Patent ID: 6747858
Filing Date: 2004-06-08
Classification: H03H

Abstract:
A digital sample rate converter for converting a digital input signal having a first sample rate to a corresponding digital output signal having a second sample rate, comprising:(a) an upsampling circuit for upsampling the digital input signal to produce a first digital signal having a third sample rate which is a first predetermined factor times the first sample rate; (b) a feedback algorithm circuit receiving a second digital signal which is representative of the first digital signal and has the third sample rate for filtering and rate conversion of the second digital signal in order to produce a third digital signal having a fourth sample rate which is a second predetermined factor times the second sample rate; (c) a decimation filter for producing a fourth digital signal in response to the third digital signal; and (d) a downsampling circuit coupled to the decimation filter for downsampling the fourth digital signal by a predetermined factor to produce the digital output signal having the second sample rate.