Patent ID: 7825841
Filing Date: 2010-11-02
Classification: H03M

Abstract:
1. A method of adjusting an input signal level of an analog-to-digital converter, comprising the steps of: generating a control signal indicative of an input signal level to said analog-to-digital converter, said control signal being generated as a signal indicating whether said analog-to-digital converter is operating close to or above an upper limit of an operating range; and adjusting the input signal level to said analog-to-digital converter in dependence of said control signal, wherein said analog-to-digital converter is a Sigma-Delta converter, and said control signal is generated as a signal indicating whether said Sigma-Delta converter is operating close to or above an upper limit of a stable operating range, the step of generating the control signal further comprising the step of counting consecutive equal samples in an output signal from said Sigma-Delta converter.