JPS5570129A - Level detector circuit - Google Patents

Level detector circuit

Info

Publication number
JPS5570129A
JPS5570129A JP14400478A JP14400478A JPS5570129A JP S5570129 A JPS5570129 A JP S5570129A JP 14400478 A JP14400478 A JP 14400478A JP 14400478 A JP14400478 A JP 14400478A JP S5570129 A JPS5570129 A JP S5570129A
Authority
JP
Japan
Prior art keywords
potential
input signal
level
gate
level detection
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
JP14400478A
Other languages
Japanese (ja)
Other versions
JPS5842967B2 (en
Inventor
Tadaaki Masumori
Hiroshi Egawa
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP14400478A priority Critical patent/JPS5842967B2/en
Publication of JPS5570129A publication Critical patent/JPS5570129A/en
Publication of JPS5842967B2 publication Critical patent/JPS5842967B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16504—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the components employed
    • G01R19/16519—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the components employed using FET's

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

PURPOSE:To secure the level detection of a high sensitivity by changing the reference voltage automatically in accordance with the potential of the input signal, reducing the coupling conditions of the level detection circuit to the input signal system circuit and then lessening the unbalance of the load. CONSTITUTION:Input terminal 12 is connected to level detector circuit part 19 via gate MOSFETT6 of gate circuit part 18. Then the reference potential is generated through part 19 to detect the potential change of the input signal. The FF comprising MOSFETT7 and T8 is provided at part 19, and the sources of FETT7 and T8 are connected in common and then earthed via MOSFETT3 along with their gates connected to each other. The gate is furthermore connected to MOSFETT9 which generates the reference potential, and the drain of T9 is connected to power source VD. At the same time, joints 21 and 22 between TrFETT7/T8 and T9 each are connected to MOSFETT10 and T11 of output circuit part 23. Then the high potential level delivered from TTL logic element 24 which delivers the high potential level during the holding period is detected through part 19, thus carrying out the level detection of a high sensitivity.
JP14400478A 1978-11-20 1978-11-20 level detection circuit Expired JPS5842967B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14400478A JPS5842967B2 (en) 1978-11-20 1978-11-20 level detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14400478A JPS5842967B2 (en) 1978-11-20 1978-11-20 level detection circuit

Publications (2)

Publication Number Publication Date
JPS5570129A true JPS5570129A (en) 1980-05-27
JPS5842967B2 JPS5842967B2 (en) 1983-09-22

Family

ID=15352067

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14400478A Expired JPS5842967B2 (en) 1978-11-20 1978-11-20 level detection circuit

Country Status (1)

Country Link
JP (1) JPS5842967B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH021085A (en) * 1989-02-10 1990-01-05 Hitachi Ltd Data input device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5986299A (en) * 1983-10-04 1984-05-18 富士機械製造株式会社 Holder for positioning electronic part
JPS60178540U (en) * 1984-05-02 1985-11-27 三洋電機株式会社 parts posture correction device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH021085A (en) * 1989-02-10 1990-01-05 Hitachi Ltd Data input device

Also Published As

Publication number Publication date
JPS5842967B2 (en) 1983-09-22

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