PT72892A - Ignition circuit for semiconductor switch - has piezoelectric chip coupling AC excitation signal to control input of switch - Google Patents
Ignition circuit for semiconductor switch - has piezoelectric chip coupling AC excitation signal to control input of switchInfo
- Publication number
- PT72892A PT72892A PT7289281A PT7289281A PT72892A PT 72892 A PT72892 A PT 72892A PT 7289281 A PT7289281 A PT 7289281A PT 7289281 A PT7289281 A PT 7289281A PT 72892 A PT72892 A PT 72892A
- Authority
- PT
- Portugal
- Prior art keywords
- electrodes
- switch
- semiconductor switch
- piezoelectric chip
- control input
- Prior art date
Links
Landscapes
- Generation Of Surge Voltage And Current (AREA)
Abstract
A piezoelectric chip (1) has two electrodes (13,14) on one side and two corresp. electrodes (13',14') on the other side. The piezoelectric chip decouples the input control circuit (9) from the semiconductor switch (10), which may be a triac, a thyristor or a MOS power FET. One pair (13,13') of electrodes acts as input and is connected to the output of the control circuit and the other pair (14,14') acts as output and is connected to the semiconductor switch. The electrodes may take various forms, e.g. concentric rings, rectangular or semicircular. An additional pair of electrodes may be incorporated to provide a second output for controlling a second semiconductor switch. The frequency of the a.c. voltage produced by the control circuit and the resonant frequency of the piezoelectric chip are matched to one another for a given vibration mode of the chip.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803015301 DE3015301A1 (en) | 1980-04-21 | 1980-04-21 | Ignition circuit for semiconductor switch - has piezoelectric chip coupling AC excitation signal to control input of switch |
DE3035503A DE3035503C2 (en) | 1980-09-19 | 1980-09-19 | Piezo ignition device for thyristors and triacs |
Publications (2)
Publication Number | Publication Date |
---|---|
PT72892A true PT72892A (en) | 1981-05-01 |
PT72892B PT72892B (en) | 1982-03-29 |
Family
ID=25785074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PT7289281A PT72892B (en) | 1980-04-21 | 1981-04-20 | ADVANCED DEVICE AND PIEZO NODE COUPLER WITH GALVANIC DECOUPLING |
Country Status (1)
Country | Link |
---|---|
PT (1) | PT72892B (en) |
-
1981
- 1981-04-20 PT PT7289281A patent/PT72892B/en unknown
Also Published As
Publication number | Publication date |
---|---|
PT72892B (en) | 1982-03-29 |
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