Scalable current mirror?

[Octago]

Hi,

I want to design a scalable current mirror, is there any way to externally control the scale of a current mirror by injecting a current signal or some other methods?

thanks

 

[FvM]

Basically, introducing an offset voltage in a non-degenerated bipolar current mirror creates a scale factor and may operate as a simple kind of multiplier. You should evaluate possible circuits by yourself to see the limitations.

 

[Octago]

thanks, but for CMOS current mirror, is there any similar design?

 

[ashish_chauhan]

possibly you can increase the number of output multiplier using switches...

 

[Octago]

thanks

If possible, could you please give me any detailed information or reference on this implementation?

possibly you can increase the number of output multiplier using switches...

 

[ashish_chauhan]

this can be the simplest implementation see the attaced file.

 

[supreet_95]

U can see any book on DAC, they usually use similar topologies. Just change the logic and use it as per convinience to get a scaled current according to the input control voltage