SD2921 Datasheet, PDF (7/10 Pages) STMicroelectronics – RF POWER TRANSISTORS HF/VHF/UHF N-CHANNEL MOSFETs

175 MHz Test Circuit Schematic (Production Test Circuit)
VG
+50V
SD2921
Note : All dimensions in inches
REF. 1021579C
175 MHz Test Circuit Component Part List
T1
T2
FB1
FB2, FB3
FB4
L1
PCB
R1, R3
R2
C1, C11
C2
C3, C8, C9
C4
C5
C6
4:1 Transformer, 25 ohm Flexible Coax .090 OD 6 ” Long
1:4 Transformer, 25 ohm Semi-Rigid Coax .141 OD 6 ” Long
Toroid X 2, 0.5” OD .312” ID 850u 2 Turns
VK200
Shield Bead, 1” OD 0.5” ID 850u 3 Turns
1/4Wave Choke, 50 ohm Semi-Rigid Coax .141 OD 12 ” Long
0.062” Woven Fiberglass, 1 oz. Copper, 2 Sides, er = 2.55
470 ohm 1W Chip Resistor R4
20K ohm 10 Turn Potentiometer
360 ohm 1/2W Resistor
R5
560 ohm 1W Resistor
470 pF ATC Chip Cap
C7
30 pF ATC Chip Cap
43 pF ATC Chip Cap
C10
91 pF ATC Chip Cap
Arco 404, 12-65 pF
C12, C15 1200 pF ATC Chip Cap
Arco 423, 16-100 pF
C13, C14 0.01 uF / 500V Chip Cap
120 pF ATC Chip Cap
C16, C17 0.01 uF / 500V Chip Cap
0.01 uF ATC Chip Cap
C18
10 uF 63V Electrolytic Capacitor
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