Sigma-delta modulator and method for operating a sigma-delta modulator

A method for operating a sigma-delta modulator, the sigma-delta modulator including:

• an integrator, which includes an instrumentation amplifier which is configured to receive an input signal to be modulated at a first input and to receive a feedback signal at a second input, wherein the integrator is configured to generate an integrator signal using the input signal and the feedback signal,
• a quantizer configured to generate a quantizer signal in accordance with the integrator signal,
• a first finite impulse response (FIR) digital-to-analog converter, which is configured to generate the feedback signal in accordance with the quantizer signal;
• a first compensation device, which is configured to compensate for an excess loop delay in accordance with the quantizer signal, and a second compensation device, which includes a second FIR digital-to-analog converter, which is configured to compensate for a clock cycle shift of the feedback signal in accordance with the quantizer signal;
• the method comprising the following steps:
• applying the input signal to be modulated to the first input of the instrumentation amplifier,
• wherein the instrumentation amplifier is configured to provide a high input impedance and a high linear input range for the input signal.