Nokia 9110 Service Manual
PAMS
Technical Documentation
RAE–2
BS8_RF
Page 3 – 8
Original 02/99
DC characteristics
Regulators
Transceiver has got a multi function power management IC, which con-
tains among other functions, also 7 pcs of 2.8 V regulators. All regulators
can be controlled individually with 2.8 V logic directly or through control
register. In GSM direct controls are used to get fast switching, because
regulators are used to enable RF–functions.
tains among other functions, also 7 pcs of 2.8 V regulators. All regulators
can be controlled individually with 2.8 V logic directly or through control
register. In GSM direct controls are used to get fast switching, because
regulators are used to enable RF–functions.
Use of the regulators can be seen in the power distribution diagram.
CCONT also provides 1.5 V reference voltage for SUMMA and CRFU1a
( and for DACs and ADCs in COBBA too ).
( and for DACs and ADCs in COBBA too ).
All control signals are coming from MAD and they are 2.8 V logic signals..