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This is because of your linear output range is not symmetric.
When you are putting in large signal, you are basically saturating the PMOS and NMOS at the output stage.
When you positive signal saturates the PMOS, your NMOS must be saturated in the same way to be symmetric. Since the PMOS and...
There will be poles in all systems. You always need to consider about stability when you have a feedback loop. Without the LPF, you will have parasitics that dominates your frequency responses. Since the parasitics are not controlled, your frequency response of the PLL will be hard to...
First of all, signal strengths are all relative.
Small signal analysis is the measurement/calculation of the tangent of the transfer function. But large signal is actually moving along the transfer function.
When a circuit is perfectly linear, all signal is small since the tangent is constant...
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