JPH0360515A - Voltage detecting circuit - Google Patents

Voltage detecting circuit

Info

Publication number
JPH0360515A
JPH0360515A JP1196393A JP19639389A JPH0360515A JP H0360515 A JPH0360515 A JP H0360515A JP 1196393 A JP1196393 A JP 1196393A JP 19639389 A JP19639389 A JP 19639389A JP H0360515 A JPH0360515 A JP H0360515A
Authority
JP
Japan
Prior art keywords
voltage
current
potential
flow
mirror circuit
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
JP1196393A
Other languages
Japanese (ja)
Other versions
JP2893738B2 (en
Inventor
Masashi Shoji
Original Assignee
Nec 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 Nec Corp filed Critical Nec Corp
Priority to JP1196393A priority Critical patent/JP2893738B2/en
Publication of JPH0360515A publication Critical patent/JPH0360515A/en
Application granted granted Critical
Publication of JP2893738B2 publication Critical patent/JP2893738B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE: To operate a current mirror circuit with a simple circuitry and further with a low power supply voltage by composing the current mirror circuit of the first and second transistors and further setting the driving capacity of the second transistor larger than that of the fourth transistor.
CONSTITUTION: When a voltage VIN to be detected is lower in comparison with a set voltage VD only a fine current flows to transistors N1 and N2. How ever, according to a ratio between the capacity of the N1 and N2, a current to flow to the N1 is larger than a current to flow to the N2. Thus, since a current to flow to the current mirror circuit is larger than the current to flow to the N2, an output voltage Vout is the almost same potential as the potential of a potential supply terminal 1. When the voltage VIN to be detected is higher in comparison with the set voltage VD, the output voltage Vout is almost the same potential as the potential of a potential supply terminal 2 by operation reverse to the above mentioned operation. Accordingly, the current mirror circuit can be operated with the voltage lower in comparison with the conven tional voltage.
COPYRIGHT: (C)1991,JPO&Japio
JP1196393A 1989-07-28 1989-07-28 Voltage detection circuit Expired - Fee Related JP2893738B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1196393A JP2893738B2 (en) 1989-07-28 1989-07-28 Voltage detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1196393A JP2893738B2 (en) 1989-07-28 1989-07-28 Voltage detection circuit

Publications (2)

Publication Number Publication Date
JPH0360515A true JPH0360515A (en) 1991-03-15
JP2893738B2 JP2893738B2 (en) 1999-05-24

Family

ID=16357125

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1196393A Expired - Fee Related JP2893738B2 (en) 1989-07-28 1989-07-28 Voltage detection circuit

Country Status (1)

Country Link
JP (1) JP2893738B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013074626A (en) * 2011-09-27 2013-04-22 Robert Bosch Gmbh Method and apparatus for inspecting performance of supply voltage switch for driving circuit
CN110501548A (en) * 2019-07-18 2019-11-26 上海芯旺微电子技术有限公司 A kind of micro energy lose low-voltage detection circuit for MCU

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5335465A (en) * 1976-09-14 1978-04-01 Sony Corp Differential input type trigger circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5335465A (en) * 1976-09-14 1978-04-01 Sony Corp Differential input type trigger circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013074626A (en) * 2011-09-27 2013-04-22 Robert Bosch Gmbh Method and apparatus for inspecting performance of supply voltage switch for driving circuit
CN110501548A (en) * 2019-07-18 2019-11-26 上海芯旺微电子技术有限公司 A kind of micro energy lose low-voltage detection circuit for MCU
CN110501548B (en) * 2019-07-18 2020-10-30 上海芯旺微电子技术有限公司 Micro-power-consumption low-voltage detection circuit for MCU

Also Published As

Publication number Publication date
JP2893738B2 (en) 1999-05-24

Similar Documents

Publication Publication Date Title
JPH04162111A (en) Dc power circuit
JPH01190026A (en) Driving circuit fed with low power
JPH0360515A (en) Voltage detecting circuit
JPH02280413A (en) Basic logic circuit
JPS64817A (en) Logic circuit
JPH03129884A (en) Led drive circuit
JPH03210815A (en) Cmos output circuit
JPH03147421A (en) Semiconductor integrated circuit
JPS62296213A (en) Constant voltage circuit
JPH0262106A (en) Operational amplifier
JPH04157372A (en) Window type voltage comparator circuit
JPH01261918A (en) Semiconductor circuit
JPH02305223A (en) Inverter circuit
JPH02109423A (en) Ttl output circuit
JPH03169115A (en) Semiconductor integrated circuit
JPH04366772A (en) Overcurrent detection circuit of dc power supply
JPH01169516A (en) Converter circuit for inverter device
JPH0354914A (en) Semiconductor integrated circuit device for driving
JPS63277469A (en) Constant voltage generating circuit
JPH0442492A (en) Semiconductor circuit
JPH03106115A (en) Driver circuit
JPH0442778A (en) One-transistor type converter
JPH0449712A (en) Driving circuit
JPS62283716A (en) Driving circuit for capacitive load
JPH03242513A (en) Time sharing driving system for sensor

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees