Tektronix 576 - Page 36

Operating Inst r uctions-Ty pe 576
ΙςΒΟ an d Β V ςΒΟ

Collector-base lea kage c u rrent and collector-base brea k down voltage (emitter op en) is
measure d t h e same as ΙςΕΟ and ΒV ςΕΟ exce p t t h at t he Te r min al Selector switc h is set
to EM ITT ER T ERM OPEN (O R ΕΧΤ
) .
ΙΕΒΟ
and Β V
ΕΒΟ
9
m
(Small Sig
n al)
2- 28
E mitter-base lea k age curre n t an d emitte r -base brea k down voltage (collecto r o pen ) is
measured t he same as ΙςΒΟ and Β V ςΒρ exce p t t h at t h e device terminals are inverted in
t he device testing soc k et (collector lea d in t he emitter terminal of t he soc k et an d t he
emitter lead in t he collector terminal) .
FI EL D EFFE CT T R AN SISTO RS
Re q uired Ty pe 576 Control Settings
Common-Source F amily
MENNEEMENE
MENNEENEEN
Γ ~ Γ
~
1~
~1
1
Τ
~
ΙιιιαΕ S ιιιι
ID Vs- VUS
fo r
d iffe r e n t values of
VGS
R

5 1 1 7
3
ω Τ ν

μ Α
ΙΕΡ
Some Commo n M easu r ements
g m (Static)

T he static transcon d ucta n ce (source grounded) is Ι ρ / V
GS .
The small-sig n al transcon d ucta n ce (source groun ded) is οΙρ /
A
V
GS
. To
determi ne
gm
at
various p oints in α family of cu rves, multiply t he vertical se
p
aratio
n of two ad j acent
cu rves by t h e β O R
g m
PER DI V rea
d
out .
To
ma ke α more accurate measurement, see
ste p s 69 t h roug h 74 of t he First Time O p eratio n instructio n s .
Co n trol R e q uired Setting
H O R IZO N TA L CO LLE CTOR
P O L A R ITY +( ΝΡΝ ) for Ν -c hann el device ; -( ΡΝΡ ) for
Ρ -c han nel d evice
PEAK P O WER W ATTS L ess t han maxim u m p ower rating of device
A MPL IT UD E V oltage Ste p s
ST
EP
S P resse d
Terminal Selecto r EM ITT
ER G
R O
U
N D E D BAS E T ERM STEP
G EN
E nh ancement
De
p
letion
P O L A R ITY I NVER
T
R elease d
Pr
esse
d
O
FF
S E T wit h P O L A R ITY
I
NVER T bu tto n p resse d
O PP OS E Z ER O or AID
0
)
Ζ
ξ
.
ι .
υυ . . Ι ι . . . . . ι . . ι
//
ι ί _
£}= . ν