参数资料
型号: MMBF5484LT3
厂商: ON SEMICONDUCTOR
元件分类: 小信号晶体管
英文描述: VHF BAND, Si, N-CHANNEL, RF SMALL SIGNAL, JFET, TO-236AB
封装: PLASTIC, CASE 318-08, 3 PIN
文件页数: 23/38页
文件大小: 467K
代理商: MMBF5484LT3
MMBF5484LT1
4–175
Motorola Small–Signal Transistors, FETs and Diodes Device Data
NF
,NOISE
FIGURE
(dB)
2.0
VDS, DRAIN–SOURCE VOLTAGE (VOLTS)
Figure 2. 100 MHz and 400 MHz Neutralized Test Circuit
0
10
2.0
4.0
6.0
8.0
0
4.0
6.0
8.0
10
12
14
ID = 5.0 mA
100 MHz
VDS = 15 Vdc
f1 = 399 MHz
f2 = 400 MHz
NF
,NOISE
FIGURE
(dB)
2.0
ID, DRAIN CURRENT (mA)
1.5
6.5
2.5
3.5
4.5
5.5
0
4.0
6.0
8.0
10
12
14
Figure 3. Effects of Drain–Source Voltage
Figure 4. Effects of Drain Current
NOISE FIGURE
(Tchannel = 25°C)
*L1
17 turns, (approx. — depends upon circuit layout) AWG #28
enameled copper wire, close wound on 9/32
″ ceramic coil
form. Tuning provided by a powdered iron slug.
*L2
4–1/2 turns, AWG #18 enameled copper wire, 5/16
″ long,
3/8
″ I.D. (AIR CORE).
*L3
3–1/2 turns, AWG #18 enameled copper wire, 1/4
″ long,
3/8
″ I.D. (AIR CORE).
**L1
6 turns, (approx. — depends upon circuit layout) AWG #24
enameled copper wire, close wound on 7/32
″ ceramic coil
form. Tuning provided by an aluminum slug.
**L2
1 turn, AWG #16 enameled copper wire, 3/8
″ I.D.
(AIR CORE).
**L3
1/2 turn, AWG #16 enameled copper wire, 1/4
″ I.D.
(AIR CORE).
Adjust VGS for
ID = 50 mA
VGS < 0 Volts
NOTE:
The noise source is a hot–cold body
(AIL type 70 or equivalent) with a
test receiver (AIL type 136 or equivalent).
Reference
Designation
VALUE
100 MHz
400 MHz
C1
7.0 pF
1.8 pF
C2
1000 pF
17 pF
C3
3.0 pF
1.0 pF
C4
1–12 pF
0.8–8.0 pF
C5
1–12 pF
0.8–8.0 pF
C6
0.0015
F
0.001
F
C7
0.0015
F
0.001
F
L1
3.0
H*
0.2
H**
L2
0.15
H*
0.03
H**
L3
0.14
H*
0.022
H**
INPUT
TO 50
SOURCE
NEUTRALIZING
COIL
L1
C5
L3
Rg′
C1
C6
C4
L2
C3
TO 500
LOAD
CASE
C7
COMMON
ID = 5.0 mA
VGS
VDS
+15 V
C2
Pin, INPUT POWER PER TONE (dB)
+40
Figure 5. Third Order Intermodulation Distortion
P
,OUTPUT
POWER
PER
T
ONE
(dB)
out
16
18
20
f = 400 MHz
100 MHz
VDS = 15 V
VGS = 0 V
+20
0
–20
–40
–60
–80
– 100
– 120
– 140
– 160
– 120
– 100
– 80
– 60
– 40
– 20
0
+ 20
3RD ORDER INTERCEPT
FUNDAMENTAL
OUTPUT @ IDSS,
0.25 IDSS
3RD ORDER IMD
OUTPUT @ IDSS,
0.25 IDSS
INTERMODULATION CHARACTERISTICS
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