U4065B Datasheet, PDF (15/23 Pages) TEMIC Semiconductors – FM Receiver

U4065B
2^nd IF Preamplifier
V_S
50
f_IF
2vi_IF
1 : 2 vi_IF5
5
IL1 ^{Rg5 = 200}
12
56
330
IF
3
vo_IF3 ^{2 : 1}
R_L3 = 200
IL2
ÎÎÎ ^Tamb
21
65
Power gain G_IF = 20 log (vo_IF/vi_IF) + IL1 (dB) + IL2 (dB)
IL1; IL2 = insertion loss of the RF transformers
94 9420
vo_IF
50
18.5
18.0
17.5
17.0
16.5
16.0
15.5
15
–30–20–10 0 10 20 30 40 50 60 70 80 90
94 9421
T_amb ( °C )
Power gain of the second IF amplifier versus tempera-
ture
20
18
16
14
12
10
8
6
4
2
0
10 20 30 40 50 60 70 80 90 100
94 9422
f ( MHz )
Power gain of the second IF amplifier versus frequency
Rev. A3, 15-Oct-98
15 (23)