JPS54100627A - Status holding circuit - Google Patents
Status holding circuitInfo
- Publication number
- JPS54100627A JPS54100627A JP774178A JP774178A JPS54100627A JP S54100627 A JPS54100627 A JP S54100627A JP 774178 A JP774178 A JP 774178A JP 774178 A JP774178 A JP 774178A JP S54100627 A JPS54100627 A JP S54100627A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- power failure
- capacitor
- state before
- terminal
- 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
- 239000003990 capacitor Substances 0.000 abstract 4
- 238000007599 discharging Methods 0.000 abstract 2
- 239000003208 petroleum Substances 0.000 abstract 1
Landscapes
- Power Sources (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
- Logic Circuits (AREA)
Abstract
PURPOSE: To obtain a digital circuit which holds a final operation state before a power failure and recovers into the state before the power failure when fed with a current, by a capacitor for status holding and its charging circuit.
CONSTITUTION: In the circuit shown in the figure, capacitor C1 is charged by way of transistor Q1 and diode D1 when terminal A is at level L, and discharged when via transistor Q3 when terminal B is at level H; respective states are outputted to terminal C. Now, if a power failure occurs at point Y with capacitor C1 charged, all transistors turn OFF and charges in the capacitor are being held. Since point P is at level H at point Z when the circuit recovers from the power failure, the circuit turns into the state before the power failure immediately. Adding a discharging circuit with an adequate discharging time constant to this circuit obtains a circuit which holds the state before a power failure for a constant time, so that a circuit can be obtained which is effective for the control of a pot-type petroleum burning system.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP774178A JPS54100627A (en) | 1978-01-25 | 1978-01-25 | Status holding circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP774178A JPS54100627A (en) | 1978-01-25 | 1978-01-25 | Status holding circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54100627A true JPS54100627A (en) | 1979-08-08 |
Family
ID=11674119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP774178A Pending JPS54100627A (en) | 1978-01-25 | 1978-01-25 | Status holding circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54100627A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984002407A1 (en) * | 1982-12-07 | 1984-06-21 | Motorola Inc | Data processor version validation |
-
1978
- 1978-01-25 JP JP774178A patent/JPS54100627A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984002407A1 (en) * | 1982-12-07 | 1984-06-21 | Motorola Inc | Data processor version validation |
| US4493035A (en) * | 1982-12-07 | 1985-01-08 | Motorola, Inc. | Data processor version validation |
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