Patent ID: 6724337
Filing Date: 2004-04-20
Classification: H03M

Abstract:
A method for analog/digital converting of at least one analog low-frequency signal with an analog/digital converter which can capture only an analog signal with a frequency above a predetermined border frequency value, whereinat least one analog low-frequency signal, which has at least one frequency component below the predetermined border frequency value is provided, said at least one frequency component being such that the analog low-frequency signal, when converted by said analog/digital converter without said frequency component, cannot be reconstructed from a corresponding output signal of the analog/digital converter, at least one analog high-frequency signal, which has a frequency above the predetermined border frequency value, is provided, an analog intermediate signal is generated using the analog low-frequency signal and the analog high-frequency signal, the analog intermediate signal having a characteristic analog feature which makes it possible to determine the analog low-frequency signal from the analog intermediate signal, the analog intermediate signal is input into the analog/digital converter, the analog intermediate signal is converted into a digital signal thereby generating a digital intermediate signal, the digital intermediate signal having a characteristic digital feature which makes it possible to determine a digital low-frequency signal from the digital intermediate signal, and the digital low-frequency signal is determined from the digital intermediate signal using the characteristic digital feature.