Philips Semiconductors
Objective specification
Antenna diversity circuit
TEA6101/T
FEATURES
GENERAL DESCRIPTION
• Ability to switch between up to four antennae
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.
• 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
QUICK REFERENCE DATA
SYMBOL
VP
PARAMETER
MIN.
TYP.
8.5
MAX.
UNIT
positive supply voltage
positive supply current
−
−
−
−
−
−
−
3
7
−
V
IP
14
−
mA
V
VI(p-p)
Ios
audio input voltage (peak-to-peak value)
antenna switch output current (source/sink)
−3 dB audio attenuation (soft mute)
−
mA
V
VL
1.45
−
Tamb
operating ambient temperature range
−30
+85
°C
ORDERING INFORMATION
EXTENDED TYPE NUMBER
PACKAGE
PINS
PIN POSITION
MATERIAL
CODE
SOT102(1)
SOT163A(2)
TEA6101
18
20
DIL
SO
plastic
plastic
TEA6101T
Notes
1. SOT102-1; 1996 September 10.
2. SOT163-1; 1996 September 10.
May 1992
2