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Differential charge amplifier with built-in testing for rotation rate sensor

  • US 6,714,070 B1
  • Filed: 02/07/2002
  • Issued: 03/30/2004
  • Est. Priority Date: 02/07/2002
  • Status: Expired due to Fees
First Claim
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1. A differential charge amplifier for a rotation rate sensor having a piezoelectric structure with first and second pick-ups that provide charge signals corresponding to rotation of the structure, comprising:

  • a pair of input channels to which the charge signals are applied in a balanced differential manner, means for applying a test signal to the two input channels in an unbalanced manner so that the two channels produce different outputs in response to the test signal, and an output stage responsive to the difference between the outputs of the two input channels.

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