Pulnix TM-7EX Manual de usuario descargar pdf (Pagina 9)

eEcTtöN 7

CCD CHARACTEBISTICS

AND

OPERATION

7.1 THEORY OF

OpERAT|ON (OpeGlon

principte

ot

A CCO

(Clralge

Coupled

Device)

onsrsrs

o{

MoS

(Melar

oride sehiconduclotcapacibß

aranqed in a

reaularamy ll

basically

peno.mslh@e

Junctions

connecrcd wilh handling

cliarqes:

1 Phoberedricconve6ion

(phorösensor).

ncdanr riqhr

0enerarcs

charceson

the rvtos

.äpäd[örs, w]lrr

lhe

quanlty

ol charge

borng

Propo'1ro.arb

lrre b ghhess.

2.

Accunulalon

olcharces.

When avotage

is applied

lo rhe

e eclrödes

oi lhe MOS

capac

roß.

an eleckid porentia

we

isbmedtnlhe

sjicönlaye.

The charoe

is accuh

3

Transmission

or charqe

when

ä high voltäge is

apptied

rolhe

etecr@des, a

deeperwerris rohed;when

a row vo[aqe

is apptied, a

sharowerweLris

lormed.

Inlhe ccD,

rhis

prcDenyis

lsedlotansmllhecha.go.

whenahiqhvol€oeis

aFpliedlolhe €reclrodes,

a deep

etectic

polenrial

wetl

rs romed, and

charqe riows

int6n

a neahbo nawel,

wren

lrris rs repealed

overandoveramono

rhe

resuraiy

aranqad

eleclrodes,

lhe charoe

is ranste.ed

,rodone MOS.apacilortoanoher

Thisisrhe

prncipre

o,

cco dharoe

l.ansmssion.

7?

MECHANISM

OF CCD CHARGETRANSFEF

Tne venica

shi,r re!islerlGnsteß

charges

!si.aq

a Jour

pnäse

dnve

mode. Figu@ r

shows an

exampbol

lhe

chanses

which

€nomr n

polemialwets

i,isuccessrp

rhe nreNars.

at

t0, rhe etedrode vonases

äre

(vl

=

v2>(v3 =

V4),

sothe

pole.

arwelsaredeepertowaß

hc

eredrode

ar lhe higher voltaqes v1

and v2.

Chaqesa@umutaß

in

these deep wells.

Aü1,

rhe

oredrode

vörrases

are

(V1 =

v2

-

V3)>(v4),

so

the

charges

a@umurare in

lhe

weLls

lowrd

lhe e ectrode

al

vi, v2 and

v3. al

12, fie e ectode

wtlaoes

are rv2

=

vs)>(v4=

v1),

so the orrarqes accumunü

m

ru w-.rh

rowad

rhe etelode

at V2 and Vi

Elecr@de

vo

Gqe

srares

ar ß aid

alrs a.e shown helow

l3(v1

=

v2>1V3

=

Va)

{

nirial

sIale)

Inese

0p.ralrons

are

repealed

lo e

.il

Tle horizonrarsi'il'oq'srerransteß

crrarges

ds nq

a

rso

ph.scdrivP

mde

successve

I me inleryals.

Al r1, thd etecrrode

vollaoes

redeepdloward

rhe e ecltude

ollhe

htqtrervo[a!e r]i

Thecharqes

accumurate

in rtrese

we[s. al 12,

the elecröd,a

votaqos

H1

and

H2 arc invened.

lhe wefis

toward the

eLeckode

al volage

H2

become d

become

shallöwer

So rhe we

s ai

H2 are

deeperlha

towad

the cl.drcde

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 31 32

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