U4276B Datasheet, PDF (4/8 Pages) TEMIC Semiconductors – FM Multipath Noise Cancellation

U4276B
Figure 2.
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In order to achieve best performance, the MNC-circuit
has to be adapted well to the fieldstrength output of the
IF-IC. This can be done by adjustment of the DC-level at
" Pin Mute (R2/R3, see figure 4) in the range of V/2 1 V.
The principle behaviour is shown in figure 3.
Field
strength
t V_Mute
V_S
2
1.17 V
+ V_Mute
V_S
2
95 10694
u V_Mute
V_S
2
MNC activation level (AVFS)
30
Figure 3.
RF level (dBmV)
4 (8)
TELEFUNKEN Semiconductors
Preliminary Information
Rev. A1, 05-Sep-96