JPS55128162A - Power supply voltage drop detector - Google Patents
Power supply voltage drop detectorInfo
- Publication number
- JPS55128162A JPS55128162A JP3546879A JP3546879A JPS55128162A JP S55128162 A JPS55128162 A JP S55128162A JP 3546879 A JP3546879 A JP 3546879A JP 3546879 A JP3546879 A JP 3546879A JP S55128162 A JPS55128162 A JP S55128162A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- supply voltage
- voltage
- gate
- output
- 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
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Logic Circuits (AREA)
- Electronic Switches (AREA)
Abstract
PURPOSE: To make possible to setting of the detection voltage flowing the dispersion of lower operating voltage of logic circuits by a signal of detecting the drop in the power supply voltage from the output of a high gain amplification circuit to which a divided voltage is inputted from a division circuit comprising an enhancement type and a depression type MISFETs.
CONSTITUTION: A high gain amplification circuit 1 is composed of enhancement type MISFETs Q1WQ3 as the amplifying elements and depresion type FETs Q4W Q6 to which a gate and a drain are connected as a load. The division circuit 2 is made up of an enhancement type MISFET Q7 having the drain and the gate connected to a power supply voltage terminal Vcc and a depression type MISFET Q8 having the source and the gate connected to the reference voltage terminal (OV) connected to each other in series. With such an arrangement, the output Va of divided voltage is obtained with shifted level of the power supply voltage. The output Va is fed to the gate of FET Q1 in the circuit 1 to yield the detection signal for drop in the power supply voltage.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3546879A JPS55128162A (en) | 1979-03-28 | 1979-03-28 | Power supply voltage drop detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3546879A JPS55128162A (en) | 1979-03-28 | 1979-03-28 | Power supply voltage drop detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55128162A true JPS55128162A (en) | 1980-10-03 |
Family
ID=12442606
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3546879A Pending JPS55128162A (en) | 1979-03-28 | 1979-03-28 | Power supply voltage drop detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55128162A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61165664A (en) * | 1985-01-18 | 1986-07-26 | Matsushita Electric Ind Co Ltd | Power source voltage detection circuit |
US5008566A (en) * | 1988-11-30 | 1991-04-16 | Nec Corporation | Power supply voltage drop detection circuit for use in EEPROM memory |
JPH06230044A (en) * | 1993-01-29 | 1994-08-19 | Ricoh Co Ltd | Power supply voltage detecting device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5311068A (en) * | 1976-07-16 | 1978-02-01 | Sharp Corp | Voltage detection circuit |
-
1979
- 1979-03-28 JP JP3546879A patent/JPS55128162A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5311068A (en) * | 1976-07-16 | 1978-02-01 | Sharp Corp | Voltage detection circuit |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61165664A (en) * | 1985-01-18 | 1986-07-26 | Matsushita Electric Ind Co Ltd | Power source voltage detection circuit |
US5008566A (en) * | 1988-11-30 | 1991-04-16 | Nec Corporation | Power supply voltage drop detection circuit for use in EEPROM memory |
JPH06230044A (en) * | 1993-01-29 | 1994-08-19 | Ricoh Co Ltd | Power supply voltage detecting device |
US6246272B1 (en) | 1993-01-29 | 2001-06-12 | Ricoh Company, Ltd. | Power supply voltage detecting apparatus |
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