CIRCUIT UNIT HAVING ADJUSTABLE DRIVING STRENGTH CAPABILITY IN CHIP AND METHOD THEREOF

1 . A circuit unit in a chip, comprising:

a main circuit portion; and

a configurable portion, comprising an output stage, a plurality of configurable stages, and a configurable metal layer, wherein the configurable stages are configured to be connected in sequence to the output stage, and the configurable metal layer is connected to the output stage;

wherein the main circuit portion is configured to be adjacent to and connected to the output stage of the configurable portion; and

wherein a driving strength of the circuit unit is determined based on a connection relationship between each of the configurable stages and the configurable metal layer.

2 . The circuit unit according to claim 1 , wherein at least one of the configurable stages is not connected to the output stage through the configurable metal layer.

3 . The circuit unit according to claim 1 , wherein at least one of the configurable stages is connected in parallel to the output stage through the configurable metal layer, to increase the driving strength of the circuit unit.

4 . The circuit unit according to claim 3 , wherein at least one of the configurable stages is not connected to the output stage through the configurable metal layer.

5 . The circuit unit according to claim 1 , wherein components of each of the configurable stages are substantially the same as components of the output stage.

6 . The circuit unit according to claim 5 , wherein the output stage comprises:

a first P-type transistor, having a first control terminal, a first connection terminal, and a second connection terminal; and

a first N-type transistor, having a second control terminal, a third connection terminal, and a fourth connection terminal; and

each of the configurable stages comprises:

a second P-type transistor, having a third control terminal, a fifth connection terminal, and a sixth connection terminal; and

a second N-type transistor, having a fourth control terminal, a seventh connection terminal, and an eighth connection terminal;

wherein the fifth connection terminals and the sixth connection terminals of the second P-type transistor of the configurable stages are respectively connected to each other; and

wherein the seventh connection terminals and the eighth connection terminals of the second N-type transistor of the configurable stages are respectively connected to each other;

wherein the configurable metal layer is connected to the third connection terminal and the second connection terminal of at least one of the configurable stages.

7 . The circuit according to claim 6 , wherein the first connection terminal of the first P-type transistor is connected to a power wire of the chip, the fourth connection terminal of the first N-type transistor is connected to a ground wire of the chip, and the first control terminal of the first P-type transistor is connected to the second control terminal of the first N-type transistor.

8 . The circuit unit according to claim 1 , wherein structure of each of the configurable stages is substantially the same.

9 . The circuit unit according to claim 1 , wherein a layout of the output stage and the plurality of configurable stages is arranged in a symmetry layout manner.

10 . The circuit unit according to claim 1 , wherein a layout of the output stage and the plurality of configurable stages is arranged in a symmetry layout manner with an output wire of the configurable metal layer as a symmetry line.

11 . The circuit unit according to claim 1 , wherein a layout arrangement of the output stage and the plurality of configurable stages adopts a regular arrangement manner.

12 . The circuit unit according to claim 1 , wherein a layout arrangement of the output stage and the plurality of configurable stages causes an output wire of the configurable metal layer to be in a straight shape.

13 . The circuit unit according to claim 1 , wherein driving strengths of the plurality of configurable stages are substantially the same.

14 . The circuit unit according to claim 1 , wherein driving strengths of the plurality of configurable stages are substantially at least partly different, and the driving strengths of the plurality of configurable stages have a fixed proportional relationship.

15 . A method for determining a driving strength of a circuit unit, the method comprising:

providing a main circuit portion of the circuit unit;

providing a configurable portion of the circuit unit,

wherein the configurable portion comprises an output stage, a plurality of configurable stages, and a configurable metal layer, and

wherein the configurable stages are configured to be connected in sequence to the output stage, and the configurable metal layer is connected to the output stage;

wherein the main circuit portion is configured to be adjacent to and connected to the output stage of the configurable portion; and

determining the driving strength of the circuit unit according to a connection relationship between each of the configurable stages and the configurable metal layer.

16 . The method according to claim 15 , wherein a layout of the output stage and the plurality of configurable stages is arranged in a symmetry layout manner.

17 . The method according to claim 15 , wherein a layout arrangement of the output stage and the plurality of configurable stages adopts a regular arrangement manner.

18 . The method according to claim 15 , wherein a layout arrangement of the output stage and the plurality of configurable stages causes an output wire of the configurable metal layer to be in a straight shape.

19 . The method according to claim 15 , wherein the driving strength of each of the configurable stages are substantially the same.

20 . The method according to claim 15 , wherein driving strengths of the plurality of configurable stages are substantially at least partly different, and the driving strengths of the plurality of configurable stages have a fixed proportional relationship.