Patent ID: 6201653
Filing Date: 2001-03-13
Classification: G11B

Abstract:
A magnetic-head write-driver circuit, comprising:a write-driver circuit receiving an input signal and outputting a first write signal related to the input signal, the first write signal having transitions, the write-driver circuit having a signal path between an input and an output of the write-driver circuit; anda by-pass driver circuit coupled in parallel to the signal path of the write-driver circuit, the by-pass driver circuit outputting an assist signal that is superimposed on the first write signal and adds a voltage to the first write signal to form an output write signal, the assist signal being related to transitions of the first write signal, the by-pass driver circuit including a switch circuit connected to a first voltage and a second voltage, the assist signal being formed by the switch circuit simultaneously connecting the first voltage and the second voltage to the output of the write-driver circuit.