JPS54143029A - Power source voltage detector circuit - Google Patents
Power source voltage detector circuitInfo
- Publication number
- JPS54143029A JPS54143029A JP5168678A JP5168678A JPS54143029A JP S54143029 A JPS54143029 A JP S54143029A JP 5168678 A JP5168678 A JP 5168678A JP 5168678 A JP5168678 A JP 5168678A JP S54143029 A JPS54143029 A JP S54143029A
- Authority
- JP
- Japan
- Prior art keywords
- inv
- constant
- stage
- power source
- 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
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
PURPOSE: To obtain a simple-constitution power source voltage detector circuit which can be incorporated in an integrated circuit unit easily, by connecting two two-terminal electronic elements different in voltage and current characteristics in series.
CONSTITUTION: Transistor QA of a constant-current element having constant- current-type characteristic line A and transistor QB of a constant-current element having constant-voltage-type characteristic line B or TrQA and QB different in characteristic such as a Tr having linear characteristic line C are connected in series, and connection point VO of TrQA and QB is connected to the input terminal of the next stage the output stage. By this constitution, three-stage inverters InV1 to InV3 are constituted to constitute the integrated circuit which detects the potential of connection point V' in the output stage of the third-stage inverter InV3. Then, the potential of connection point V' after passing through three-stage inverters InV1 to InV3 is made of a rapidly lowered characteristic, and the voltage for power source voltage VcC over a given threshold value is detected accurately.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5168678A JPS54143029A (en) | 1978-04-28 | 1978-04-28 | Power source voltage detector circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5168678A JPS54143029A (en) | 1978-04-28 | 1978-04-28 | Power source voltage detector circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54143029A true JPS54143029A (en) | 1979-11-07 |
Family
ID=12893764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5168678A Pending JPS54143029A (en) | 1978-04-28 | 1978-04-28 | Power source voltage detector circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54143029A (en) |
Cited By (1)
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 |
-
1978
- 1978-04-28 JP JP5168678A patent/JPS54143029A/en active Pending
Cited By (1)
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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