MRF858 Datasheet, PDF (3/6 Pages) Motorola, Inc – NPN SILICON RF POWER TRANSISTOR

R1
R2
R3
INPUT
V_SUPPLY
+
R8
VCE
F1
C1
Q1
Q2
R4
R5
R7
R6
TL1
C8
L1
C15
+
B1
C2
C3
L2
B2
C4
C7
L3
C9
DUT
C16
L4
C11
TL4
+
C5
C15 TL5
C12
C10
C13
C14
C6
OUTPUT
TL2
TL3
0.685″
B1, B2
Short Ferrite Bead, Fair Rite (2743021447)
C1
250 µF, 50 Vdc Electrolytic Capacitor
C2, C5
10 µF, 50 Vdc Electrolytic Capacitor
C3, C6
0.1 µF, Chip Capacitor
C4, C7
100 pF, Chip Capacitor
C8, C15
43 pF, 100 Mil Chip Capacitor
C9, C10
10 pF, Mini–Unelco
C11
5 pF, Mini–Unelco
C12, C13, C14 0.8 – 8.0 pF, Johanson Gigatrim
C15, C16
1000 pF, Chip Capacitor
F1
1 A Micro–Fuse
L1, L2
10 Turns, 20 AWG, 0.150″ ID (10 Ω 1/2 W Resistor)
L3
4 Turns, 16 AWG, 0.101″ ID
L4
0.5″ 18 AWG Wire
Q1
MMBT2222ALT1, NPN Transistor
Q2
BD136, PNP Transistor
R1
R2
R3
R4
R5
R6
R7
R8
TL1, TL5
TL2
TL3
TL4
V_Supply
VCE
Board
390 Ω, 1/4 W
500 Ω Potentiometer, 1/4 W
7.5K Ω, 1/4 W
2 x 4.7K Ω, 1/4 W
56 Ω, 2 W
75 Ω, 1/4 W
4.7 Ω, 1/4 W
4 Ω, 10 W
50 Ω, Microstrip Transmission Line
Microstrip Transmission Line
Microstrip Transmission Line
Microstrip Transmission Line
+ 26 Vdc ± 0.5 Vdc Due to Resistor Tolerance
+ 24 Vdc @ 0.5 A
0.030″ Glass–Teflon^® 2 oz. Cu, ε_r = 2.55
Figure 1. MRF858 Class A RF Test Fixture Schematic
MOTOROLA RF DEVICE DATA
MRF858 MRF858S
3