correlated double sampling integrator

[crazyfox]

hii

i know some correlated double circuit that can cancel offset and have

an advantage that it's opamp finite gain at dc input will be equal square

can anyone teach me how to simulate it's equal square of finite gain?

thanks

 

[safwatonline]

try to calculate the settling error using large settling period

 

[crazyfox]

thanks for your suggestion

you say "try to calculate the settling error using large settling period "

but i still can not understand how to define "settling error"

can you teach me more detailed

thanks

 

[safwatonline]

settling error is gain error plus dynamic error , so to c the gain error alone make sure that the settling period is large enough to assure that the OTA is dynamically settled, then monitor the output.
try to use a differential dc signal as the input to estimate the perfect settling condition and the deviation from this value is due to the gain error, gain error is proportional to Vout and inversely prop. to the loop gain