| 摘要 |
Disclosed is a current-feedback measurement amplifier. A ripple element of an output signal due to an offset voltage of the amplifier is sampled through a switching operation in a ripple removing unit. A voltage formed by an integral operation and a transconductance operation of the sampled signal is converted into a compensation current. The compensation current is inputted to the amplifier and the influence of the offset voltage is attenuated. Therefore, the usage of a large capacitor to sense an output voltage is avoided, and a common mode gain is rapidly reduced. |
