-converted and supplied to the Bragg cell to affect the operation thereof in the usual fashion. This time base compression circuit has the effect of producing an improved optical spectrum analyzer with expanded frequency resolution.

4648135, Mar 3, 1987

Jul 20, 1984

6/632635

Joseph H. Labrum - West Jordan UT
Allen D. Wilcox - Bountiful UT

Sperry Corporation - Blue Bell PA

H04B 900, H01J 4014

455619

A signal handling system of improved dynamic range wherein a logarithmic circuit is interposed between a photo-diode array and other output circuitry.