Analog-digital converter and method for analog-digital converting

A method for converting an analog input signal to a digital output signal, comprising the steps of:

• providing a first sampling value of an analog input signal, and loading a first fixed value into a second register;
• calculating a first value of a first register so that a sum of the first values of the first and second registers depends on the analog input signal;
• forming a first sum of the first values of the first and second registers, and outputting the first sum as a first digital output signal;
• fixedly storing the first value of the first register in the first register;
• providing a second sampling value of the analog input signal;
• calculating a second value of the second register so that the sum of the first value of the second register and the second value of the second register depends on the analog input signal;
• and
• forming a second sum of the first value of the first register and the second value of the second register depending on the analog input signal.

A computer program with a program code stored on a computer readable medium for carrying out the method of converting an analog input signal to a digital output signal, executable on a computer, the computer program comprising instructions for providing a first sampling value of an analog input signal, and for loading a first fixed value into a second register;

• for calculating a first value of a first register so that a sum of the first values of the first and second registers depends on the analog input signal;
• for forming a first sum of the first values of the first and second registers and for outputting the first sum as a first digital output signal;
• for fixedly storing the first value of the first register in the first register;
• for providing a second sampling value of the analog input signal;
• for calculating a second value of the second register so that the sum of the first value of the second register and the second value of the second register depends on the analog input signal;
• and for forming a second sum of the first value of the first register and the second value of the second register depending on the analog input signal.