TEA6101/T

General description

Intended for multi-antenna FM car radio reception (antenna diversity system), the TEA6101/T selects the most favourable signal from one of up to four antennae. Founded upon audible signal disturbance the criteria are derived from two signals: high frequency components (e.g. spikes due to noise and multipath reception) and variations in signal level as a result of multipath reception or fluctuations in field strength.

Features

• Ability to switch between up to four antennae
• Switching signal derived from two signals: the audio and the level signals
• Floating switching threshold adjusts switching rate to prevailing circumstances:
  - increasing threshold due to excessive noise
  - increasing threshold due to numerous level variations
• Memory for the most favourable antenna signal to overcome unnecessary switching
• Signal-dependent `soft` muting circuit
• Mode selection to the first antenna receiving an AM signal whilst the diversity system is reset.

Applications

• Car radio receivers
• Mobile radio communications equipment

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