| ??? 03/27/06 03:04 Modified: 03/27/06 03:13 Read: times |
#113168 - Chopper Responding to: ???'s previous message |
Suresh said:
Can i get your suggestions on this issue thereby finding suitable ways to overcome it? The best way to eliminate the influence of offset voltages, voltage drops of input bias currents of OPamps and thermo potentials of contacts is to use a chopper. A chopper modulates the current through the contact in a suited way and takes only those components of signal voltage into calculation which result from this modulation. All other static DC components like offset voltage, voltage drops of input bias currents or thermo potentials will vanish by this methode. Kai |
