User Guide

PAMS
System Module DB6
NHB–3
Technical Documentation
Original 26/97
Page 4–40
100 % for SYNTHPWR. In IDLE–mode activities are 0.4 %, 0.0 % and 1.77 %
respectively. The current of each block is controlled independently and for ex-
ample TXPWR and RXPWR are not on at the same time.
Regulators
There is one regulator IC in the RF unit. The regulator IC CRFCONT is an RF
power supply circuit basically intended for digital handportable phones. It has 8
separate linear regulators and power on/off switches for RF–circuitry. Each reg-
ulator can be individually disabled and enabled. It also has a voltage reference
output.
Battery
6 V
VR1 VR2 VR3 VR4 VR5 VR6 VR7 VR8Vbias
VCXO
2 mA
VREF
Switch
Power
Amplifier
TXP
SYNTHPWR
TXPWR
RXPWR
CRFCONT
VPLL:
LMX2331
Negat.volt.
+4V5_TX1:
TX buffer
VHLO:
VHF LO
+4V5_RX:
RF LNA
IF amps
VRX:
VTX:
< 1 mA
18.5 mA
6 mA 17 mA
39 mA
(min 5.3 V)
CRFRT (VB_ext)
35 mA
39 mA
CRFRT (VRX)
CRFRT (VTX)
CRFRT (VTX_slow)
700 mA
VREF
PSL
VB_EXT
+4V5_TX2:
TX buffer
17 mA