
4-21
33nH
L273
390nH
L281
100pF
C281
240
R245
2.2uF
C276
NU
C272
0.1uF
C273
C286
0.1uF
L271
68nH
Rx_sw
Tx_sw
PRESC
NU
C271
TX_SWITCH
VCC_BUFFERS
VCC_LOGIC
RX_OUT
RX_SWITCH
SUPER_FLTR
TRB_IN
TX_BASE
TX_EMITTER
TX_IADJ
TX_OUT
FLIP_IN
GND_BUFFERS
GND_FLAG
GND_LOGIC
PRESC_OUT
RX_BASE
RX_EMITTER
RX_IADJ
COLL_RFIN
U241
50U54
11 9
17
10
13
8
7
12
2
3
19
16
15
1
4
20
5
6
14
18
1
SHIELD
SH242
1
SH241
SHIELD
VCO TOP SHIELD
VCO BOTTOM SHIELD
R260
1K
C297
.01uF
4
1
3
Q260
2
AUX3
5V
AUX4
1
3
Q261
2
100pF
C289
330
R252
R251
18
100pF
C255
R254
7.5K
1
2
3
3.6pF
L253
RESONATOR
C254
C253
1.5pF
CR251
10pF
C252
C247
100pF
30
R248
0.1uF
C248
7.5K
R253
Tx_sw
100pF
C251
L251
33nH
CR242
L241
CR243
390nH
VCTRL
100pF
C241
2
CR241
1
3
L282
390nH
1
3
2
Q241
BFQ67W
VSF
R244
12K
R243
10K
2.4pF
C245
C244
2pF
Rx_sw
1
7.5pF
C242
7.5pF
C243
C250
7.5pF
220nH
L242
100pF
C246
R241
18
R242
200
L243
RESONATOR
2
3
VSF
C285
100pF
TX_INJ
RX_INJ
4
47K
47K
4.7K
47K
4.7K
47K
10K
10K
DD
5V (Rx)
5.05V (Tx)
5.043V (Rx)
3.218V (Tx)
9.55mV (Rx)
5.058V (Tx)
4.567V (Rx)
4.613V (Tx)
9.59mV (Rx)
4.998V (Tx)
4.639V (Rx)
1.978V (Rx)
3.499V (Rx),4.125V (Tx)@403.355MHz
8.798V (Rx),9.216V (Tx)@469.985MHz
ZMY0130318-B
Figure 4-20. UHF (403-470MHz) Voltage Controlled Oscillator Schematic Diagram