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