SYSTEM AND METHOD FOR REDUCING OFFSET VARIATION IN MULTIFUNCTION SENSOR DEVICES
First Claim
1. A multifunction sensing device, the multifunction sensing device comprising:
- a microelectromechanical (MEMS) gyroscope, the MEMS gyroscope configured to generate a first clock signal;
a reset mechanism, the reset mechanism configured to generate a reset signal in response to an edge of the first clock signal; and
a second sensor, the second sensor including at least a second clock signal, the second sensor configured to receive the reset signal and to set relative periodic phase alignment between the second clock signal and the first clock signal in response to the reset signal.
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Abstract
Systems and methods are provided for improved multifunction sensing. In these embodiments a multifunction sensing device (100) includes a microelectromechanical (MEMS) gyroscope (110) and at least a second sensor (112). The MEMS gyroscope (110) is configured to generate a first clock signal, and the second sensor includes a second clock signal. The multifunction sensing device further includes a reset mechanism (114), the reset mechanism (114) configured to generate a reset signal to set the relative periodic phase alignment of the second clock signal to the first clock signal. Consistently setting the relative periodic phase alignment of the clocks for the other sensor devices (112) to the clock of the MEMS gyroscope (110) can improve the performance of the devices by reducing the probability that varying output offsets will occur in the multiple sensing devices.
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Citations
20 Claims
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1. A multifunction sensing device, the multifunction sensing device comprising:
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a microelectromechanical (MEMS) gyroscope, the MEMS gyroscope configured to generate a first clock signal; a reset mechanism, the reset mechanism configured to generate a reset signal in response to an edge of the first clock signal; and a second sensor, the second sensor including at least a second clock signal, the second sensor configured to receive the reset signal and to set relative periodic phase alignment between the second clock signal and the first clock signal in response to the reset signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A sensing device, comprising:
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a microelectromechanical (MEMS) gyroscope, the MEMS gyroscope configured to generate a first clock signal phase-locked to mechanical oscillation in the MEMS gyroscope or to a sub-harmonic of the mechanical oscillation; a reset mechanism, the reset mechanism configured to receive the first clock signal and a reset request signal, and wherein the reset mechanism is configured to generate a reset signal in response to receiving the reset request signal and an edge of the first clock signal subsequent to receiving the reset request signal; a second MEMS sensor, the second MEMS sensor including a second clock signal, and where the second MEMs sensor is selected from the group consisting of;
a MEMS inertial sensor and a MEMS pressure sensor, and wherein the second MEMS sensor is configured to receive the reset signal and to set relative periodic phase alignment between the second clock signal and the first clock signal in response to the reset signal; anda third MEMS sensor, the third MEMS sensor including a third clock signal, and where the third MEMS sensor is selected from the group consisting of;
a MEMS inertial sensor and a MEMS pressure sensor, and wherein the third MEMS sensor is configured to receive the reset signal and to set relative periodic phase alignment between the third clock signal and the first clock signal in response to the reset signal. - View Dependent Claims (11)
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12. A method of operating a multifunction sensing device, the multifunction sensing device including a microelectromechanical (MEMS) gyroscope and a second sensor, the method comprising:
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generating a first clock signal in the MEMS gyroscope; and setting relative periodic phase alignment between a second clock signal in the second MEMS sensor to the first clock signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification