USA As Represented by Secretary of the Navy

Bobby R Jarrett

William M Waters

In guidance systems such as bang-bang missiles or laser guided bombs, the cessary dynamic range is gained by switching between arrays of comparators as a function of signal strength.

Switched comparator system for obtaining dynamic range

A system for improving the dynamic range of guidance systems for missiles d bombs by replacing pseudo-logarithmic amplifiers in the processing circuits with transimpedance amplifiers having feed back impedance operating in conjunction with lower bandwidth type logarithmic amplifiers in the log of the ratio circuits.

Alternate approach for obtaining dynamic range in monopulse guidance

The application of peristaltic charge-coupled-devices to an analog delay e provides an ultra high speed n-bit propagatory analog-to-digital converter system. The system also includes somewhat unconventional ECL weighted current source digital-to-analog converters. The analog delay line comprised of the peristaltic charge-coupled-devices is clocked in exact synchronism with a digital delay line. Operation at conversion rates above 100 MHz are made possible.

N-bit propagatary analog-to-digital converter system

A digital coherent detector for sampling a band-limited IF signal directly o obtain its in-phase and quadrature coefficients I(t) and Q(t) without using quadrature channels comprising:

Digital coherent detector

A digital m of n correlation device using signal and reference shaft registers, modulo 2 adders, unique 1-bit D/A converters, and single resistor analog summing provides a very fast correlation product for pulse compression modulations such as phase or frequency shift keying. The compression ratio for the digital m of n correlation device, according to the present invention, is 168:1 (equal to the number of bits). The device is capable of bit rates in excess of 100 Mbps and is well suited for LSI fabrication.

Digital m of n correlation device having increased bit rate

A demodulator for decoding the Manchester code is described in which the bit rate is maximized by using a one shot set up for a pulse width less than one-half the bit period. Control of the one-shot is established so that it is clocked at the bit rate but not at twice the bit rate, in order to receive high data rates serially over a single fiber optic channel.

High-speed Manchester code demodulator

Methods of driving a light-emitting diode (LED) or an injection diode at very high digital data rates using high speed emitter coupled logic (ECL) gates.

Growing community of inventors

Fredericksburg, VA, United States of America

Bobby R Jarrett