30-70 KHZ ULTRA LOW POWER CMOS TRANSCEIVER
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9hhÃTurr
Cvdd Vdd
wupe n Level TEST SUPTEST V DDA V D D
100nF
V S S VSSA
Peak Dete...
Description
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Y@
!(8HPT
9hhÃTurr
Cvdd Vdd
wupe n Level TEST SUPTEST V DDA V D D
100nF
V S S VSSA
Peak Detector
270pF 68mH 2.2nF
270pF
INA
Sine Filter @2 fc
LowPass Filter @ fc
I
Limiter
I Demodulator DA TA
to uC
68mH
150k
INB
Preampl +i Anti-Alias Filter Sine Filter @2 fc clk
+ to uC
D C L K
Bit synchronizer
LowPass Filter @ fc Q Limiter Q
47nF Vdd Cvref 30uH 100nF 280k Riref
V REF
Current Ref. VoltageGen.
rxen 0 9 0 Sequencer#2 (/ 8) Nx32.7K
w upe n
IREF
power management
Sequencer#1 (/ 2)
Nselect ext_osc en32Kout Pow er Management &3wire interface D E S C S D
to uC
Phase/ Frequency Detector
Loop Filter
V C O
PrgmDivider N=18 or22
Quartz Oscill32 K
On/Off R E
PA OUT VSSPA
P rgm Power Amplifier
M S B 1 2
Phase Accum.
QIN
QOUT
Xtal
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