Patent ID: 6552865
Filing Date: 2003-04-22
Classification: G11B

Abstract:
A disk drive, comprising:a read/write channel implemented on an integrated circuit; a diagnostic system having bit-weighing conversion and having a diagnostic output responsive to a diagnostic input voltage, where the diagnostic system comprises, a digital to analog converter having an analog output responsive to a diagnostic input signal, an analog comparator coupled to compare the diagnostic input voltage with the analog output, a successive approximation register coupled to receive at least one register value from the analog comparator, the successive approximation register having the diagnostic output responsive to the at least one register value, a first analog multiplexer coupled to receive the analog output from the digital to analog converter, where the first analog multiplexer is coupled to receive at least one test signal from the read/write channel, and a second analog multiplexer coupled to receive the at least one test signal from the first analog multiplexer, where the second analog multiplexer is coupled to receive the diagnostic input voltage, and where the analog comparator is coupled to receive the at least one test signal and the diagnostic input voltage from the second analog multiplexer.