JPS57145433A - Time limiting circuit - Google Patents
Time limiting circuitInfo
- Publication number
- JPS57145433A JPS57145433A JP2997581A JP2997581A JPS57145433A JP S57145433 A JPS57145433 A JP S57145433A JP 2997581 A JP2997581 A JP 2997581A JP 2997581 A JP2997581 A JP 2997581A JP S57145433 A JPS57145433 A JP S57145433A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- counter
- capacitor
- output
- sampling
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/28—Modifications for introducing a time delay before switching
Landscapes
- Electronic Switches (AREA)
Abstract
PURPOSE:To obtain a high-precision, time-extended circuit by adding an oscillating circuit, composed of a voltage comparator, and a counter to a CR charging and discharging circuit, and then controlling the oscillating circuit or counter by a sampling signal. CONSTITUTION:A DC power source E charge a capacitor C through a charging resistance R. When the voltage of the capacitor C rises above a prescribed value, an oscillating circuit 2 turns on a transistor (TR) 4 to discharge the capacitor C. A counter 3 integrates output pulses from the circuit 2. A sampling circuit 9 samples the output of an AC power source 7 and applies its output to an oscillation control circuit 6. The circuit 6 turns on the TR4 synchronously with the signal from the circuit 9. Therefore, the sampling rate of the circuit 9 is adjusted to control the number of pulses counted by the counter 3, so a time limit is adjusted.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2997581A JPS57145433A (en) | 1981-03-04 | 1981-03-04 | Time limiting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2997581A JPS57145433A (en) | 1981-03-04 | 1981-03-04 | Time limiting circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57145433A true JPS57145433A (en) | 1982-09-08 |
Family
ID=12290954
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2997581A Pending JPS57145433A (en) | 1981-03-04 | 1981-03-04 | Time limiting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57145433A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4737669A (en) * | 1986-07-31 | 1988-04-12 | Rca Corporation | Slow-start system for a control circuit |
-
1981
- 1981-03-04 JP JP2997581A patent/JPS57145433A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4737669A (en) * | 1986-07-31 | 1988-04-12 | Rca Corporation | Slow-start system for a control circuit |
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