An improved pulse-slimming method for magnetic recording

This paper briefly summarizes various pulse-slimming methods for enhancing magnetic recording signals. It then describes the compensation methods used in a recently announced mass storage system. The advantages of the new methods of compensation are compared with previous methods. A key feature of the new design is a basic pulse-slimming block that enables the leading and trailing edges of an isolated read pulse to be slimmed independently. This, combined with an integrator to convert peaks to zero crossings, equalizes the phase and amplitude of the recording channel.