U4065B Datasheet, PDF (16/23 Pages) TEMIC Semiconductors – FM Receiver

U4065B
87.0
86.8
86.6
86.4
86.2
86.0
–30 –10 10 30 50 70 90
94 9423
T_amb ( °C )
AGC threshold (I10 = 1 mA) of the second IF amplifier
versus temperature
10000.00
1000.00
100.00
10.00
1.00
0.10
I10 (–30°C ) / mA
I10 (30°C ) / mA
I10 (90°C ) / mA
0.01
80
85
90
95 100 105
94 9424
vi_IF ( dBmA )
AGC characteristic of the second IF amplifier input
Interference Sensor (Mixer)
50
2vi_RF1
fi_RF1
2vi_RF2
fi_RF2
IL1
15
1
2 _Rg15/16
=200
56
16
Interference
mixer
11
R_L11 = 200
IL2
21
65
f_LO
Local
oscillator
V_S
94 9425
Test conditions for characteristic vo_IF versus vi_RF1:
f_LO = 100 MHz, f_RF1 = 89.3 MHz, vi_RF2 = 0, f_IF = f_LO – f_RF1 = 10.7 MHz
Test conditions for 3rd order IM-characteristic vo_IF versus vi_RF1, vi_RF2:
f_LO = 100 MHz. f_RF1 =89.4 MHz, f_RF2 = 89.5 MHz, f_IF = f_LO – (2 f_RF1 –1 f_RF2) = 10.7 MHz
IL1, IL2 = insertion loss of the RF transformer
vo_IF
f_IF
50
IL1=IL2=0.7dB
16 (23)
Rev. A3, 15-Oct-98