HdrChopper
|
Hi Michael.Yu
I agree with trashbox considerations. In addition and concerning your other questions...
1) To a first order using CT or SC modulators do not limit the DR (other secondary effects like CK feedthrough , charge injection, etc; migth limit the SNDR for the SC case). So you could use CT 2) Of course, by increasing the OSR youŽll get better SNR (or equivalently more DR) 3) You might want to consider second order modulators (if your app allows you to) to guarantee the 80dB required target.
As for modulator simulation, I would start by simulating the "behavioral" model for the system, preferably in Matlab. After you got the desired DR then you can create the same model (with ideal components) in Cadence and check for the same performance. Finally you can start incorporating real components into your model and keep checking for DR (obviously simulations will take longer and longer as you incorporate real components)
Hope this helps Tosei
|