JPS54162577A - Low voltage detecting circuit - Google Patents
Low voltage detecting circuitInfo
- Publication number
- JPS54162577A JPS54162577A JP7094678A JP7094678A JPS54162577A JP S54162577 A JPS54162577 A JP S54162577A JP 7094678 A JP7094678 A JP 7094678A JP 7094678 A JP7094678 A JP 7094678A JP S54162577 A JPS54162577 A JP S54162577A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- vth
- time
- detecting
- low voltage
- 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
- Emergency Protection Circuit Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
PURPOSE: To shorten the time required for maintenance of output voltage after cutting off of input and obtain a miniature and economical device by expediting the low voltage detecting time at the cutting off of input.
CONSTITUTION: The time constant at the charging of the capacitor 2 of an integrating circuit is made small by detecting that power source input voltage has become lower than the specified voltage level VTH2 lower than the voltage level which is instantaneously lowered by high frequency noise or the like and lower than normal voltage VTH1. Thereby the time when the detecting voltage lowers from VTH2 down to VTH1 may be shortened and the low voltage detecting time expedited.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7094678A JPS54162577A (en) | 1978-06-14 | 1978-06-14 | Low voltage detecting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7094678A JPS54162577A (en) | 1978-06-14 | 1978-06-14 | Low voltage detecting circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54162577A true JPS54162577A (en) | 1979-12-24 |
Family
ID=13446169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7094678A Pending JPS54162577A (en) | 1978-06-14 | 1978-06-14 | Low voltage detecting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54162577A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0523150U (en) * | 1991-08-30 | 1993-03-26 | ミツミ電機株式会社 | Voltage detection circuit |
US5943635A (en) * | 1997-12-12 | 1999-08-24 | Scenix Semiconductor Inc. | System and method for programmable brown-out detection and differentiation |
-
1978
- 1978-06-14 JP JP7094678A patent/JPS54162577A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0523150U (en) * | 1991-08-30 | 1993-03-26 | ミツミ電機株式会社 | Voltage detection circuit |
US5943635A (en) * | 1997-12-12 | 1999-08-24 | Scenix Semiconductor Inc. | System and method for programmable brown-out detection and differentiation |
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