Linear frequency modulation apparatus and technique

Details Linear frequency modulation apparatus and technique Linear frequency modulation apparatus and technique

1983-11-21

1999-07-06

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

H03B 2300

Patent

active

H00017973

ABSTRACT:
Linear frequency modulation having a large time-bandwidth product and an remely linear frequency versus time waveform, is provided by a feedback technique utilizing a linear ramp voltage generator whose output is summed with a correction voltage to drive a voltage controlled oscillator to output the LFM waveform. Part of the LFM waveform is fed back through a digital discriminator for error signal generation and comparison with a preset value associated with the output slope linearity, thus yielding the basis for generating the correction voltage.

REFERENCES:
patent: 3514718 (1970-05-01), Newton
patent: 3992679 (1976-11-01), Isono
patent: 4038612 (1977-07-01), Borofka et al.
patent: 4205316 (1980-05-01), Peperone
patent: 4245196 (1981-01-01), Peebles, Jr. et al.
patent: 4310809 (1982-01-01), Buck et al.

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