Patent ID: 9024797
Filing Date: 2015-05-05
Classification: G01R,H03M

Abstract:
1. An integrating analog-to-digital (A/D) converter, comprising: a measuring voltage input for an analog measuring voltage, which is connected via a measuring resistor to an inverting input of an integrator, a first reference voltage input for a first reference voltage and a second reference voltage input for a second reference voltage, a first reference voltage switch configured to alternatively connect the first and the second reference voltage inputs via a first reference resistor to the inverting input of the integrator, a comparator connected downstream of the integrator and configured to compare a test voltage applied to a test voltage input of the comparator with a comparator reference voltage applied to a reference voltage input of the comparator, wherein the comparator test voltage input is connected to an output of the integrator, a control device configured to actuate the first reference voltage switch in a clocked manner and to measure time intervals between individual switching processes, and an inverter configured to invert the measuring voltage and a first heating resistor thermally coupled to the measuring resistor, wherein the inverter and the heating resistor are connected in series between the measuring voltage input and the output of the first reference voltage switch.