SD2931-10_03 Datasheet, PDF (12/16 Pages) STMicroelectronics – RF power transistors HF/VHF/UHF N-channel MOSFETs

Test circuit 30 MHz
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Test circuit 30 MHz
Figure 22. 30 MHz test circuit schematic (engineering test circuit)
SD2931-10
Figure 23. 30 MHz test circuit component part list
Symbol
Description
T1
9:1 transformer, 25 Ω flexible coax with extra shield .090 OD 15” long
T2
1:4 transformer, 50 Ω flexible coax .225 OD 15” long
FB1
Toroid 1.7” OD .30” ID 220 µ 4 turns
FB2
Surface mount EMI shield bead
FB3
Toroid 1.7” OD .300” ID 220µ 3 turns
RFC1
PCB
R1, R3
R2
Toroid 0.5” OD 0.30” ID 125µ 4 turns 12 awg wire
0.62” Woven Fiberglass, 1 oz. Copper, 2 Sides, εr = 2.55
1 KΩ 1 W chip resistor
680 Ω 3 W wirewound resistor
C1,C4,C6,C7,C8,C
9,
0.1 µF ATC chip cap
C11,C12,C13
C2,C3
750 pF ATC chip cap
C5
470 pF ATC chip cap
C10
10 µF 63 V electrolytic capacitor
C14
100 µF 63 V electrolytic capacitor
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