Integrated low power digital gyro control electronics
First Claim
1. A distributed digital control circuit device comprising:
- a digital drive controller circuit for producing a drive signal for exciting a drive mode of a vibratory gyroscope to a substantially constant amplitude from a drive mode response signal;
a digital rebalance controller circuit for producing a sense rebalance signal from a sense mode response signal to regulate a sense mode of the vibratory gyroscope to substantially zero; and
a digital demodulator for demodulating the sense rebalance signal with the drive mode response signal to produce a digital rate estimate of the vibratory gyroscope.
4 Assignments
0 Petitions
Accused Products
Abstract
Embodiments of the invention generally encompass a digital, application specific integrated circuit (ASIC) has been designed to perform excitation of a selected mode within a vibratory rate gyroscope, damping, or “force-rebalance,” of other modes within the sensor, and signal demodulation of the in-phase and quadrature components of the signal containing the angular rate information. The ASIC filters dedicated to each channel may be individually programmed to accommodate different rate sensor designs/technology or variations within the same class of sensors. The ASIC architecture employs a low-power design, making the ASIC, particularly suitable for use in power-sensitive applications.
52 Citations
30 Claims
-
1. A distributed digital control circuit device comprising:
-
a digital drive controller circuit for producing a drive signal for exciting a drive mode of a vibratory gyroscope to a substantially constant amplitude from a drive mode response signal;
a digital rebalance controller circuit for producing a sense rebalance signal from a sense mode response signal to regulate a sense mode of the vibratory gyroscope to substantially zero; and
a digital demodulator for demodulating the sense rebalance signal with the drive mode response signal to produce a digital rate estimate of the vibratory gyroscope. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A method of operating a vibratory gyroscope comprising the steps of:
-
producing a drive signal for exciting a drive mode of a vibratory gyroscope with a digital drive controller circuit to a substantially constant amplitude from a drive mode response signal;
producing a sense rebalance signal from a sense mode response signal with a digital rebalance controller circuit to regulate a sense mode of the vibratory gyroscope to substantially zero; and
demodulating the sense rebalance signal with the drive mode response signal using a demodulator to produce a digital rate estimate of the vibratory gyroscope. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
-
Specification