MRF141 Datasheet, PDF (5/8 Pages) Motorola, Inc – N-CHANNEL BROADBAND RF POWER MOSFET

Zo = 10 Ω
VDD = 28 V
IDQ = 250 mA
Pout = 150 W PEP
ZOL* = Conjugate of the optimum load impedance
ZOL* = into which the device output operates at a
ZOL* = given output power, voltage and frequency.
15
7.5
4
Zin
2
30
100
30
150
100
2
f = 175 MHz
ZOL* f = 175 MHz
Figure 11. Input and Output Impedances
BIAS
0 – 12 V
RF INPUT
R1
C4
C1
+
C5
R3
L1
C2
C3
R2
RFC1
+ 28 V
L4
C10
+
– ^C11
DUT
L3
L2
C9
RF
OUTPUT
C6
C7
C8
C1, C2, C8 — Arco 463 or equivalent
C3 — 25 pF, Unelco
C4 — 0.1 µF, Ceramic
C5 — 1.0 µF, 15 WV Tantalum
C6 — 25 pF, Unelco J101
C7 — 25 pF, Unelco J101
C9 — Arco 262 or equivalent
C10 — 0.05 µF, Ceramic
C11 — 15 µF, 35 WV Electrolytic
L1 — 3/4″, #18 AWG into Hairpin
L2 — Printed Line, 0.200″ x 0.500″
L3 — 7/8″, #16 AWG into Hairpin
L4 — 2 Turns, #16 AWG, 5/16 ID
RFC1 — 5.6 µH, Molded Choke
RFC2 — VK200–4B
R1 — 150 Ω, 1.0 W Carbon
R2 — 10 kΩ, 1/2 W Carbon
R3 — 120 Ω, 1/2 W Carbon
Figure 12. 175 MHz Test Circuit (Class AB)
MOTOROLA RF DEVICE DATA
MRF141
5