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參數(shù)資料
| 型號： | BLW87 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 功率晶體管 |
| 英文描述： | VHF power transistor |
| 中文描述： | VHF BAND, Si, NPN, RF POWER TRANSISTOR |
| 封裝： | CERAMIC, SOT-123A, 4 PIN |
| 文件頁數(shù)： | 6/11頁 |
| 文件大小： | 81K |
| 代理商： | BLW87 |
August 1986
6
Philips Semiconductors
Product specification
VHF power transistor
BLW87
APPLICATION INFORMATION
R.F. performance in c.w. operation
(unneutralized common-emitter class-B circuit); T
h
= 25
°
C
List of components:
Component layout and printed-circuit board for 175 MHz test circuit are shown in Fig.8.
f (MHz)
V
CE
(V)
13,5
12,5
P
L
(W)
25
25
P
S
(W)
<
6,25
G
P
(dB)
>
typ. 6,6
I
C
(A)
<
2,64
η
(%)
>
typ. 75
z
i
(
)
1,6
+
j1,4
Y
L
(mS)
210
+
j5,5
175
175
6
70
C1
C2
C3a
C4
C5
C6a
C7
L1
L2
L3
L4
L6
L7
L4 and L5 are strips on a double Cu-clad printed-circuit board with epoxy fibre-glass dielectric, thickness 1/16".
R1
=
10
(
±
10%) carbon resistor (0,25 W)
R2
=
4,7
(
±
5%) carbon resistor (0,25 W)
=
=
=
=
=
=
=
=
=
=
=
=
=
2,5 to 20 pF film dielectric trimmer (cat. no. 2222 809 07004)
C8 = 4 to 40 pF film dielectric trimmer (cat. no. 2222 809 07008)
C3b = 47 pF ceramic capacitor (500 V)
120 pF ceramic capacitor (500 V)
100 nF polyester capacitor
C6b = 8,2 pF ceramic capacitor (500 V)
5 to 60 pF film dielectric trimmer (cat. no. 2222 809 07011)
1 turn Cu wire (1,6 mm); int. dia. 9,0 mm; leads 2
×
5 mm
100 nH; 7 turns closely wound enamelled Cu wire (0,5 mm); int. dia. 3 mm; leads 2
×
5 mm
L8 = Ferroxcube wide-band h.f. choke, grade 3B (cat. no. 4312 020 36640)
L5 = strip (12 mm
×
6 mm); taps for C3a and C3b at 5 mm from transistor
2 turns Cu wire (1,6 mm); int. dia. 5,0 mm; length 6,0 mm; leads 2
×
5 mm
2 turns Cu wire (1,6 mm); int. dia. 4,5 mm; length 6,0 mm; leads 2
×
5 mm
Fig.7 Test circuit; c.w. class-B.
handbook, full pagewidth
C7
50
50
MGP604
C1
C2
C3b
C3a
C6a
C4
C5
R2
L3
C6b
C8
L1
L2
L4
R1
L5
L7
T.U.T.
L6
L8
+
VCC
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