RECURSIVE FILTERS WITH CHARGE TRANSFER DEVICE

摘要

A common channel charge transfer recursive filter has two delay lines, in which charges are transferred in opposite directions. Exchange bridges having two sections extend between the lines. Each section feeds a predetermined charge fraction to one of the two downstream electrodes with charges flowing from the two upstream electrodes. The charge transfer is controlled by a three-phase system (?1,?1,?3). Split memory electrodes and the exchange bridges are connected to the first phase (?1) bus. A transfer electrode is in each gap between an exchange bridge and a memory electrode and is connected to the second phase (?2) bus. A second transfer electrode is connected to the third phase (?3) bus. The gap between a memory electrode and the next exchange bridge is occupied by a transfer electrode connected to the second phase (?2) bus and by a transfer electrode connected to the third phase (?3) bus.