Back to results
US 6,633,446 B1Granted
Magnetic reproducing apparatus and reproducing circuit to be applied to the apparatus
AssigneeSony Corporation
InventorMichiya Sako
Life of this patent
Estimating the term…
Abstract
A reproducing circuit for a MR head is proposed, wherein a MR head is interposed between a pair of current source circuits and a feedback amplifier is provided for controlling the current of the pair of the current source circuits so that a terminal voltage of the MR head becomes a predetermined value. Reproduced output from the MR head is derived from an amplifier having balanced input terminals for canceling noises and ripple components included in a power source.
Claims38
A magnetic reproducing apparatus comprising:
- a magnetic recording medium;
- a head for reproducing a information signal received from said magnetic recording medium;
- a first current source connected to a first terminal of said head;
- a second current source connected to a second terminal of said head;
- and
- an amplifier having input terminals connected to said first and second terminals of the head wherein
- current of said first current source is controlled by said amplifier, and
- wherein said input terminals of the amplifier includes an inverting input terminal and a non-inverting input terminal, and
- a reference voltage source is connected between said non-inverting input terminal of the amplifier and said first terminal.
6 more elements
A reproducing circuit to be applied to a magnetic reproducing apparatus comprising:
- first and second terminals to be connected to a pair of terminals of a head;
- a first current source connected to said first terminal;
- a second current source connected to said second terminal;
- and
- an amplifier connected to said first and second terminals to input terminals of said amplifier, wherein
- said amplifier controls the current of said first current source, and
- said input terminals of the amplifier include an inverting input terminal and a non-inverting input terminal, and
- a reference voltage source is connected between said non-inverting input terminal of the amplifier and said first terminal of the head.
5 more elements
Dependencies are inferred from the claim text.