Patent ID: 8437725
Filing Date: 2013-05-07
Classification: H04B

Abstract:
1. A method of controlling switching of a data rate at a digital interface exchanging data between a Radio Frequency (RF) receiver circuit and a digital circuit, wherein the RF circuit processes signals that occupy a first known frequency band, the method comprising the steps of: setting by default the data rate to the low speed rate such that noise produced by said digital interface when using said low speed rate has a power spectral density comprising a first lobe that has a peak located at a frequency that is lower than a lowest frequency in the first known frequency band of the signals processed in said RF receiver circuit; storing the data into a first-in-first-out buffer (FIFO) and monitoring how much capacity of said FIFO is being used; and whenever the capacity usage level of said FIFO reaches a first predetermined threshold value, then controlling said digital interface to switch to a high speed rate in order to reduce the capacity usage level of said FIFO.