CONVERTER WITH AN ADDITIONAL DC OFFSET AND METHOD THEREOF

摘要

A converter with an additional DC offset and method thereof is disclosed in the present invention. The converter includes a switch circuit, a first capacitor, a plurality of additional capacitor cells and an operational amplifier. The switch circuit includes a plurality of switches. The first capacitor stores a first charge according to the switching control of the switch circuit. The plurality of additional capacitor cells includes a first additional capacitor cell and a second additional capacitor cell. There is a capacitor difference between the first additional capacitor cell and the second additional capacitor cell. The first additional capacitor cell and the second additional capacitor cell store a second charge and a third charge having different polarity and magnitude with the second charge according to the switching control of the switch circuit. The operation amplifier generates a DC bias according to the first charge wherein the DC bias includes a DC offset. The operation amplifier further generates an inverted DC offset according to a difference between the second charge and the third charge to compensate the DC offset.

主权项

1. A converter, comprising:
a switch circuit, comprising a plurality of switches; a first capacitor, storing a first charge according to switching control of the switch circuit and comprising a first additional capacitor cell and a second additional capacitor cell wherein there is a capacitor difference between the first additional capacitor cell and the second additional capacitor cell; and the first additional capacitor cell and the second additional capacitor cell store a second charge and a third charge having different polarity and magnitude with the second charge, respectively, according to switching control of the switch circuit; and an operational amplifier, generating a DC bias including a DC offset according to the first charge and further generating an inverted DC offset according to a difference between the second charge and the third charge to compensate the DC offset.