JPS5622117A - Electric power supply system for cmos memory circuit - Google Patents
Electric power supply system for cmos memory circuitInfo
- Publication number
- JPS5622117A JPS5622117A JP9729279A JP9729279A JPS5622117A JP S5622117 A JPS5622117 A JP S5622117A JP 9729279 A JP9729279 A JP 9729279A JP 9729279 A JP9729279 A JP 9729279A JP S5622117 A JPS5622117 A JP S5622117A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- power supply
- voltage
- supplied
- cmos
- 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
Links
Landscapes
- Power Sources (AREA)
- Static Random-Access Memory (AREA)
Abstract
PURPOSE: To prevent the reverse flowing of the power supply voltage and the like, by supplying the system power supply voltage via the DC boosting circuit to the CMOS memory circuit having the battery backup circuit and thus obtaining the working voltage of the CMOS circuit at the low power supply voltage of the system side.
CONSTITUTION: The system power supply voltage VCC to be supplied to CMOS memory circuit 3 is supplied via DC boosting circuit 1, and this boosting output is supplied in the form of power supply voltage VDD to circuit 3 through diode D1 which constitutes the power supply switching circuit. At the same time, battery voltage VB is also supplied in the form of voltage VDD to circuit 3 via diode D2 constituting the power supply circuit. Then circuit 1 is actuated by voltage VCC, and the level of input signal Vin which is supplied to circuit 3 from memory control circuit 2 is regulated by voltage VCC to prevent the latch-up phenomenon of CMOS. At the same time, a margin is secured for the power supply switching and setting voltage.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9729279A JPS5622117A (en) | 1979-08-01 | 1979-08-01 | Electric power supply system for cmos memory circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9729279A JPS5622117A (en) | 1979-08-01 | 1979-08-01 | Electric power supply system for cmos memory circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5622117A true JPS5622117A (en) | 1981-03-02 |
| JPS6353566B2 JPS6353566B2 (en) | 1988-10-24 |
Family
ID=14188417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9729279A Granted JPS5622117A (en) | 1979-08-01 | 1979-08-01 | Electric power supply system for cmos memory circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5622117A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58191058A (en) * | 1982-04-30 | 1983-11-08 | Sony Corp | Storage device |
| JPS59121418A (en) * | 1982-12-28 | 1984-07-13 | Nitsuko Ltd | Back-up power supply circuit for ic memory |
| JPS6082328U (en) * | 1983-11-08 | 1985-06-07 | 三洋電機株式会社 | memory device |
| JPS60123923A (en) * | 1983-12-07 | 1985-07-02 | Mitsubishi Electric Corp | Power supply controlling circuit of microcomputer system |
| JPS61126328U (en) * | 1984-10-26 | 1986-08-08 |
-
1979
- 1979-08-01 JP JP9729279A patent/JPS5622117A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58191058A (en) * | 1982-04-30 | 1983-11-08 | Sony Corp | Storage device |
| JPH0561658B2 (en) * | 1982-04-30 | 1993-09-06 | Sony Corp | |
| JPS59121418A (en) * | 1982-12-28 | 1984-07-13 | Nitsuko Ltd | Back-up power supply circuit for ic memory |
| JPS6082328U (en) * | 1983-11-08 | 1985-06-07 | 三洋電機株式会社 | memory device |
| JPS60123923A (en) * | 1983-12-07 | 1985-07-02 | Mitsubishi Electric Corp | Power supply controlling circuit of microcomputer system |
| JPH046974B2 (en) * | 1983-12-07 | 1992-02-07 | Mitsubishi Electric Corp | |
| JPS61126328U (en) * | 1984-10-26 | 1986-08-08 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6353566B2 (en) | 1988-10-24 |
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