What's the function of metal resistor layout PCELL?

[pbs681]

When I check my PDK, I see metal resistor layout PCELL. What is the usage of this PCELL. I don't think it is use to implement resistor since the resistance is very small.

As for sch metal resistor PCELL, I think we use it during pre-layout simulation to simulate the effect of the metal connection.

 

[hung_wai_ming@hotmail.com]

Metal Resistor

metal resistor has two use
One is resistor with a very small resistor in some applications like LDO to create zero.
The other is simulation to predict post layout effect

 

[elbadry]

Re: Metal Resistor

Another useful thing is when you want to connect two pins to the same net. Without metal resistors the LVS tool would complain

 

[pvnk]

Metal Resistor

generally it has got more prescision because of it's comaritive large size.

 

[qutang]

Metal Resistor

is it using at postsim or presim?