JPS55118220A - Level detection circuit - Google Patents

Level detection circuit

Info

Publication number
JPS55118220A
JPS55118220A JP2529879A JP2529879A JPS55118220A JP S55118220 A JPS55118220 A JP S55118220A JP 2529879 A JP2529879 A JP 2529879A JP 2529879 A JP2529879 A JP 2529879A JP S55118220 A JPS55118220 A JP S55118220A
Authority
JP
Japan
Prior art keywords
level
vtc5
ratio
vdd
transistors
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
JP2529879A
Other languages
Japanese (ja)
Inventor
Hiroshi Morito
Takeshi Ando
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2529879A priority Critical patent/JPS55118220A/en
Publication of JPS55118220A publication Critical patent/JPS55118220A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied
    • H03K17/223—Modifications for ensuring a predetermined initial state when the supply voltage has been applied in field-effect transistor switches

Landscapes

  • Manipulation Of Pulses (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To enable to set the detection level freely with good accuracy, with two logic circuits different from the ratio. CONSTITUTION:Tr5, Tr7 are enhancement transistors and Tr6, Tr8 are depletion transistors and Tr5 to Tr8 constitute the inverter respectively. Since the gate of Tr5 is connected to the VDD line, if the output of Tr5 is higher than the threshold level VTC5 consisting of Tr5 and Tr6, the state shown logical low level and logical high level is outputed if lower than VTC5. Further, if both the inverters have the equal threshold value, logic operation can be made with the state that VDD level is lower than the threshold level VTC7 of Tr7, Tr8. The level detection output is obtained of VDD between VTC5 and VTC7. The detection level can be determined in the ratio of Tr5, Tr6. Further, the ratio is selected with the shape of transistors.
JP2529879A 1979-03-05 1979-03-05 Level detection circuit Pending JPS55118220A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2529879A JPS55118220A (en) 1979-03-05 1979-03-05 Level detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2529879A JPS55118220A (en) 1979-03-05 1979-03-05 Level detection circuit

Publications (1)

Publication Number Publication Date
JPS55118220A true JPS55118220A (en) 1980-09-11

Family

ID=12162104

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2529879A Pending JPS55118220A (en) 1979-03-05 1979-03-05 Level detection circuit

Country Status (1)

Country Link
JP (1) JPS55118220A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5008566A (en) * 1988-11-30 1991-04-16 Nec Corporation Power supply voltage drop detection circuit for use in EEPROM memory

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52144230A (en) * 1976-05-27 1977-12-01 Mitsubishi Electric Corp C-mos initial reset circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52144230A (en) * 1976-05-27 1977-12-01 Mitsubishi Electric Corp C-mos initial reset circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5008566A (en) * 1988-11-30 1991-04-16 Nec Corporation Power supply voltage drop detection circuit for use in EEPROM memory

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