Can anyone help to solve the Dc coupling in IC design?

[piao]

The DC coupling problem depends on 2 factors: one is the voltage variation of the node, the other is the capacitance on the coupling node. Is there any suggestions to solve the DC coupling in IC design?

Thanks in advance.

 

[srivatsan]

if you take a look at the specification sheets of the chip, they would have discussed about decoupling capacitors. usually it is placed very close to the node. it is about 2nF or little bit more. one end of the capacitor goes to the node and it may be VCC or GND and the other end is GND or VCC.

 

[mhamed]

I think an IC designer should try to not use Capacitor in IC...for that isn't it good using current sources?

 

[piao]

I want to solve the DC coupling in IC inner circuit, not outside the circuit, so the capacitance should be reasonable, that's difficult, any other solutions?

mhamed, if we do not use capacitor, any other suggestions?

Anyway, thanks.