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I am designing a 3-order single loop CT Sigma Delta Modultor with RZ DAC.But how can I get the NTF? I can get the NTF of the SDM with NRZ DAC. Mainly, the transfer function of z-domain to s-domain can not be transered using matlab command d2c or d2cm.Who can tell me the method? Thanks anyway.
We will design a RF chip applying in the Tower Semiconductor 0.18um technology,so who used the technology and can tell me how about the technology?thanks anyway.
Rgds
longstar
yes, it's a good ideal.And I add the ground shield in layout. I use the metal 5 and metal 6 as the ground shield because of the MIM capacitor between metal 5 and metal 6.But it does not work.So any ideal else?
Thanks anyway.
Rgds.
longstar
mim capacitor with shield
I am doing the design of a SR ADC. The charge redistribution architecture is applied in the SR ADC.And the pre-simulation to the ADC is match with the spec.But the post simulation to layout of the capacitor array is terrible because of the coupled capacitor. The...
Who has used SMIC 0.18um Mixed Signal process? And now, I use a high poly resistor(hrppro). The layout of this type resistor can not be extracted, and the LVS cannot be made.Because the nets about the two terminals of the resistor is short circuit.That is ,the risitor volume is zero. But it is...
thank you, fixrouter4400
I only want to get a simple and quick method to slot.It's too slow if you use the quick key(shift + c)to slot on a 100um width metal.
We will design a transceiver in WLAN 802.11a+g.So we should simulate the system architecture in Matlab or ADS at first to evaluate the parameters of the all blocks(LNA,MIXER,LPF,etc),such as gain,p-1db,IIP3,NF,etc.If we get the parameters,we can design circuits of the blocks in CADENCE.But I am...
In the layout of the capacity which floats on the ground,there are some parastive caps,but I don't know how to reduce the cap.Could you give me some ideas?Thanks.
Rgds.
longstar
If I am going to design a active filter,then how to select the OPA?The opa must have high gain and high GBW,but I don't know the requirement of -3db frequency about the opa.Could you give me some idea?thanks.
Rgds.
longstar
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