Electronic device circuit board

Patent metadata

Field	Value
Publication number	US-10663997-B2
Application number	US-201916503568-A
Country	US
Kind code	B2
Filing date	Jul 4, 2019
Priority date	Oct 17, 2018
Publication date	May 26, 2020
Grant date	May 26, 2020

Abstract

Voltage regulation techniques for providing stable power to the components mounted on an electronic device circuit board are presented. In addition to a first component and a second component, a voltage converter and a power line are provided on the electronic device circuit board. The voltage converter converts an external voltage to an internal voltage that is conveyed through the power line. The first component is coupled to the power line to get power via a first power supply point on the power line. The second component is coupled to the power line to get power via a second power supply point on the power line. A first feedback terminal is provided on the power line between the first power supply terminal and the second power supply terminal. The voltage converter regulates the internal voltage based on a voltage value retrieved from the first feedback terminal.

First claim

What is claimed is:

1. An electronic device circuit board, comprising:
a voltage converter and a power line, wherein the voltage converter converts an external voltage to an internal voltage to be conveyed by the power line;
a first component, coupled to the power line to get power from a first power supply point on the power line; and
a second component, coupled to the power line to get power from a second power supply point on the power line,
wherein:
the power line provides a first feedback point that is located between the first power supply point and the second power supply point; and
the voltage converter regulates the internal voltage based on a voltage value retrieved from the first feedback point.

2. The electronic device circuit board as claimed in claim 1 , further comprising:
a first voltage dividing circuit, dividing the voltage value retrieved from the first feedback point and using a first voltage dividing point to output a divided voltage to the voltage converter.

3. The electronic device circuit board as claimed in claim 2 , further comprising:
a second voltage dividing circuit, dividing a voltage value retrieved from an output terminal of the voltage converter and using a second voltage dividing point to output a divided voltage to the voltage converter and thereby the voltage converter further takes the voltage value at the output terminal of the voltage converter into consideration when regulating the internal voltage,
wherein the voltage converter is connected to the power line via the output terminal.

4. The electronic device circuit board as claimed in claim 3 , wherein:
the first voltage dividing point is connected to the second voltage dividing point.

5. The electronic device circuit board as claimed in claim 4 , wherein:
the first voltage dividing circuit includes a first resistor and a second resistor, wherein the first resistor is coupled between the first feedback point and the first voltage dividing point, and the second resistor couples the first voltage dividing point to ground; and
the second voltage dividing circuit includes a third resistor and a fourth resistor, wherein the third resistor is coupled between the output terminal of the voltage converter and the second voltage dividing point, and the fourth resistor couples the second voltage dividing point to ground.

6. The electronic device circuit board as claimed in claim 5 , wherein:
resistance of the first resistor and the second resistor is lower than resistance of the third resistor and the fourth resistor.

7. The electronic device circuit board as claimed in claim 5 , wherein:
a resistance ratio of the first resistor to the second resistor is equal to a resistance ratio of the third resistor to the fourth resistor.

8. The electronic device circuit board as claimed in claim 3 , further comprising:
a third component, coupled to the power line to get power from a third power supply point on the power line; and
wherein:
the power line provides a second feedback point that is located between the second power supply point and the third power supply point; and
the voltage converter further takes a voltage value retrieved from the second feedback point into consideration when regulating the internal voltage.

9. The electronic device circuit board as claimed in claim 8 , wherein:
in comparison with the first feedback point, the second feedback point is further away from the output terminal of the voltage converter.

10. The electronic device circuit board as claimed in claim 9 , further comprising:
a third voltage dividing circuit, dividing a voltage value retrieved from the second feedback point and using a third voltage dividing point to output a divided voltage to the voltage converter.

11. The electronic device circuit board as claimed in claim 10 , wherein:
the third voltage dividing point is connected to the first voltage dividing point, and the first voltage dividing point is connected to the second voltage dividing point.

12. The electronic device circuit board as claimed in claim 11 , wherein:
the first voltage dividing circuit includes a first resistor and a second resistor, wherein the first resistor is coupled between the first feedback point and the first voltage dividing point, and the second resistor couples the first voltage dividing point to ground; and
the second voltage dividing circuit includes a third resistor and a fourth resistor, wherein the third resistor is coupled between the output terminal of the voltage converter and the second voltage dividing point, and the fourth resistor couples the second voltage dividing point to ground; and
the third voltage dividing circuit includes a fifth resistor and a sixth resistor, wherein the fifth resistor is coupled between the second feedback point and the third voltage dividing point, and the sixth resistor couples the third voltage dividing point to ground.

13. The electronic device circuit board as claimed in claim 12 , wherein:
resistance of the fifth resistor and the sixth resistor is lower than the resistance of the first resistor and the second resistor.

14. The electronic device circuit board as claimed in claim 13 , wherein:
the resistance of the first resistor and the second resistor is lower than the resistance of the third resistor and the fourth resistor.

15. The electronic device circuit board as claimed in claim 12 , wherein:
a resistance ratio of the first resistor to the second resistor is equal to the resistance ratio of the third resistor to the fourth resistor, and is further equal to a resistance ratio of the fifth resistor to the sixth resistor.

Assignees

• Shannon Systems Ltd

Inventors

• Zhou Shuhua

Classifications

• G05F1/575 Primary

  characterised by the feedback circuit · CPC title

• H02M3/156

  with automatic control of output voltage or current, e.g. switching regulators · CPC title

• H02M3/06

  using resistors or capacitors, e.g. potential divider · CPC title

• H02M3/00 Primary

  Conversion of DC power input into DC power output · CPC title