N-TH NON-RECURSIVE FILTER CIRCUIT AND ANALOG DELAY LINE

摘要

PURPOSE: To simplify the configuration of an nth non-recursive filter circuit which is used for the processing of video signals, etc. ;CONSTITUTION: By switches w1 to wm for writing, input signals are successively written in capacitors c1 to cm for sample-and-hold with the lapse of time. Switches i1 to im for reading are successively switched by a signal for reading READADDRESSi for the coefficient multiplier of the ith line and the voltage of the capacitors c1 to cm is read. As a result, because all the processings in a delay line, an adder and the coefficient multiplier can be performed by analog signals, an A/D conversion and a D/A conversion are unnecessitated and the configuration becomes simple.;COPYRIGHT: (C)1995,JPO