Algorithmic analogue to digital converter for high speed operation

摘要

The output of a converter stage comprises a digital output and a first analogue residual voltage output. In an overshoot stage, comprising an amplifier (32) and two capacitors (C1,C2), the amplifier produces a second analogue residual voltage output which is indicative of the first analogue residual voltage output. The overshoot stage can be switched between a sampling phase and an amplifying stage. In the scanning phase, the first capacitor is connected to receive the first analogue residual voltage when the voltage is in a first state, and the second capacitor is connected when the voltage is in a second state. Independent claims are included for an analogue to digital (A/D) converter stage, and a method of reducing the overshoot in an algorithmic A/D converter.