TW200719763A - Power indicator driving circuit - Google Patents

Power indicator driving circuit

Info

Publication number
TW200719763A
TW200719763A TW094138811A TW94138811A TW200719763A TW 200719763 A TW200719763 A TW 200719763A TW 094138811 A TW094138811 A TW 094138811A TW 94138811 A TW94138811 A TW 94138811A TW 200719763 A TW200719763 A TW 200719763A
Authority
TW
Taiwan
Prior art keywords
transistor
branch circuit
led
signal
load resistor
Prior art date
Application number
TW094138811A
Other languages
Chinese (zh)
Other versions
TWI324497B (en
Inventor
Yong-Xing You
Feng-Long He
Hai-Qing Zhou
Original Assignee
Hon Hai Prec Ind Co Ltd
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 Hon Hai Prec Ind Co Ltd filed Critical Hon Hai Prec Ind Co Ltd
Priority to TW94138811A priority Critical patent/TWI324497B/en
Publication of TW200719763A publication Critical patent/TW200719763A/en
Application granted granted Critical
Publication of TWI324497B publication Critical patent/TWI324497B/en

Links

Landscapes

  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

A power indicator driving circuit includes an LED (light-emitting diode), a first load resistor, a second load resistor, a first branch circuit, and a second branch circuit. The LED (light-emitting diode) indicates a power management state of a computer. The first load resistor is connected between a cathode of the LED and a power source. The second load resistor is connected between an anode of the LED and the power source. The first branch circuit is controlled by a first signal and a second signal. The first branch circuit is connected between the cathode of the LED and a ground. The first branch circuit includes a first transistor and a second transistor. The first transistor is connected to the second transistor in series. The second branch circuit is controlled by the second signal and a third signal. The second branch circuit is connected between the anode of the LED and the ground. The second branch circuit includes a third transistor and a forth transistor. The third transistor is connected to the forth transistor in series.
TW94138811A 2005-11-04 2005-11-04 Power indicator driving circuit TWI324497B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW94138811A TWI324497B (en) 2005-11-04 2005-11-04 Power indicator driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW94138811A TWI324497B (en) 2005-11-04 2005-11-04 Power indicator driving circuit

Publications (2)

Publication Number Publication Date
TW200719763A true TW200719763A (en) 2007-05-16
TWI324497B TWI324497B (en) 2010-05-01

Family

ID=45074175

Family Applications (1)

Application Number Title Priority Date Filing Date
TW94138811A TWI324497B (en) 2005-11-04 2005-11-04 Power indicator driving circuit

Country Status (1)

Country Link
TW (1) TWI324497B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI680692B (en) * 2018-09-21 2019-12-21 魔力歐生技有限公司 Switch control device with an asymmetrical current

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI680692B (en) * 2018-09-21 2019-12-21 魔力歐生技有限公司 Switch control device with an asymmetrical current

Also Published As

Publication number Publication date
TWI324497B (en) 2010-05-01

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees