Systems and methods for an adjustable filter engine

摘要

Systems and methods are provided for an adjustable filter engine. In particular, an electronic system is provided that can include a focus module, memory, and control circuitry. In some embodiments, the focus module can include an adjustable filter engine and a motor. By using the adjustable filter engine to generate a filter with a large number of filter coefficients, the control circuitry can accommodate a variety of system characteristics. For example, by generating a set of cumulative coefficients and re-arranging the order of the cumulative coefficients, the control circuitry can reduce the bit-width requirements of the adjustable filter engine hardware. For instance, the control circuitry can reduce the number of multipliers required to perform a convolution between an updated filter and one or more input signals. In some embodiments, the updated filter can be generated to reduce oscillations of the motor movement due to a new position request.

主权项

1. A method of generating an updated filter, the method comprising:
receiving a set of filter coefficients; generating a set of cumulative coefficients from the set of filter coefficients, each element of which corresponding to an accumulation of one or more coefficients of said set of filter co-efficients; storing the set of cumulative coefficients in a memory included in an electronic device; adjusting at least one parameter associated with the set; accessing one or more cumulative coefficients of the set based at least in part on the at least one parameter; and generating an updated filter based on the one or more cumulative coefficients, by at least one of selectively accessing and rearranging the order of ones of said stored cumulative coefficients.