Methods and apparatus for a processing circuit
Various embodiments of the present technology may provide a method and apparatus for a processing circuit. The processing circuit may include an amplifier and other processing circuitry that operate together to process and/or adjust a gyro signal. The processing circuit may include an integration circuit configured to compute a first value and adjust the first value to a predetermined maximum value if the first value is greater than the predetermined maximum value. The processing circuit may also include a gain control circuit configured to compute a first coefficient based on the first value; select one of: the first coefficient and a second coefficient; and adjust a gain of the amplifier according to the selected coefficient.
1. A processing circuit for a gyro signal, comprising:
an amplifier configured to apply a gain to the gyro signal and generate an amplified gyro signal;
an integration circuit connected to an output terminal of the amplifier and configured to:
receive the amplified gyro signal;
compute a first value using the amplified gyro signal; and
adjust the first value to a predetermined maximum value if the first value is greater than the predetermined maximum value; and
a gain control circuit configured to:
compute a first coefficient based on the first value;
select one of: the first coefficient or a second coefficient; and
adjust the gain according to the selected coefficient.
2. The processing circuit according to claim 1 , wherein the gain control circuit computes the first coefficient based on the second coefficient.
3. The processing circuit according to claim 1 , wherein the gain control circuit computes the first coefficient based on a predetermined minimum value.
4. The processing circuit according to claim 3 , wherein the predetermined minimum value is less than the predetermined maximum value.
5. The processing circuit according to claim 1 , wherein the gain control circuit is further configured to compute an absolute value of the first value.
6. The processing circuit according to claim 1 , wherein the gain control circuit selects the first coefficient if an absolute value of the first value is greater than or equal to the predetermined minimum value.
7. The processing circuit according to claim 1 , wherein the gain control circuit selects the second coefficient if the absolute value of the first value is less than the predetermined minimum value.
8. A method for adjusting a gain of a gyro signal, comprising:
amplifying the gyro signal using a variable gain;
computing a first value using the amplified gyro signal and a predetermined maximum value;
computing a new coefficient using the first value, a predetermined minimum value and a starting coefficient;
selecting one of the new coefficient or the starting coefficient as an output value; and
adjusting the variable gain of the gyro signal according to the at least one of the new coefficient or the starting coefficient.
9. The method according to claim 8 , wherein selecting one of the new coefficient or the starting coefficient as the output value comprises comparing an absolute value of the first value to the predetermined minimum value.
10. The method according to claim 8 , wherein the new coefficient is selected if an absolute value of the first value is greater than or equal to the predetermined minimum value.
11. The method according to claim 8 , wherein the starting coefficient is selected if the absolute value of the first value is less than the predetermined minimum value.
12. The method according to claim 8 , wherein computing the first value comprises limiting the first value to the predetermined maximum value.
13. A system, comprising:
a gyro sensor configured to generate a gyro signal;
a processing circuit connected to the gyro sensor and comprising:
at least one of: a noise cancelling circuit, an offset cancelling circuit, or a phase control circuit;
an integration module connected to an output terminal of the at least one of the noise cancelling circuit, the offset cancelling circuit, and the phase control circuit; wherein the integration circuit is configured to:
amplify the gyro signal using a variable gain and generate an amplified gyro signal;
compute a first value using the amplified gyro signal and a predetermined maximum value;
compute a new coefficient based on a predetermined minimum value and a starting coefficient;
select one of the new coefficient or the starting coefficient as an output value; and
adjust the variable gain of the gyro signal according to the selected coefficient.
14. The system according to claim 13 , wherein the integration module comprises an amplifier configured to receive the gyro signal and control the gain of the gyro signal according to the at least one of the new coefficient and the starting coefficient.
15. The system according to claim 13 , wherein computing the new coefficient is further based on the first value.
16. The system according to claim 13 , wherein computing the first value comprises limiting the first value to the predetermined maximum value.
17. The system according to claim 13 , wherein the integration module is further configured to compute an absolute value of the first value.
18. The system according to claim 13 , wherein selecting one of the new coefficient or the starting coefficient as the output value comprises comparing an absolute value of the first value to the predetermined minimum value.
19. The system according to claim 13 , wherein the new coefficient is selected if an absolute value of the first value is greater than or equal to the predetermined minimum value.
20. The system according to claim 13 , wherein the starting coefficient is selected if the absolute value of the first value is less than the predetermined minimum value.