Patent ID: 6466388
Filing Date: 2002-10-15
Classification: G11B

Abstract:
An overshoot control circuit for a write coil driver, comprising:an H-bridge drive circuit having a first and second transistor coupled together at a first node, and a third and fourth transistor coupled together at a second node; a coil; a first resistor coupled between said first node and one, end of said coil, and a second resistor coupled between said second node and the other end of said coil; and a drive circuit drivingly coupled to said to said first, second, third and fourth transistors and variably driving of said first transistor with respect to said second transistor, and variably driving said third transistor with respect to said fourth transistor, wherein said drive circuit provides a current pulse to said first transistor, wherein said current pulse is generated by delaying a predetermined time period a control signal, inverting said delayed control signal, and coupling said control signal and said inverted delayed control signal to a logic AND gate.