# US 7,608,941 B2 · Adaptor circuit for power supply

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- Number: US 7,608,941 B2
- Document ID: US7608941B2
- Status: Granted
- Kind: B2
- Application number: 12/038,819
- Filed: 2008-02-28
- Published: 2009-07-02
- Granted: 2009-10-27
- Earliest claimed: 2007-12-26
- Assignees: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.; Hon Hai Precision Industry Co., Ltd.
- Inventors: Jin-Liang Xiong
- Web page: https://patentgrep.com/patent/US7608941B2

## CPC

- G06F 1/26: Power supply means, e.g. regulation thereof (for memories G11C)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

An exemplary adaptor circuit of a power supply includes a power connector, a first electric switch, a second electric switch, and an output terminal. The power connector includes a power good pin and a power pin. The first electric switch has a first terminal connected to the power good pin of the power connector, a second terminal connected to the power pin of the power connector, and a grounded third terminal. The second electric switch has a first terminal connected to the second terminal of the first electric switch, a second terminal connected to a first voltage terminal via a first transmission line or a second voltage terminal via a second transmission line by selectively mounting a connection component to close an open segment of the corresponding transmission line, and a grounded third terminal. The output terminal outputs a driving voltage signal to chipsets on a motherboard.

## Claims

### Claim 1

An adaptor circuit for a power supply comprising:
a power connector adapted for coupling to an Advanced Technology Extended (ATX) power supply, the power connector comprising a power good pin and a power pin;
a first electric switch having a first terminal connected to the power good pin of the power connector, a second terminal connected to the power pin of the power connector via a first resistor, and a grounded third terminal;
a second electric switch having a first terminal connected to the second terminal of the first electric switch, a second terminal connected to a first voltage terminal via a first transmission line or a second voltage terminal via a second transmission line by selectively mounting a connection component to close an open segment of the corresponding transmission line according to a specification of chipsets on a motherboard, and a grounded third terminal; and
an output terminal connected to the second terminal of the second electric switch to provide a voltage signal according to the specification of the chipsets to the chipsets on the motherboard as a driving voltage signal.

### Claim 2 (depends on 1)

The adaptor circuit as claimed in claim 1, wherein the connection component is a resistor.

### Claim 3 (depends on 1)

The adaptor circuit as claimed in claim 1, wherein the first electric switch and the second electric switch are NPN transistors, the first, second, and third terminals are base, collector, and emitter respectively.

### Claim 4 (depends on 1)

The adaptor circuit as claimed in claim 1, wherein the power pin of the power connector is a 5V power pin.

### Claim 5 (depends on 1)

The adaptor circuit as claimed in claim 1, wherein the first voltage terminal is a 3.3V-SYS terminal of the ATX power supply, and the second voltage terminal is a 5V-SYS terminal of the ATX power supply.

### Claim 6 (depends on 1)

The adaptor circuit as claimed in claim 1, wherein the first terminal of the first electric switch is connected to the power good pin via a second resistor.

### Claim 7 (depends on 1)

The adaptor circuit as claimed in claim 1, wherein the second terminal of the second electric switch is grounded via a capacitor.

### Claim 8 (depends on 1)

The adaptor circuit as claimed in claim 1, further comprising a third electric switch, the power connector further comprising a power supply on pin, the third electric switch having a first terminal connected to the power supply on pin of the power connector, a second terminal connected to the output terminal, and a grounded third terminal.

### Claim 9 (depends on 8)

The adaptor circuit as claimed in claim 8, wherein the third electric switch is an NPN transistor, the first, second, and third terminals are the base, the collector, and the emitter of the NPN transistor respectively.

### Claim 10 (depends on 9)

The adaptor circuit as claimed in claim 9, wherein the first terminal of the third electric switch is connected to the power supply on pin via a third resistor.