JPS5636227A - Alternating current two-wire detection switch - Google Patents
Alternating current two-wire detection switchInfo
- Publication number
- JPS5636227A JPS5636227A JP11219279A JP11219279A JPS5636227A JP S5636227 A JPS5636227 A JP S5636227A JP 11219279 A JP11219279 A JP 11219279A JP 11219279 A JP11219279 A JP 11219279A JP S5636227 A JPS5636227 A JP S5636227A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- zener
- turned
- constant
- circuit
- 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
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
- H03K17/725—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region for ac voltages or currents
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Thyristor Switches And Gates (AREA)
- Electronic Switches (AREA)
Abstract
PURPOSE:To obtain a switch with a small residual voltage, by connecting a constant-voltage circuit in parallel to an SCR and by turning on and off this constant- voltage circuit to control the SCR. CONSTITUTION:When the output of detecting circuit 2 is ''H'', transistor 44 is turned on, and the constant-voltage circuit including transistor 41 operates, and the output is supplied to detecting circuit 2. At this time, since the Zener voltage of Zener diode 33 is higher than the Zener voltage of Zener diode 43, SCR32 is not turned on. When the output of detecting circuit 2 becomes ''L'', transistor 44 is turned off; and the rectified voltage exceeds the Zener voltage of Zener diode 33, SCR32 is turned on, and electric power is supplied to load 5. The residual voltage between terminals 11 and 12 can be reduced by adjusting the Zener voltage of Zener diodes 33 and 43.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11219279A JPS5636227A (en) | 1979-08-31 | 1979-08-31 | Alternating current two-wire detection switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11219279A JPS5636227A (en) | 1979-08-31 | 1979-08-31 | Alternating current two-wire detection switch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5636227A true JPS5636227A (en) | 1981-04-09 |
Family
ID=14580557
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11219279A Pending JPS5636227A (en) | 1979-08-31 | 1979-08-31 | Alternating current two-wire detection switch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5636227A (en) |
-
1979
- 1979-08-31 JP JP11219279A patent/JPS5636227A/en active Pending
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