Miniscribe Corporation

Amcodyne Incorporated

Nicholas J Bucska

James F Hopper

David E Norton, Jr

A true average peak detector includes an input capacitor having a capacitance C and an output capacitor having a capacitance nC. N voltage samples are successively stored on the input capacitor and are transferred to the output capacitor without discharging the latter. The output voltage from the accumulated charge on the output capacitor is equal to a true average of the voltages of the n samples.

Apparatus and method for detecting a true average of N signal samples

An apparatus is provided for removing invalid read signal peaks which are detected during a disk read operation. In one embodiment, the apparatus converts the analog read-back signal from the disk into a pair of signals, a raw data signal being indicative of the signal peaks read from the disk and a raw polarity signal being indicative of the polarity of such peaks. The raw data signal is inputted to a phase lock loop, which outputs a strobe signal. The raw data signal and the raw polarity signal are made synchronous with the strobe signal in a reclocking circuit. The data and polarity signals outputted by the reclocking circuit are synchronously applied to a qualifying circuit, the output therefrom being free of invalid data.

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Louisville, CO, United States of America

Nicholas J Bucska