Method and apparatus for accurate, high speed pulse-echo measure

Details Method and apparatus for accurate, high speed pulse-echo measure Method and apparatus for accurate, high speed pulse-echo measure

1992-06-12

1993-06-22

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

Sensitivity time control

342 91, 342 92, 342174, G01S 734, G01S 740

Patent

active

052219283

ABSTRACT:
An apparatus comprises a signal input and a sampler and analog-to-digital (A/D) converter coupled to the signal input. The sampler and A/D converter forms a digital pre-look signal from an input signal. The apparatus further comprises a digital memory coupled to the sampler and A/D converter. The digital memory stores sensitivity time control (STC) data and provides specific STC data in response to the digital pre-look signal. The apparatus further comprises a digital-to-analog converter coupled to the digital memory. The digital-to-analog converter converts the specific digital STC data to a first analog STC signal. The apparatus also includes a first comparator coupled to the signal input and to the digital-to-analog converter. The first comparator has an input for receiving the first analog STC signal. The first comparator compares a present input signal to the first analog STC signal to provide a detection signal.

REFERENCES:
patent: 3176293 (1965-03-01), Nolen et al.
patent: 3659290 (1972-04-01), Bourque
patent: 4169263 (1979-09-01), Hooker, Jr.
patent: 4415897 (1983-11-01), Kennedy
patent: 4435707 (1984-03-01), Clark
patent: 4994811 (1991-02-01), Moreira
patent: 5105195 (1992-04-01), Conrad
patent: 5160933 (1992-11-01), Hager

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