| 摘要 |
The invention relates to a sigma-delta A/D converter, comprising at least one analog signal input (1, 2) for applying an analog input signal, a subtraction mechanism (3) that has multiple capacitors (20) which are used for sampling the input signal during a sampling phase and which can be switched to reference voltage sources (7, 8, 9) during an integration phase according to control signals; an integrator (10) for integrating the output signal of the subtraction mechanism (3) during the integration phase, a quantifier (13) for analog/digital conversion of the output signal of the integrator (10) for emitting a digitised output signal to a digital signal output (14); and a control logic (16) for forming the control signals in such a way as to minimise the current load of the reference voltage sources (7, 8, 9) during the integration phase.
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