TW200612654A - A direct current fan start up circuit - Google Patents
A direct current fan start up circuitInfo
- Publication number
- TW200612654A TW200612654A TW093131355A TW93131355A TW200612654A TW 200612654 A TW200612654 A TW 200612654A TW 093131355 A TW093131355 A TW 093131355A TW 93131355 A TW93131355 A TW 93131355A TW 200612654 A TW200612654 A TW 200612654A
- Authority
- TW
- Taiwan
- Prior art keywords
- direct current
- switching device
- circuit
- fan start
- current fan
- Prior art date
Links
Landscapes
- Control Of Direct Current Motors (AREA)
- Amplifiers (AREA)
Abstract
A direct current (DC) fan start up circuit includes a digital/analog converter (DAC) device for converting a digital signal from a controlling chip into an analog signal, a voltage-dividing device, an operational amplifier (OA), a switching device for controlling start up of the DC fan, and a feedback device for automatically adjusting the current flowing through the switching device. Wherein the output signal of the DAC device is inputted into one input port of the OA via the voltage-dividing device. The switching device is connected to the output port of the OA, and the output signal of the switching device is inputted into another input port of the OA through the feedback device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW93131355A TWI321396B (en) | 2004-10-15 | 2004-10-15 | A direct current fan start up circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW93131355A TWI321396B (en) | 2004-10-15 | 2004-10-15 | A direct current fan start up circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200612654A true TW200612654A (en) | 2006-04-16 |
TWI321396B TWI321396B (en) | 2010-03-01 |
Family
ID=45073837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW93131355A TWI321396B (en) | 2004-10-15 | 2004-10-15 | A direct current fan start up circuit |
Country Status (1)
Country | Link |
---|---|
TW (1) | TWI321396B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI410043B (en) * | 2007-12-31 | 2013-09-21 | Hon Hai Prec Ind Co Ltd | Control circuit for computer fan |
-
2004
- 2004-10-15 TW TW93131355A patent/TWI321396B/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI410043B (en) * | 2007-12-31 | 2013-09-21 | Hon Hai Prec Ind Co Ltd | Control circuit for computer fan |
Also Published As
Publication number | Publication date |
---|---|
TWI321396B (en) | 2010-03-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |