Measurement of Battery and Ambient Temperature
The temperature is measured as a voltage equivalent of the temperature on the
for the ambient temperature by the EGAIM.
The battery temperature is measured directly at (l3) of the EGOLD+. For this,
the integrated Σ∆ converter of the EGAIM of the RX-I base band branch is used.
This Σ∆ converter compares the voltage of
internally with a
reference voltage BREF.
Via an analog multiplexer, either the RX-I base band signal, or the TBAT signal
signal can be switched to the input of the converter.
from the EGOLD+
(GSM TDMA-TIMER G11)
measurement and is used to generate to
by the help of
Measurement of the Battery Voltage
The measurement of the battery voltage is done in the Q-branch of the EGAIM.
is connected via a voltage divider R118,
to the EGOLD+
(Input limitation 1.33V to 5.91V) .An analog multiplexer does the
switching between the baseband signal processing and the voltage
Page 33 of 46
ICM MP CCQ ST
C45, M50 AND MT50
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