Patent ID: 6477199
Filing Date: 2002-11-05
Classification: G01R,H04B,H04L

Abstract:
A method for reducing power consumption of an integrated circuit digital filter, the filter having an initial set of active coefficients, an input and an output, the active coefficients being ordered, a lowest ordered active coefficient being proximal to the input, each of the active coefficients having a stable value, the method comprising the operations of:(a) determining a threshold value; (b) comparing an active coefficient with the threshold value; (c) deactivating the active coefficient if a criterion is satisfied; (d) repeating the operations of comparing and deactivating for other active coefficients of the initial set; (e) providing a specified error; (f) computing an error metric; (g) updating the threshold value if a first criterion is satisfied; and (h) repeating operations (b), (c) and (d) if the threshold value is updated.