May 1992

2

Philips Semiconductors

Objective specification

Antenna diversity circuit

TEA6101/T

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

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.

QUICK REFERENCE DATA

ORDERING INFORMATION

Notes

1. SOT102-1; 1996 September 10.

2. SOT163-1; 1996 September 10.

SYMBOL

PARAMETER

MIN.

TYP.

MAX.

UNIT

positive supply voltage

−

8.5

−

V

positive supply current

−

14

−

mA

audio input voltage (peak-to-peak value)

−−

3V

antenna switch output current (source/sink)

−−

7mA

−3 dB audio attenuation (soft mute)

−

1.45

−

V

operating ambient temperature range

−30

−

+85

°C

EXTENDED TYPE NUMBER

PACKAGE

PINS

PIN POSITION

MATERIAL

CODE

TEA6101

18

DIL

plastic

TEA6101T

20

SO

plastic