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Measurement of Battery and Ambient Temperature
The battery temperature is measured via the voltage divider R1387,
For this, the integrated Σ∆ converter of the RX-I base band branch is used. This Σ∆
Interface P2).
converter compares the voltage of
the RX-I base band signal, or the TBAT signal and the
converter. The signal
MEAS_ON
measurement The ambient temperature
.
Interface P3)
Measurement of the Battery Voltage
The measurement of the battery voltage is done in the Q-branch of the EGOLD+, for this
connected via a voltage divider R143,
does the switching between the baseband signal processing and the voltage measurement.
V 1.10
A52/A55/C55 IFX
TBAT
and
TENV
from the EGOLD+
TENV
is measured directly at of the EGOLD+
R146
to the EGOLD+
Page 20of 45
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R138
internally. Through an analogue multiplexer, either
TENV
signal is switched to the input of the
activates the battery voltage
(GSM TDMA-TIMER H15)
(Analog Interface P1)
by the EGOLD+
(Analog
(Analog
BATT+
. An analogue multiplexer
ICM MP CCQ GRM
08/03
is
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