silicide resistor

I am using TSMC PDK...It has different type of resistors available....i have a few questions regarding them...

1. Above 30 GHz, which resistors are more accurate against process and temperature variations..? with silicide or without silicide?

2. There are two versions of the resistor without silicide "rppolywo" and "rppolywo_rf"...i cant find any information regarding the difference between the above two in the pdk documentation...Has anyone used these before? Let me know which one to use for high frequency circuits..? Ofcourse, i would be tempted to use the RF one but i want to be sure if there is a tradeoff for using that...

Kind Regards

the rppolywo_rf is used in RF , think the model is more accurate , i think the inductance of the resistor is accounted

khouly

Thanks for your reply...

Also i noticed that smaller resistance values ≤50 ohms are difficult to achieve with un-silicided version....due to limits of Width & Length of the resistor....so i need to use the silicided version....i hope it isnt a problem....

Any experiences or suggestions ?

Regards

try to open the model file , as a text and see the diffeence between the model of RF and non RF resistor

it will give u some insight into the model

khouly

Yes, ur right....i had a look at the model parameters of the two types...the RF model includes the inductance and capacitance of the resistor...whereas the other one does not...!

Kind Regards

i think they also should indicate the frequency range of the model , some companies say this range

did u find something like this ?

khouly

Yes, they provide measurement results of components uptil 30 GHz...beyond that is still a mystery..!

good 30 GHz is a very good range , or u want to work in range more than 30 GHz

khouly