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US 9,435,824 B2Granted
Circuit to extend frequency response of accelerometer
OwnerGarimella R Sarmainventor
Life of this patent
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Abstract
A compensation circuit connected to an accelerometer's output extends the frequency response of the accelerometer, while reducing noise produced by the accelerometer. The compensation circuit has a gain as a function of frequency that is (i) constant up to a first frequency that is less than the accelerometer's natural resonance frequency, and (ii) reduced to approximately zero at a second frequency that is greater than the accelerometer's natural resonance frequency.
Claims2
A system for extending the frequency response of an accelerometer while reducing noise produced by the accelerometer, comprising a compensation circuit including
- a first T-network in parallel with a first capacitor, said first T-network defined by two common-value resistors and a capacitor connected therebetween and to ground,
- an operational amplifier having a non-inverting input coupled to ground, an inverting input, and an output, and
- a second T-network in parallel with a parallel resistance-capacitance (RC) circuit, wherein said second T-network is identical to said first T-network, and wherein said parallel RC circuit is defined by a second capacitor in parallel with a first resistor,
- wherein said first T-network is connected between the accelerometer's output and said inverting input of said operational amplifier, and
- wherein said second T-network in parallel with said parallel RC circuit is connected to said inverting input of said operational amplifier and said output of said operational amplifier.
2 more elements
Dependencies are inferred from the claim text.