RF Quadrature Transceiver / RF Quadrature Receiver
CMX991/CMX992
2
Block Diagrams
TXIFOUT
TXOUTN
TXOUTP
TXLON
TXLOP
TXIP
TXIN
Divide by
2 or 4
TXQP
TXQN
Select
VDDIO
FREF
DOIF
Limiting VCO Amp
External
Resonator &
Varactors
Integer-N
PLL
DVDD
Control Registers
RESETN
RDATA
VCON
C-BUS
SCLK
CDATA
CSN
DGND
VCCSYNTH
VCOP
Enable
LNA Control
Divide by
4, 2 or 1
Divide by
2 or 4
LNAON
MIXLOP
MIXLON
MIXINP
MIXINN
Divide by
4
Select / Bypass
Power
Supply
VCCIF
VCCRF
sin
VBIAS
AGND
cos
SLI
IAMPO
IFINN
MIXOUT1
MIXOUT2
QAMPP
QAMPN
SLI
RXQN
RXQP
IFP1
IFP2
QAMPO
RXIN
RXIP
IAMPP
Figure 3 CMX991 Block Diagram
VDDIO
FREF
DOIF
Limiting VCO Amp
External
Resonator &
Varactors
Integer-N
PLL
IAMPN
DVDD
Control Registers
C-BUS
RESETN
RDATA
SCLK
CDATA
CSN
DGND
VCCSYNTH
VCON
VCOP
Enable
LNAON
MIXLOP
MIXLON
MIXINP
MIXINN
Divide by
4, 2 or 1
LNA Control
Divide by
4
Select / Bypass
Power
Supply
VCCIF
VCCRF
sin
VBIAS
AGND
cos
SLI
IAMPO
MIXOUT1
IFP1
IFINN
QAMPN
RXIN
RXIP
IAMPP
SLI
RXQN
RXQP
QAMPP
MIXOUT2
Figure 4 CMX992 Block Diagram
2012 CML Microsystems Plc
7
QAMPO
IAMPN
IFP2
D/991_992/18
CMLMICRO [ CML MICROCIRCUITS ]
