公开(公告)号：EP2689348A4

公开(公告)日：2014-09-17

申请号：EP12760719

申请日：2012-03-21

申请人： ESS TECHNOLOGY INC

发明人： MALLINSON A MARTIN ,  YAO HU JING ,  FORMAN DUSTIN

IPC分类号： H03H15/02

CPC分类号： G06F17/5009 ,  H03H15/02 ,  H03K5/15 ,  H03K5/1536

摘要： A method and system for designing and implementing a finite impulse response (FIR) filter to create a plurality of output signals, each output signal having the same frequency but at a different phase shift from the other output(s), is described. Values are determined for the resistors, or other elements having impedance values, in a FIR filter having a plurality of outputs, such that each output has the same frequency response but a different phase than the other output(s). This is accomplished by the inclusion of a phase factor in the time domain calculation of the resistor values that does not change the response in the frequency domain. The phase shift is constant and independent of the frequency of the output signal.