Nokia 2650 - RF Functional Descriptions; RF Block Diagram; Frequency Synthesizers; Vco

Issue 2 06/2005 COMPANY CONFIDENTIAL 35
Copyright © 2005 Nokia. All Rights Reserved.
RH-53/54
8-System Module Nokia Customer Care
RF Functional Descriptions
■ RF block diagram
Block diagrams of direct conversion receiver and transmitter RF section has described in the
following figure.
The architecture is based on Mjoelner, the RF ASIC, which contains most of the functionality of
the RF Engine. The ASIC contains RX and TX functions, VCXO (crystal is placed external to
the ASIC), se the block diagram.
Figure 13:RF block diagram
■ Frequency synthesizers
VCXO
The VCXO is an on-chip oscillator with off-chip crystal with a frequency of 26 MHz.
VCO
The VCO used is a quad band which covers the neaded frequency range for both 900/1800
and 850/1900.
INPL
INML
INPM
INMM
OUTHP
OUTHM
OUTLP
OUTLM
RXQP
RXIP
DET
RBEXT
VB_DET
VANTL
TXC
TXP
V
D
D
R
X
B
B
Mjølner
VTXLOL
VBEXT
VRX
INPH
INMH
TXIP/TXIM
TXQP/TXQM
2
2
RXIM
RXQM
PLFB1
PLFB2
VPCTRL_G
VPLL
VDDCP
VDDPRE
VDDLO
VDDPLL
VREF1
VBB (1.8V)
VTX
2,7k
Vcp
supply
filter
TXC
TXP
SENSE
RESETX
VDDTX
Supply
filter
Ref.
filter
Pinocchio RF block diagram
Version : 0.1
3
RFBUSX
RFBUSDA
RFBUSCLK
Synth
supply
filter
Rx
supply
filter
VR5
VR6
RFCONV_0(9)
VR2
VCOSENSE
VTXBH
VTXBL
VANTM
VTXLOH
SELADDR
Vio: VDDDL, SELADDR
Vr2: VTX, VDDTX, VDDDIG
Vr3: VDDXO, VDDBBB
Vr4: Not used
Vr5: VDDLO, VDDPLL, VDDPRE
Vr6: VDDRXBB, VDDRXF
Vr7: VVCO
VR1A: VDDCP
GENIO6
SAW
VBATTRF
PCN/PCS
GSM
PW-
loop
filter
SAW
VTX
RX900
Balun
SAW
RX1800/
1900
64/65
NDIV
ADIV
ϕ
Charge
Pump
RDIV
1/2
1/4
2
222
1/2
1/4
Open collector
Open collector
LPF1
DCN1
PWC
RF
Controls
RF
Controls
BBAMP
BBAMP
1/2
Buffer
AGC
Lock
Detect
2
2
2
2
LPF2
LPF1
DCN1
AGC
LPF2
V
D
D
R
X
F
Digital Control
BIQUAD
BIQUAD
DCN2
DCN2
LNA
LNA
LNA
Pre-gain
Pre-gain
VDDDIG
Main Bias Circuit
Resistor Ext/R2H/R2
VDDRXBB
Sensor
BIST / Temp.
VDDTX
LNA
Bias
VDDRXBB
Buf/
AGC
VCXO Bias
R2H/R2
AFC/CAL
Control
RESETX
3
VDDRXBB
26MHz
VXO
RF_EN
RF_CLK
RF_DATA
XTALM
XTALP
REFOUT
VDDXO
VDDBBB
INPLO
INMLO
REF CLK SET
VCXO
supply
filter
VR3
VR7
VIO
CPOUT
PLL
loop
filter
REFOUT
RESET_X_M
VANTH
VCO
supply
filter
VIO
VR2
VDDDIG
VDDDL
VBEXT
I/O level
shift
VDDXO
SELADDR
Rpa
18 K : Vendor 1
47 K : Vendor 2
82 K : Vendor 3
Diplexer
RX/TX switch
PA and detector
Ant
GSM RX
PCS RX
TX/RX GSM
TX/RX DCS
Band sel
VTX
PCN/PCS
Vapc
Vsense
ASIC