參數(shù)資料
型號(hào): MRF891
廠商: MOTOROLA INC
元件分類: 功率晶體管
英文描述: RF POWER TRANSISTORS NPN SILICON
中文描述: UHF BAND, Si, NPN, RF POWER TRANSISTOR
文件頁數(shù): 2/4頁
文件大小: 116K
代理商: MRF891
MRF891 MRF891S
2–12
MOTOROLA RF DEVICE DATA
ELECTRICAL CHARACTERISTICS — continued
(TC = 25
°
C unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
DYNAMIC CHARACTERISTICS
Output Capacitance
(VCB = 24 Vdc, IE = 0, f = 1.0 MHz)
Cob
6.5
8.0
pF
FUNCTIONAL TESTS
Common–Emitter Amplifier Power Gain (Broadband)
(VCC = 24 Vdc, Pout = 5.0 W, f = 900 MHz)
Gpe
9.0
10
dB
Collector Efficiency
(VCC = 24 Vdc, Pout = 5.0 W, f = 900 MHz)
η
50
57
%
Load Mismatch Stress
(VCC = 24 Vdc, Pin = 0.63 W, f = 900 MHz,
VSWR = 20:1, all phase angles)
ψ
No Degradation in Output Power
Figure 1. Broadband Test Fixture
C1 — 39 pF, 100 Mil Chip Capacitor
C2, C8, C15 — 0.8–8.0 pF Johansen Gigatrim
C3, C4 — 12 pF, Mini–Unelco
C5, C13 — 1000 pF, 350 V Unelco
C6, C14 — 10
μ
F, 25 V Tantalum
C7, C11, C12 — 91 pF, Mini–Unelco
C9 — 5.0 pF, MIni–Unelco
C10 — 47 pF, 100 Mil Chip Capacitor
L1, L6 — 10 Turns #20 AWG Around 10 Ohm 1/2 Watt Resistor
L2, L5 — Ferrite Bead
L3 — 4 Turns #16 AWG Choke
L4 — 0.5
, #18 AWG Wire
T1, T4 — 50 Ohm Microstrip Line
T2 — W = 165 Mils, = 1946 Mils
T3 — W = 166 Mils, = 1563 Mils
PC Board — 0.031
Glass Teflon (
ε
r = 2.56)
C1
T2
T1
T3
T4
SHORTED
PLUG
(FOR
VRE
TEST)
+VCC
GND
DUT
SOCKETS
+
+
C11
C6
C5
L1
L2
C7
L3
C2
C4
C3
C9
L5
L6
C12
C13
C14
C15
C10
C8
L4
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