How to implement a variable resistance in CMOS process

[tia_design]

Hi,

How to implement a variable resistance in CMOS process, like the value is controlled by voltage. Thanks a lot.

 

[truebs]

I am not sure about Voltage variable , but we can implement the temperature variable resistance using temperature gradient parameter.

 

[joe_chen]

VCR is a very good method

 

[Fom]

Both pins floating or one of them grounded?

 

[Depp]

Both pins floating or one of them grounded?

how about the "Both pins floating" one???

 

[castrader]

why not use MOS transistor as a R?