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System and method for controlling a computer drive motor

  • US 5,905,347 A
  • Filed: 07/16/1993
  • Issued: 05/18/1999
  • Est. Priority Date: 07/16/1993
  • Status: Expired due to Term
First Claim
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1. A computer system comprising:

  • a media device, which media device may be driven;

    a drive motor connected to said media device, which drive motor operates to rotationally drive said media device and which drive motor has an input terminal capable of receiving power to enable said drive motor to operate;

    a battery having an output terminal on which a first electric potential is provided;

    a motor speed control circuit connected electrically between said drive motor and said battery, said motor speed control circuit capable of applying said first electric potential provided on said first output terminal of said battery to said input terminal of said drive motor, wherein said motor speed control circuit includes means for ensuring that said first electric potential provided on said output terminal of said battery does not exceed a maximum electric potential that can be accepted by said drive motor before applying said first electric potential to said input terminal of said drive motor;

    a DC to DC converter electrically connected to said battery, and having an output terminal at which a second electric potential is provided wherein said second electric potential is lower than said first electric potential; and

    a drive electronics circuit coupled to said output terminal of said DC to DC converter for reading data stored on said media device;

    whereby said drive electronics circuit receives power provided through said output terminal of said DC to DC converter and whereby said drive motor is powered independent of said DC to DC converter.

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