lily1981216 said:
nandu said:
i was simulating the noise performance of a mos diffamp, and i found that the tail mos current source contributes significantly to the 1/f noise measured at the differential output. why is this happening? i always thought the tail mos doesnt contribute to overall noise as its noise current gets evenly distributed between the 2 branches and hence gets canclled off when we view the differential output.
may i ask you how can you use cadence to run analysis about 1/f noise
First, check that you have the AF /KF parameters or equivalent.
Many old or simple models don't, and 1/f default parameters are 0.