NAD VISO TWO, Service Manual

Page: 48 / 103

Equivalent Circuit
(top view)
Marking
(Q1, Q2 common)
Switching Time Test Circuit
(a) Test circuit (b) V
IN
V
GS
(c) V
OUT
V
DS
KK
6 5 4
3 2 1
Q1
6 5
3
4
2 1
Q2
V
DD
= 1.5 V
D.U.
<
=
1%
V
IN
: t
r
, t
f
< 5 ns
(Z
out
= 50 W )
Common Source
Ta
= 25°C
1.5 V
90%
10%
90%
10%
0
V
DD
V
DS (ON)
t
on
t
off
t
r
t
f
IN
50
9
OUT
I
D
1.5 V
10 m s
V
DD
R
L
V
IN
0
FET : IC14(HN1K05FU)
2- 37