Patent ID: 9019018
Filing Date: 2015-04-28
Classification: H03B,H03L

Abstract:
1. An integrated circuit for receiving and processing a radio signal, the integrated circuit comprising: an internal RC-oscillator for providing an internal clock signal having an adjustable oscillator frequency; terminals for connecting an external LC tank having a resonance frequency; a calibration circuit which is configured to adjust the oscillator frequency based on the resonance frequency of the LC tank connected during operation of the integrated circuit; and an internal auxiliary oscillator which is connected to the terminals in a switchable fashion and is configured to generate an auxiliary clock signal based on the resonance frequency, wherein the calibration circuit comprises a frequency comparator which is configured to determine a trimming word for adjusting said oscillator frequency based on a frequency comparison of the internal clock signal and the auxiliary clock signal, wherein the LC tank to be connected is an antenna for receiving said radio signal.