Patent ID: 6788248
Filing Date: 2004-09-07
Classification: G01S

Abstract:
An apparatus for processing an input signal, comprising:a processor that processes an input signal of a prescribed channel having one of a normal status or an abnormal status: a detector circuit that detects whether the input signal has a normal status or an abnormal status; and an output generator that generates an output signal based on the input signal, wherein if the detector circuit detects the abnormal status, the output generator uses a previous input signal of the prescribed channel to generate the output signal, wherein the processor comprises: an analog/digital converter that converts an analog global-positioning system signal to a digital signal; and a plurality of data detectors, each of the plurality of data detectors processing the digital signal of a prescribed channel to generate the input signal, and wherein the detector circuit comprises: a status detector that detects the status of the input signal and generates a prescribed status signal if the abnormal status is detected; a status generator connected to the status detector that generates a generated normal status in response to the prescribed status signal; and a counter responsive to the prescribed status signal, the counter generating a counter signal after a prescribed period of time.