G - Physics – 11 – B
Patent
G - Physics
11
B
352/20.7
G11B 5/02 (2006.01) G11B 5/03 (2006.01)
Patent
CA 1048640
ABSTRACT A bias supply circuit comprising a magnetic head, a bias oscillator connected to the head, a recording amplifier connected to the head, a voltage source to operate the bias supply circuit, a switch means coupled between the voltage source and the bias oscillator, the switch means being controlled in accordance with material of a magnetic tape which contacts to the head to record the output signals of the recording amplifier.
201884
Na
Sony Corporation
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