TW200639416A - Circuit providing steady current with high voltage isolation and resistance measurement apparatus with circuit thereof - Google Patents
Circuit providing steady current with high voltage isolation and resistance measurement apparatus with circuit thereofInfo
- Publication number
- TW200639416A TW200639416A TW094115038A TW94115038A TW200639416A TW 200639416 A TW200639416 A TW 200639416A TW 094115038 A TW094115038 A TW 094115038A TW 94115038 A TW94115038 A TW 94115038A TW 200639416 A TW200639416 A TW 200639416A
- Authority
- TW
- Taiwan
- Prior art keywords
- current
- circuit
- protection module
- high voltage
- steady current
- Prior art date
Links
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
A resistance measurement apparatus includes a circuit that providing steady current with high voltage isolation; a voltage measurement unit which can measure the two end voltages of the resistances being tested; a calculating unit; a circuit with steady current and high voltage isolation including a current generator with providing steady current and a protection module. The current that generated by current generator can be put out to the protection module then the resistance being tested, and the protection module by means of its internal diode for impeding positive input voltage. When negative input voltage is applied to the system, the current-guiding unit of the protection module is brought into the non-conduction state for impeding negative voltage flow into the current generator, and the protection element of the protection module can be conducted while negative voltage is applied, thus the system applying said negative voltage on the loaded unit and connected to ground. The current is divided into the calculating unit with a difference of the two voltages, thus to obtain the resistance value of the resistance being tested.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW94115038A TWI277743B (en) | 2005-05-10 | 2005-05-10 | Circuit providing steady current with high voltage isolation and resistance measurement apparatus with circuit thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW94115038A TWI277743B (en) | 2005-05-10 | 2005-05-10 | Circuit providing steady current with high voltage isolation and resistance measurement apparatus with circuit thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200639416A true TW200639416A (en) | 2006-11-16 |
TWI277743B TWI277743B (en) | 2007-04-01 |
Family
ID=38626028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW94115038A TWI277743B (en) | 2005-05-10 | 2005-05-10 | Circuit providing steady current with high voltage isolation and resistance measurement apparatus with circuit thereof |
Country Status (1)
Country | Link |
---|---|
TW (1) | TWI277743B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI461706B (en) * | 2011-09-12 | 2014-11-21 | Nidec Read Corp | Impedance measurement device |
-
2005
- 2005-05-10 TW TW94115038A patent/TWI277743B/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI461706B (en) * | 2011-09-12 | 2014-11-21 | Nidec Read Corp | Impedance measurement device |
Also Published As
Publication number | Publication date |
---|---|
TWI277743B (en) | 2007-04-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |