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| U4065B Datasheet, PDF (19/34 Pages) TEMIC Semiconductors – FM Receiver | |||
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Mixer
fOSC = 110.7 MHz, VOSC24 â
160 mV, fIF = 10.7 MHz
Figure 27. Mixer Principle Application
50
2 VIRF1
fRF1
2 VIRF2
fRF2
IL1
12
56
14
Mixer
15
18
IL2
21
19
65
U4065B
VOIF
50
RG24
24
Local
47p
23
oscillator
VS
22p
fOSC
Tamb
Conversion power gain GC = 20 log (VOIF/VIRF) + IL1 (dB) + IL2 (dB)
IL1, IL2 insertion loss of the RF transformers
Figure 28. Mixer Characteristic
120
100
Conversion characteristic
80
60
40
3rd order
IM-characteristic
20
0
0
20
40
60
80
100
120
VIRF1, VIRF2 (dBµV)
19
4807AâAUDRâ05/04
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