Patent ID: 7002997
Filing Date: 2006-02-21
Classification: H03H

Abstract:
1. An interpolation filter structure, comprising: a first gain multiplexer for receiving a control signal, a previous discrete-time signal and a current discrete-time signal and selecting either the previous discrete-time signal or the current discrete-time signal according to the control signal to multiply by a first gain value and produce a first gain signal; a second gain multiplexer for receiving the control signal, the previous discrete-time signal and the current discrete-time signal and selecting either the previous discrete-time signal or the current discrete-time signal according to the control signal to multiply by a second gain value and produce a second gain signal; an adder for adding together the first gain signal and the second gain signal to produce an add signal; and a multiplexer for receiving the control signal, the previous discrete-time signal and the add signal and selecting either the previous discrete-time signal or the add signal to serve as a discrete-time interpolation signal.