SENSING APPARATUS
First Claim
1. A sensing apparatus, comprising:
- an acceleration sensing unit, for measuring an acceleration applied to a proof mass, further comprising;
the proof mass;
a carrier signal source, for providing a carrier signal;
a capacitive half-bridge, comprising a first capacitor and a second capacitor, wherein each of the first capacitor and the second capacitor is coupled to the proof mass and the carrier signal source, one with a positive electrode and the other one with a negative electrode, and the acceleration applied to the proof mass makes the carrier signal flow through the first capacitor and the second capacitor so that the first capacitor and the second capacitor respectively generates a first voltage variation and a second voltage variation which have opposite phases with each other; and
an instrumentation amplifier, for receiving and amplifying the first voltage variation and the second voltage variation, whereby the magnitude and the direction of the acceleration applied to the proof mass is determined
1 Assignment
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Accused Products
Abstract
A sensing apparatus includes an acceleration sensing unit, for measuring an acceleration applied to a proof mass, further including: a proof mass; a carrier signal source, for providing a carrier signal; a capacitive half-bridge, including a first and a second capacitor, wherein each capacitor is coupled to the proof mass and the carrier signal source, one with a positive electrode and the other one with a negative electrode, and the acceleration applied to the proof mass makes the carrier signal flow through the first and the second capacitor so that the first capacitor and the second capacitor respectively generates a first voltage and a second voltage variation which have opposite phases with each other; and an instrumentation amplifier, for receiving and amplifying the first voltage and the second voltage variation, whereby the magnitude and the direction of the acceleration applied to the proof mass is determined.
5 Citations
10 Claims
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1. A sensing apparatus, comprising:
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an acceleration sensing unit, for measuring an acceleration applied to a proof mass, further comprising; the proof mass; a carrier signal source, for providing a carrier signal; a capacitive half-bridge, comprising a first capacitor and a second capacitor, wherein each of the first capacitor and the second capacitor is coupled to the proof mass and the carrier signal source, one with a positive electrode and the other one with a negative electrode, and the acceleration applied to the proof mass makes the carrier signal flow through the first capacitor and the second capacitor so that the first capacitor and the second capacitor respectively generates a first voltage variation and a second voltage variation which have opposite phases with each other; and an instrumentation amplifier, for receiving and amplifying the first voltage variation and the second voltage variation, whereby the magnitude and the direction of the acceleration applied to the proof mass is determined - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification