TDA7406 Datasheet, PDF (30/64 Pages) STMicroelectronics – Car radio signal processor

Stereodecoder part
TDA7406
5.3
Dual MPX Usage
0.0.1 Feature Description
The TDA7406 is able to support a twin tuner concept via the Dual-MPX-Mode. The DC-
Voltage at the CMPX-pin controls whether one or both MPX-signals are used to decode the
stereo FM-signal. Therefor two window-comparators with a characteristic as shown in
Figure 19 are implemented (Please note that the thresholds have a hysteresis of 500mV).
In this mode the stereodecoder high impedance-mute mutes both inputs in parallel.
Figure 19. Block diagram Dual MPX
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