Abstract: In a zero point balancing system employing a balance capacitor switched by means of semiconductor switches, balancing errors due to parasitic capacitance of these switches, as well as due to picked up interferences at the output of the operational amplifier, are avoided with the assistance of an RC element connected in a defined fashion.

Abstract: A charge coupled device transversal filter having split electrodes each having a sense portion and a complementary dummy portion. All electrode sense portions are coupled to a single sense line and all dummy portions are connected to a reference voltage. Tap weights are determined by relative lengths of successive sense portions and weighted samples are taken by shifting charge packets from one sense electrode position to a second while sensing the difference in displacement charge induced in successive sense electrodes. The structure is less sensitive to manufacturing tolerances than earlier structures and provides a sense signal with essentially no common mode component to a sense amplifier.