Table of Contents
Advertisement
a) Measurement of Battery and Ambient Temperature
The temperature is measured as a voltage equivalent of the temperature on the
voltage dividers
R115,R116,R117
R120
for the ambient temperature from the EGAIM.
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
and the
TENV
signal can be switched to the input of the converter.
The signal
MEAS_ON
measurement and is used to generate to
b) Measurement of the Battery Voltage
The measurement of the battery voltage is done in the Q-branch of the EGAIM.
For this
BATT+
is connected via a voltage divider R113,
(Input limitation 1.33V to 5.91V) .An analog multiplexer does the
(GAIM N2)
switching between the baseband signal processing and the voltage
measurement.
V1.0
A35-A36-A40
for the battery temperature and R118,R119,
from the EGOLD+
(GSM TDMA-TIMER G11)
BREF
Page 30 of 38
Company Confidential
TBAT
and
TENV
activates the
by the help of
R121,R122
R114
to the EGOLD+
Notes
ICM MP CC ST
09/01
Advertisement
Table of Contents
