Patent ID: 6297922
Filing Date: 2001-10-02
Classification: G11B

Abstract:
A magnetic recording control circuit for controlling current through a magnetic recording head, the control circuit comprising:first and second electrical power source node regions for connection to an electrical power source;first and second magnetic recording head node regions for connection to the magnetic recording head;at least one input signal node region for receiving input signals;a switch network comprising:a first switch having a conduction path between first and second conduction path regions which are connected in series between the first electrical power source node region and the first magnetic recording head node region, the first switch further having a control region responsive to control signals for controlling conduction through the conduction path;a second switch having a conduction path between first and second conduction path regions which are connected in series between the first electrical power source node region and the second magnetic recording head node region, the second switch further having a control region responsive to control signals for controlling conduction through the conduction path;a third switch having a conduction path between first and second conduction path regions which are connected in series between the first magnetic recording head node region and the second electrical power source node region, the third switch further having a control region responsive to control signals for controlling conduction through the conduction path; anda fourth switch having a conduction path between first and second conduction path regions which are connected in series between the second magnetic recording head node region and the second electrical power source node region, the fourth switch further having a control region responsive to control signals for controlling conduction through the conduction path;a signal coupler having an input region connected to the input signal node region and a plurality of output regions each connected to the control region of a corresponding one of said first, second, third, and fourth switches, wherein the signal coupler provides control signals at at least one output region as a function of the received input signals at the input region; anda current reducer connected to the first magnetic head node region for reducing the current drawn by the signal coupler.