JPS56138330A - Noise rejector for constant input judgement - Google Patents

Noise rejector for constant input judgement

Info

Publication number
JPS56138330A
JPS56138330A JP4232580A JP4232580A JPS56138330A JP S56138330 A JPS56138330 A JP S56138330A JP 4232580 A JP4232580 A JP 4232580A JP 4232580 A JP4232580 A JP 4232580A JP S56138330 A JPS56138330 A JP S56138330A
Authority
JP
Japan
Prior art keywords
output
noise
set
counter
input
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP4232580A
Inventor
Satoru Suzaki
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP4232580A priority Critical patent/JPS56138330A/en
Publication of JPS56138330A publication Critical patent/JPS56138330A/en
Application status is Granted legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K5/00Manipulating pulses not covered by one of the other main groups in this subclass
    • H03K5/125Discriminating pulses
    • H03K5/1252Suppression or limitation of noise or interference

Abstract

PURPOSE:To avoid the malfunction due to noise and to increase the reliability of device, by processing the input signal digitally and changing the set value according to the state of noise. CONSTITUTION:The input is fetched to the synchronizing signal generating circuit 3 within a given time, the number of times when the input is 1, is counted at the counter 4, the counting value is controlled with the synchronizing signal obtained from the generating circuit 3 and it is supplied to the output device from the latch circuit of the counter 4. Further, the set values A, B set to the 1st and 2nd setters 8, 9 are inputted to the output device 12, and the output N of the counter 4 and the set values A, B obtained from the setters 8, 9 are compared at the 1st and 2nd comparators of the output device 12, and output 1 is outputted at output N > set value A, and output O is outputted at output N < set value B. Further, according to the condition of noise, the set values A, B are changed, allowing to prevent the malfunction due to noise.
JP4232580A 1980-03-31 1980-03-31 Noise rejector for constant input judgement Granted JPS56138330A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4232580A JPS56138330A (en) 1980-03-31 1980-03-31 Noise rejector for constant input judgement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4232580A JPS56138330A (en) 1980-03-31 1980-03-31 Noise rejector for constant input judgement

Publications (1)

Publication Number Publication Date
JPS56138330A true JPS56138330A (en) 1981-10-28

Family

ID=12632849

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4232580A Granted JPS56138330A (en) 1980-03-31 1980-03-31 Noise rejector for constant input judgement

Country Status (1)

Country Link
JP (1) JPS56138330A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6236925A (en) * 1985-03-29 1987-02-17 Stanley Electric Co Ltd Sampling system for digital data
EP0343317A2 (en) * 1988-05-26 1989-11-29 Hitachi, Ltd. Filter circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6236925A (en) * 1985-03-29 1987-02-17 Stanley Electric Co Ltd Sampling system for digital data
EP0343317A2 (en) * 1988-05-26 1989-11-29 Hitachi, Ltd. Filter circuit
EP0343317A3 (en) * 1988-05-26 1990-01-24 Hitachi, Ltd. Filter circuit
US4961014A (en) * 1988-05-26 1990-10-02 Toshiro Kasahara Filter circuit utilizing reversible counter for generating a satisfactory hysteresis

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