Signal processing apparatus generating a signal having a fequenc

Details Signal processing apparatus generating a signal having a fequenc Signal processing apparatus generating a signal having a fequenc

1993-08-02

1996-06-18

Metjahic, Safet

Communications: electrical

Condition responsive indicating system

Specific condition

356356, G08B 2100, G01B 1102

Patent

active

055282270

ABSTRACT:
A signal processing method includes the steps of inputting first to N-th 2-phase sinusoidal wave signals, where N is a natural number (N.ltoreq.2) and an m-th 2-phase sinusoidal wave signal has an m-th frequency where m is a natural number and satisfies a relation of 1.ltoreq.m.ltoreq.N, and processing the first to N-th 2-phase sinusoidal signals by product summation or product differentiation of the first to N-th 2-phase sinusoidal wave signals to produce at least one signal having a frequency equal to a sum of the frequencies of the first to N-th 2-phase sinusoidal wave signals.

REFERENCES:
patent: 4676645 (1987-06-01), Taniguchi et al.
patent: 5067089 (1991-11-01), Ishii et al.
patent: 5235406 (1993-08-01), Ishii et al.
patent: 5347355 (1994-09-01), Eguchi

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