Patent ID: 8461916
Filing Date: 2013-06-11
Classification: G11C,H03H

Abstract:
1. A filter circuit comprising: a plurality of shifting units configured to each store an initial value, receive at least one input signal, and sequentially shift the stored initial value to a next shifting unit, of the plurality of shifting units, in response to the at least one input signal; and an initial value setting unit configured to receive different filter setting signals and a reset signal, set the stored initial values, of the plurality of shifting units, to different sets of stored initial values in response to the different filter setting signals, wherein the different filter setting signals represent different criteria for filtering the at least one input signal, wherein the stored initial values have a first logic value or a second logic value, and wherein the filter circuit is configured to activate an output signal if the first logic value is shifted to a predetermined shifting unit among the plurality of shifting units.