Circuit for monitoring a digital signal generator

Details Circuit for monitoring a digital signal generator Circuit for monitoring a digital signal generator

1980-12-30

1983-05-24

Atkinson, Charles E.

Excavating

364719, 371 53, G06F 1110

Patent

active

043853854

ABSTRACT:
A monitoring circuit for monitoring a digital signal generator which generates signals that are linear combinations of sinewave signals each of whose frequencies are defined by a coefficient K that is proportional to the corresponding frequency. The generator including means for storing the coefficients corresponding to all the signals to be emitted, the coefficients having an integer portion and a fraction portion whose number of digits defines the smallest possible coefficient value which corresponds to a signal of minimum frequency fm such that all signals emitted by the generator are at frequencies which are multiples of the frequency fm. The monitoring circuit includes a redundancy calculator circuit (EX, RR) connected to the output S of the generator (G), and comparator means (CC) comparing the redundancy calculated by the redundancy calculator circuit with a stored constant theoretical value.

REFERENCES:
patent: 3582633 (1971-06-01), Webb
patent: 3680069 (1972-07-01), Newmann et al.
patent: 3905030 (1975-09-01), Lavanant et al.
patent: 3924181 (1975-12-01), Alderson
patent: 3988670 (1976-10-01), Gariazzo
patent: 3999049 (1976-12-01), Roche et al.
patent: 4108359 (1978-08-01), Proto

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