Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1983-07-26
1985-12-31
Dobeck, B.
Communications: electrical
Audible indication
Percussion-type sound producer
340347AD, 307260, H03K 1302
Patent
active
045624240
ABSTRACT:
An integrator circuit comprising reset means by which, when it is detected that an integrator output V.sub.p for an input analog signal coincides with a plus or minus reference value, the integral output is reset to the vicinity of the middle of the plus and minus reference values, in effect, without interrupting the integrating operation; a circuit which produces a pulse each time coincidence is detected; and a circuit which produces a direction signal indicating whether the coincidence results from an increase or a decrease of the integral input.
The pulses produced in the state in which the direction signal is indicating an increase are counted up, and the pulses produced in the state in which the direction signal is indicating a decrease are counted down, whereby the precise integral value of the input analog signal can be detected.
REFERENCES:
patent: Re28706 (1976-02-01), Dorey
patent: 3585634 (1971-06-01), Sharples
patent: 3999123 (1976-12-01), Thoener
patent: 4034364 (1977-07-01), Fukuda
patent: 4057796 (1977-11-01), Hoogendoorn
patent: 4180807 (1979-12-01), Eichelberger et al.
Hagiwara Yoshimune
Kita Yuzo
Ogawa Kazuyoshi
Takagi Katsuaki
Torii Shuichi
Dobeck B.
Hitachi , Ltd.
Hitachi Microcomputer & Engineering, Ltd.
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