Torque driving circuit
First Claim
1. A torque driver, comprising a rectifying buffer, wherein the buffer comprises:
- an output node for producing a torque signal; and
a differential input having first and second terminals, wherein the first terminal is coupled to receive a control signal and the second terminal is coupled to receive the torque signal, and wherein the torque signal correlatively responds to a voltage difference across the first and second terminals, and wherein the buffer is configured to prevent the torque signal from following the control signal when the control signal drops below a predetermined threshold.
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Accused Products
Abstract
A torque driver that includes a regulator circuit for mitigating zero-g discontinuity effects and deadbanding is presented. An accelerometer may comprise the torque driver and the torque driver may be arranged to receive a control signal from a control circuit that is coupled to deflection sensing circuitry. When the accelerometer undergoes an acceleration the deflection sensing circuitry generates an acceleration signal that is communicated to the control circuit. The control circuit responsively generates a control signal, which the torque driver users to balance a proof mass beam within the accelerometer. The regulator circuit mitigates zero-g discontinuity effects and deadbanding by preventing the torque signal from producing torque signals that simultaneously track the control signal. To do this, the regulator circuit may include a rectifying buffer and/or a modulator.
14 Citations
15 Claims
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1. A torque driver, comprising a rectifying buffer, wherein the buffer comprises:
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an output node for producing a torque signal; and a differential input having first and second terminals, wherein the first terminal is coupled to receive a control signal and the second terminal is coupled to receive the torque signal, and wherein the torque signal correlatively responds to a voltage difference across the first and second terminals, and wherein the buffer is configured to prevent the torque signal from following the control signal when the control signal drops below a predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A torque driver, comprising:
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a left rectifying buffer for outputting a left torque signal, wherein the left rectifying buffer comprises a differential input coupled to receive the left torque signal and a control signal, wherein the left torque signal correlatively responds to a voltage difference between the left torque signal and the control signal; and a right rectifying buffer for outputting a right torque signal, wherein the right rectifying buffer comprises a differential input coupled to receive the right torque signal and the control signal, wherein the right torque signal correlatively responds to a voltage difference between the right torque signal and the control signal. - View Dependent Claims (10, 11)
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12. A torque driver, comprising a regulator circuit for receiving an acceleration signal and responsively adjusting a proof mass beam within an accelerometer by a process comprising:
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outputting a first torque signal that follows a control signal and a second torque signal that does not follow the acceleration signal; and if the control signal moves out of a range, changing the first and second torque signals so that the second torque signal follows the control signal and the first torque signal does not follow the control signal, wherein the regulator circuit is configured to prevent the first and second torque signals from simultaneously following the control signal. - View Dependent Claims (13, 14, 15)
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Specification