[SOLVED] how to measure the input capacitor of opamp?

[PONDERBOY]

recently,i'm wondering how to measure the input capacitor of opamp,please give some advice.

 

[khouly]

measure the input impedance of the opamp
and get the imagenary part ,


khouly

 

[sxg]

for muster parameter device,you can test the impedance in two frequence,
the you can calculate the capacitance

 

[layes2]

just do an .ac and measure the ac current to the input

 

[nafaiz]

h**p://microel_group.unile.it/PDF/MICRO_DISPENSE/Cap_VI.pdf

 

[cliffj]

Try Agilent 4284 or any network analyzer. But it depends the freq.
range you wanna analyze.