TWI256538B - New soft-start circuit - Google Patents
New soft-start circuitInfo
- Publication number
- TWI256538B TWI256538B TW93117102A TW93117102A TWI256538B TW I256538 B TWI256538 B TW I256538B TW 93117102 A TW93117102 A TW 93117102A TW 93117102 A TW93117102 A TW 93117102A TW I256538 B TWI256538 B TW I256538B
- Authority
- TW
- Taiwan
- Prior art keywords
- mosfet
- voltage
- soft
- current mirror
- start circuit
- Prior art date
Links
Abstract
The present invention provides a soft-start circuit, which comprises a current source with the input connected with a first voltage; a first current mirror with the input connected with the output of the current source, and the shared source connected with a second voltage, which is formed by coupling a first metal oxide semiconductor field effect transistor (MOSFET) and a second MOSFET; a third MOSFET with the gate connected with the shared gate of the first current mirror, the source connected with a second voltage; a second current mirror with the input connected with the drain of the third MOSFET, the output connected with the output of the first current mirror, and the shared source connected with the first voltage, which is formed by coupling a fourth MOSFET with a fifth MOSFET; and, a capacitor with one end connected with the second voltage; by suitably configuring the aspect ratio of channel area for the first MOSFET, the second MOSFET, the third MOSFET, the fourth MOSFET, and the fifth MOSFET, so as to reduce the current flowing through the capacitor, and further reduce the ratio of soft-start voltage to time for the soft-start circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW93117102A TWI256538B (en) | 2004-06-14 | 2004-06-14 | New soft-start circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW93117102A TWI256538B (en) | 2004-06-14 | 2004-06-14 | New soft-start circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200540593A TW200540593A (en) | 2005-12-16 |
TWI256538B true TWI256538B (en) | 2006-06-11 |
Family
ID=37614696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW93117102A TWI256538B (en) | 2004-06-14 | 2004-06-14 | New soft-start circuit |
Country Status (1)
Country | Link |
---|---|
TW (1) | TWI256538B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI556557B (en) * | 2014-09-12 | 2016-11-01 | 原景科技股份有限公司 | Power supplying circuit and soft-start circuit of the same |
CN116301189A (en) * | 2023-03-01 | 2023-06-23 | 南京米乐为微电子科技有限公司 | Current compensation circuit |
-
2004
- 2004-06-14 TW TW93117102A patent/TWI256538B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
TW200540593A (en) | 2005-12-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |