Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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:an A/D converter for sampling and digitizing an IF signal r(t)=I(t) cos 2.pi. f.sub.o t-Q(t) sin 2.pi. f.sub.o t at a sampling frequency of f.sub.s =2f.sub.o /(M-1/2)=2W. where M is an integer, W is the bandwidth of the input signal, and f.sub.o is the center frequency of the signal, so that the sin and cos sinosoidal terms alternately go to zero and one respectively, thereby alternately yielding the sample values I(t) and then Q(t);a finite impulse response digital filter for estimating the value r(t) for the coefficient whose sinosoidal term has gone to zero in a given sample with the function ##EQU1## where s(t-n/2W) is a self truncating interpolation function; and a switching circuit for properly setting the signs for r(t.sub.m) and r(.about.t.sub.

Abstract: 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.

Abstract: 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.

Abstract: 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.