Simple pulse position modulation channel/decoder

U.S. Patent Number: 5737140

Abstract: In a magnetic recording reproducing apparatus, a detecting and decoding circuit comprising: a first integrator having an input for receiving a pulse position modulated (PPM) encoded signal reproduced from magnetic media, and having an output; a second integrator having an input coupled to said output of said first integrator and having an output; a first comparator having a noninverting input connected to the output of said first comparator, an inverting input connected to ground, and an output; a reset pulse circuit having an input connected to the output of said first comparator and an output connected to a reset terminal of said second integrator; a second comparator having a noninverting input connected to the output of said second integrator, an inverting input connected to ground, and an output; and a D flip-flop, having a data input connected to the output of said second comparator, a clock input connected to the output of said reset pulse circuit, and an output which outputs a decoded data signal of said received PPM encoded signal.

Inventors: Carr; Thomas Daniel (Leucadia, CA)

Assignee: Eastman Kodak Company (Rochester, NY)

Application Number: 08/660,385

Issued: 1998-04-07

Expired: 2006-04-07

Classes: 360/29 ; 327/37; 360/46; 375/239

Field of search: 360/46,39,29 375/239 327/13,37,38,58 396/319

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