
Test Circuits
NPN RF Transistor
(continued)
VCC = 12 V
270 Ω
200 mHz
Input
1000 pF
100 pF
RS
L2
RL
1000 pF
L1
1000 pF
0.8-10 pF
200 mHz Output into
50Ω
1000 pF
2.2 KΩ
VBB
390 Ω
L1 - Ohmite Z-235 RFC
L2 - L6 turns No. 14 wire, 1 inch L x 1/4 inch ID tapped 1
1/2 turns from cold side
FIGURE 1: Unneutralized 200 MHz PG and NF Test Circuit
MPSH11/MMBTH11, Rev. B