H-bridge power amplifier for optical recording head actuator

摘要

A recording head unit is described that can use a pulsed drive signal. The head unit can include a recording head to interact with a storage media, an actuator connected to the recording head and configured to move the recording head relative to the storage media, and control circuitry to send a control signal to the actuator, wherein the control circuitry includes a pulse driven switching circuitry to control current flow to the actuator. An H-bridge can be used to drive the actuator and move the read head.

主权项

1. A recording head unit comprising:
a recording head to interact with a storage media; an actuator connected to the recording head and configured to move the recording head relative to the storage media; and control circuitry to send a control signal to the actuator, wherein the control circuitry includes a pulse driven H-bridge amplifier to control current flow to the actuator, wherein the control circuitry includes a sense resistor that provides first sense signal to an amplifier, the amplifier outputs a second sense signal to a summing circuit that sums the second sense signal and an input from a controller and outputs a signal to a forward compensation module outputs a signal to a pulse control module.