Capacitance-to-digital converter and method for providing a digital output signal

摘要

A capacitance-to-digital converter (10) comprises a capacitor arrangement (30), a converter (1) that is coupled on its input side to the capacitor arrangement (30) and a calibration unit (13) that is coupled on its input side to the converter (1). The capacitor arrangement (30) comprises an input capacitor (16).

主权项

1. A capacitance-to-digital converter, comprising:
a capacitor arrangement comprising an input capacitor; a converter that is coupled on its input side to the capacitor arrangement; and a calibration unit that is coupled on its input side to the converter, wherein the converter comprises an interface circuit that is coupled on its input side to the capacitor arrangement and comprises a first integrator having a first amplifier as well as a first and a second integrating capacitor, wherein the interface circuit comprises a first and a second chopping unit, such that the first chopping unit couples a first and a second input of the first amplifier to a first terminal of the first integrating capacitor, and the second chopping unit couples the first and the second input of the first amplifier to a first terminal of the second integrating capacitor.