TWI256538B - New soft-start circuit - Google Patents

New soft-start circuit

Info

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
Application number
TW93117102A
Other languages
Chinese (zh)
Other versions
TW200540593A (en
Inventor
Chien-Lung Lee
Original Assignee
Analog Integrations Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Analog Integrations Corp filed Critical Analog Integrations Corp
Priority to TW93117102A priority Critical patent/TWI256538B/en
Publication of TW200540593A publication Critical patent/TW200540593A/en
Application granted granted Critical
Publication of TWI256538B publication Critical patent/TWI256538B/en

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.
TW93117102A 2004-06-14 2004-06-14 New soft-start circuit TWI256538B (en)

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)

* Cited by examiner, † Cited by third party
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

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