newhand
Member level 1
Hi guys,
I'm new to pipeline ADC.
Now I'm confused about the residue amplifier.
Based on the system function block,the Vout vs Vin for every stage,
should be:Vout=2^B*(Vin-VDAC),
(B is the number of bit of every stage,VDAC is the voltage from B+1 bit DAC).
But in the realization of the residue amplifier using SC circuit,
we often get:
Vout=Vin+Cs/Cf*(Vin-Vout),
(Cs is the sampling cap,Cf is the feedback cap).
Is there something wrong with the circuit,why there is still a term "Vin"?Shouldn't it be removed?
I'm new to pipeline ADC.
Now I'm confused about the residue amplifier.
Based on the system function block,the Vout vs Vin for every stage,
should be:Vout=2^B*(Vin-VDAC),
(B is the number of bit of every stage,VDAC is the voltage from B+1 bit DAC).
But in the realization of the residue amplifier using SC circuit,
we often get:
Vout=Vin+Cs/Cf*(Vin-Vout),
(Cs is the sampling cap,Cf is the feedback cap).
Is there something wrong with the circuit,why there is still a term "Vin"?Shouldn't it be removed?
