Datasheet

BFT25A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 5 — 12 September 2011 8 of 15
NXP Semiconductors
BFT25A
NPN 5 GHz wideband transistor
See Table 10;
Z
o
= 50 .
Average gain parameter: MSG = 7.7 dB.
Fig 13. Noise circle figure.
Table 10. Noise parameters
f (MHz) V
CE
(V) I
C
(mA) F
min
(dB) 
opt
R
n
/50
(mag) (ang)
2000 1 1 2.4 0.72 26 1.7
mcd110
0.2
0.5
1
2
5
0.2
0.5
1
2
5
10
10
0
5
0.50.2 2
1
10
+ j
− j
∞
stability
circle
pot. unst.
region
7 dB
5 dB
6 dB
MSG
7.7 dB
3 dB
4 dB
F
min
= 2.4 dB
Γ
opt