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Right half Plane Zero in Circuit?

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bryanwizard

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Right half Plane Zero...

Does it possible to compensate this!!!

How this thing occur in the circuit..?

It is an advantage or disadvantage?


tnx///
 

Right half Plane Zero...

1) RHZero is appear when miller compensation technique is used. For example, we have 2 stage amp with 2th inverting CS stage with miller capacitor, capacitor provide direct path for high frequencies which have opposite phase relative to SC output. That affect on phase margin and can be a badnwidth limiting factor especially for MOS circuit with lower transconductance than bipolar ones (for bipolar RHZ is more high frequency).
Position of zero is Gm/Cm.
2) Use zero nulling compensation, multipath miller zero canceletaion and other techniques.
 

Right half Plane Zero...

you can push it towards Left half Plane.and it will decrease degradation of phase magin
 

Re: Right half Plane Zero...

I tink miller compensation would not be possible!!!
 

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