Waveform generator

Details Waveform generator Waveform generator

1990-09-04

1991-10-08

Hellner, Mark

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

With particular circuit

For frequency modulation

342 25, G01S 1389

Patent

active

050558501

ABSTRACT:
A waveform generator (12') is responsive to a reference clock signal input for producing an output waveform which is a linear FM waveform. A reference clock signal is supplied to the generator which performs a double integration to obtain the phase of the output signal. The phase resulting from the double integration is used to obtain the sine of the phase using a lookup table. The sine of the phase is input to digital-to-analogue (D/A) converter, and the output from the D/A converter is filtered using a bandwidth matched to the bandwidth of the transmitted signal. The generator is useful in radar systems for area mapping and target identification.

REFERENCES:
patent: 4068178 (1978-01-01), Tunzi
patent: 4123719 (1978-10-01), Hopwood et al.
patent: 4142245 (1979-02-01), Baron
patent: 4200872 (1980-04-01), Sifferlen et al.
patent: 4724418 (1988-02-01), Weindling

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