Motorola CP040 - Page 417

UHF3 PCB 8416847H01-A/H02-B Schematic Diagrams 3-27
3.2V to 9.5V
4.5V
RX: 0V
TX: 3V
680
R284
L276
27nH
R277
0
$V
R276
1K
VCO_3V
C251
150pF
8.2K
R281
L272
6.8nH
L291
V_SF
220nH
R254
100
15nH
VCO_PRESC
R282
L292
C276
910
6.8pF
1.3%
NC
C282
4.3pF
2.3%
130
R283
C291
1%
13pF
L271
NU
C267
1.1%
9.1pF
SHIELD
SH253
11
0.1uF
C274
SHIELD
SH250
27nH
L262
0.5pF
20%
C268
V_SF
VCO_RX_INJ
R253
47
4.7K
R280
3.9pF
2.5%
C256
NU
C252
18nH
L281
18nH
L282
27nH
L252
R262
VCO_MOD
7.5K
390pF
VCO_VSF
C284
D261
C272
6.2pF
1.6%
C263
0.1uF
100
R275
R285
R273
330
Q280
BFS540
1
3
2
0
VCO_TRB
D251
VCO_V_STEER
R271
5.1K
C281
C285
390pF
390pF
0.1uF
C292
12.5nH
2%
L254
VCO_TX_INJ
3.9pF
2.5%
C286
C275
390pF
220nH
NC
V_SF
R261
L255
22K
220nH
L251
VCO_5R
6.8pF
1.5%
C290
390pF
C273
C271
.01uF
R272
6.2K
9.1pF
1.1%
C255
R263
33
1
1%
12pF
C257
SHIELD
SH251
C270
390pF
C266
3.0pF
3.3%
L265
220nH
L270
220nH
L264
R264
100
8nH
2%
5.6pF
1.8%
C265
C283
390pF
D262
1SV229
R274
33
81
CIGOL_CCV
6.2pF
1.6%
C253
3
SUPER_FLTR
TRB_IN
19
16
TX_BASE
15
TX_EMITTER
1
TX_IADJ
10
TX_OUT
13
TX_SWITCH
41
SREFFUB_CCV
9
GALF_DNG
CIGOL_DNG
71
12
PRESC_OUT
5
RX_BASE
6
RX_EMITTER
2
RX_IADJ
8
RX_OUT
7
RX_SWITCH
U251
50U54
4
COLL_RFIN
20
FLIP_IN
11
SREFFUB_DNG
C264
L283
2pF
5%
2.2pF
4.5%
C254
NU
TX_INJ
5R
VCO_MOD
PRESC
V_STEER
RX_INJ
V_SF
3V
TRB
UHF3 (465-495MHz) Voltage Controlled Oscillator Schematic PCB No. 8416847H01-A/H02-B