RECORDING DEVICE WITH TEMPERATURE-DEPENDENT WRITE-CURRENT CONTROL

摘要

The device for recording an information signal on a magnetic record carrier (2) comprises a write amplifier (3), a magnetic head (4) of the magnetoresistive type, and compensation means for controlling the amplitude of the write current in dependence upon temperature variations which occur during recording. The compensation means comprise actuator means for bringing the record carrier into contact with the magnetic head (4) before a recording is started. In addition, detection means (17, 18) have been provided to detect an output signal of the magnetic head produced as a result of the magnetic head being brought into contact with the record carrier. Control signal generator means (17) generate a control signal whose magnitude is a measure of the magnitude of the output signal. The compensation means (3, 5, 8, 11, 17) are adapted to control the amplitude of the write current in dependence upon the control signal.