2SA1978 Datasheet, PDF (2/10 Pages) NEC – PNP EPITAXIAL SILICON TRANSISTOR MICROWAVE AMPLIFIER

SWITCHING CHARACTERISTICS
Parameter
Symbol
Vin = 1 V
Unit
TYP
Turn-on Delay Time ton (delay)
1.10
ns
Rise Time
tr
0.77
ns
Turn off Delay Time toff (delay)
0.40
ns
Fall Time
tf
0.79
ns
SWITCHING TIME MEASUREMENT CIRCUIT
VCC ( – )
RC1
RC2
RL1
RL2
VOUT
Vin
RS
Sampling
Oscilloscope
50 Ω
VSS ( – )
NE97833 / 2SA1978
Vin
ton (delay)
VOUT
20 ns
tr
toff (delay) _tf
RE
VEE ( + )
Vin = 1 V, VBB = −0.5 V, RC1 = RC2
RS
RC
RL1
RL2
RE
VEE
VCC
(Ω)
(Ω)
(Ω)
(Ω)
(Ω)
(V)
(V)
160
1k
200
250
2.7 k
27
26.3
2