UV-activated conductances allow for multiple time scale learning

Author

Benson, Ronald G. ; Kerns, Douglas A.

Author_Institution

Comput. & Neural Syst. Program, California Inst. of Technol., Pasadena, CA, USA

Volume

4

Issue

3

fYear

1993

fDate

5/1/1993 12:00:00 AM

Firstpage

434

Lastpage

440

Abstract

Ultraviolet (UV) photoinjection of electrons through SiO₂ provides a convenient and simple method for programming analog, nonvolatile memories in CMOS circuits. The time scales involved in the UV programming process are well suited to multiple time scale learning algorithms providing several orders of magnitude in programming rate. The method requires no special processing technology. Measured characteristics of the UV photoinjection devices and experimental results from a synapse circuit built using these devices are presented. This synapse circuit includes a continuously adjustable weight, an electronic learn/hold control and slow forgetting dynamics, while allowing an unimpeded multiplication operation at all times

Keywords

CMOS integrated circuits; PLD programming; learning (artificial intelligence); neural chips; CMOS circuits; UV-activated conductances; continuously adjustable weight; electronic learn/hold control; forgetting dynamics; multiple time scale learning; nonvolatile memories; photoinjection; synapse circuit; unimpeded multiplication operation; CMOS analog integrated circuits; CMOS technology; Circuit testing; Dielectric measurements; EPROM; Electrons; Nonvolatile memory; Silicon; Tunneling; Voltage;

fLanguage

English

Journal_Title

Neural Networks, IEEE Transactions on

Publisher

ieee

ISSN

1045-9227

Type

jour

DOI

10.1109/72.217185

Filename

217185