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FREQUENCY CHARACTERISTIC ADJUSTING CIRCUIT, RECEIVING INTERFACE CIRCUIT, AND MAGNETIC STORAGE DEVICE

  • US 20100091623A1
  • Filed: 09/16/2009
  • Published: 04/15/2010
  • Est. Priority Date: 10/10/2008
  • Status: Abandoned Application
First Claim
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1. A frequency characteristic adjusting circuit that adjusts a frequency characteristic of an input signal, the frequency characteristic adjusting circuit comprising:

  • a cutoff range adjusting module configured to be connected to an alternate current coupling circuit capacitively coupled with a signal transmission path and matching terminated, and allow an output signal from the alternate current coupling circuit to pass through such that a low cutoff range in a frequency characteristic of the alternate current coupling circuit varies; and

    a control signal inputting module configured to receive a control signal to control a zero-point frequency based on a numerator polynomial of a transfer function of the cutoff range adjusting module and a pole frequency based on a denominator polynomial of the transfer function, whereinthe numerator polynomial of the transfer function of the cutoff range adjusting module is equalized to a denominator polynomial of a transfer function of the alternate current coupling circuit by the control signal, and a cutoff frequency of the low cutoff range is determined by the pole frequency according to the control signal.

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