Increasing the dynamic range of a MEMS gyroscope
First Claim
Patent Images
1. A system for increasing a dynamic range of a MEMS gyroscope, comprising in combination:
- a MEMS gyroscope including at least one sense plate;
sense electronics connected to the at least one sense plate, wherein the sense electronics provide an angular rate output; and
a variable sense bias operable to apply a sense bias voltage to the at least one sense plate.
1 Assignment
0 Petitions
Accused Products
Abstract
A MEMS gyroscope system and method for increasing a dynamic range of the MEMS gyroscope is provided. By adjusting a scale factor of the MEMS gyroscope, the highest sensed rate will be increased, which increases the dynamic range. The scale factor may be adjusted by using a variable sense bias and/or an automatic gain control loop in sense electronics.
19 Citations
33 Claims
-
1. A system for increasing a dynamic range of a MEMS gyroscope, comprising in combination:
-
a MEMS gyroscope including at least one sense plate;
sense electronics connected to the at least one sense plate, wherein the sense electronics provide an angular rate output; and
a variable sense bias operable to apply a sense bias voltage to the at least one sense plate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A system for increasing a dynamic range of a MEMS gyroscope, comprising in combination:
-
a tuning fork gyroscope including at least one sense plate;
sense electronics connected to the at least one sense plate, wherein the sense electronics is operable to convert a current to a DC voltage, and wherein the DC voltage is proportional to an angular rate input detected by the tuning fork gyroscope; and
a variable sense bias operable to apply a sense bias voltage to the at least one sense plate, wherein the sense bias voltage is adjusted based on the angular rate input detected by the tuning fork gyroscope.
-
- 9. A method for increasing a dynamic range of a MEMS gyroscope, comprising connecting a variable sense bias to at least one sense plate of the MEMS gyroscope, wherein the variable sense bias is operable to apply a sense bias voltage to the at least one sense plate.
-
11. A system for increasing a dynamic range of a MEMS gyroscope, comprising in combination:
-
a MEMS gyroscope including at least one sense plate;
sense electronics connected to the at least one sense plate, wherein the sense electronics includes a gain; and
an automatic gain control loop, wherein the automatic gain control loop is a feedback loop formed by connections between the gain, FET switches, and a microprocessor. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. A system for increasing a dynamic range of a MEMS gyroscope, comprising in combination:
-
a tuning fork gyroscope including at least one sense plate;
sense electronics connected to the at least one sense plate, wherein the sense electronics includes a gain; and
an automatic gain control loop, wherein the automatic gain control loop is a feedback loop formed by the connections between the gain, FET switches, and a microprocessor, wherein the microprocessor is operable to detect a voltage level at the output of the gain and compare the voltage level with a reference voltage, and wherein the microprocessor is operable to open and close the FET switches, thereby controlling a scale factor of the tuning fork gyroscope. - View Dependent Claims (25)
-
-
26. A method for increasing a dynamic range of a MEMS gyroscope, comprising in combination:
-
detecting an output of a gain located in sense electronics, wherein the sense electronics are connected to a MEMS gyroscope;
comparing the output of the gain with a reference voltage;
adjusting the output of the gain, thereby controlling a scale factor of the MEMS gyroscope. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
-
Specification