JPS5781721A - Pulse input detector - Google Patents

Pulse input detector

Info

Publication number
JPS5781721A
JPS5781721A JP15861580A JP15861580A JPS5781721A JP S5781721 A JPS5781721 A JP S5781721A JP 15861580 A JP15861580 A JP 15861580A JP 15861580 A JP15861580 A JP 15861580A JP S5781721 A JPS5781721 A JP S5781721A
Authority
JP
Japan
Prior art keywords
pulse
frequency
pulse signal
input terminal
detected
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.)
Pending
Application number
JP15861580A
Other languages
Japanese (ja)
Inventor
Hiroshi Mizuguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15861580A priority Critical patent/JPS5781721A/en
Publication of JPS5781721A publication Critical patent/JPS5781721A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/22—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
    • H03K5/26—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being duration, interval, position, frequency, or sequence

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

PURPOSE:To detect the presence or absence of pluse with use of no capacitor, by using a digital frequency comparator which receives the application of a pulse having a lower frequency than the detected pulse at the input terminal of one side. CONSTITUTION:A digital frequency comparator 10 produces the 1st DC level output when the frequency of the pulse signal applied to the 1st input terminal A is lower than the frequency of the pulse signal applied to the 2nd input terminal B. Otherwise the 2nd DC level output is produced. Such comparator 10 consists of an RSFF14, D type FFs 15 and 18, inverters 11 and 17 plus an AND gate 16. Then the pulse signal to be detected is applied to the terminal A; and the pulse signal of a frequency lower than the detected pulse is applied to the terminal B. The frequencies of both pulse signals are compared with each other to obtain a detection output.
JP15861580A 1980-11-10 1980-11-10 Pulse input detector Pending JPS5781721A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15861580A JPS5781721A (en) 1980-11-10 1980-11-10 Pulse input detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15861580A JPS5781721A (en) 1980-11-10 1980-11-10 Pulse input detector

Publications (1)

Publication Number Publication Date
JPS5781721A true JPS5781721A (en) 1982-05-21

Family

ID=15675572

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15861580A Pending JPS5781721A (en) 1980-11-10 1980-11-10 Pulse input detector

Country Status (1)

Country Link
JP (1) JPS5781721A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009183503A (en) * 2008-02-07 2009-08-20 Mitsubishi Electric Corp Rice cooker
JP2009195486A (en) * 2008-02-21 2009-09-03 Toshiba Home Technology Corp Rice cooker

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5172477A (en) * 1974-12-20 1976-06-23 Sony Corp SHUHASUUISOBENBETSU KAIRO

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5172477A (en) * 1974-12-20 1976-06-23 Sony Corp SHUHASUUISOBENBETSU KAIRO

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009183503A (en) * 2008-02-07 2009-08-20 Mitsubishi Electric Corp Rice cooker
JP2009195486A (en) * 2008-02-21 2009-09-03 Toshiba Home Technology Corp Rice cooker

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