Patent · US Expired

Single electrode sense circuit for charge-coupled transversal filters

US4330769A · kind A · utility

2Cited by
1References
20Claims
0Family size

Assignee

Inventors

Key dates

Filing dateFeb 7, 1980
Grant dateMay 18, 1982
Priority date
Expiry dateFeb 7, 2000

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH03H15/02
  • WIPO fieldBasic communication processes
  • WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.