User Guide

PAMS
Technical Documentation
NSE–8/9
System Module
Page 2– 75
Issue 1 07/99
DC Regulators
The transceiver has a multi function power management IC, which
contains among other functions 7 pcs of 2.8 V regulators. All regulators
can be controlled individually with 2.8 V logic directly or through a control
register. However, in the chosen configuration of the CCONT, direct
control is only used with VR1. The control register is used to switch off the
regulators when they are not in use.
The CCONT also provides a 1.5 V reference voltage for the SUMMA. This
reference voltage is used for the DACs and ADCs in the COBBA too.
The use of the regulators can be seen in the Power Distribution Diagram.
VR
1
VR
2
VR
4
VR
5
V5V
VR
REF
VCTCXO
DATASELX
DATA_IN/OUT
DATA_CLK
VDC out
BATTERY
PA
SUMMA
CHARGE
PUMPS
VCP
VR
7
VREF
SUMMA
VTX
VRX_1 VRX_2VXO
VSYN_2
CRFU3
LO_BUF
RX/TX/SYN
SUMMA
RX
CRFU3
RX
SUMMA
PLL’s
CRFU3
SUMMA
TX
Serial
Interface
VCXOPWR
RFReg
D1
D3 D4 D6
CtrlReg1
D0
>=1
0
0
0
CCONT–ASIC
SWITCHER
Figure 21. Power Distribution Diagram
N702
VR
UHF–VCO
VHF–VCO
VDC out