Wire transfer of charge packets using a CCD-BBD structure for charge-domain signal processing

Author

Fossum, Eric R.

Author_Institution

Dept. of Electr. Eng., Columbia Univ., New York, NY, USA

Volume

38

Issue

2

fYear

1991

fDate

2/1/1991 12:00:00 AM

Firstpage

291

Lastpage

298

Abstract

A structure for the virtual transfer of charge packets across metal wires is described theoretically and is experimentally verified. The structure is a hybrid of charge-coupled device (CCD) and bucket-brigade device (BBD) elements and permits the topological crossing of charge-domain signals in low power signal processing circuits. A test vehicle consisting of 8-, 32-, and 96-stage delay lines of various geometries implemented in a double-poly, double-metal foundry process is used to characterize the wire-transfer operation. Transfer efficiency ranging between 0.998 and 0.999 is obtained for surface n-channel devices with clock cycle times in the range from 40 ns to 0.3 ms. Transfer efficiency as high as 0.9999 is obtained for buried n-channel devices. Good agreement is found between experiment and simulation

Keywords

CCD image sensors; computerised picture processing; signal processing equipment; 99.8 to 99.9 percent; CCD-BBD structure; SPICE; bucket-brigade device; buried n-channel devices; charge packets virtual transfer; charge-coupled device; charge-domain signal processing; clock cycle times; delay lines; double-metal foundry process; low power signal processing circuits; metal wires; simulation; surface n-channel devices; transfer efficiency; wire-transfer operation; Charge coupled devices; Circuit testing; Clocks; Delay lines; Electrodes; Foundries; Frequency; Signal processing; Vehicles; Wire;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/16.69908

Filename

69908