Motorola ATS 3000

9.3-28 UHF2 Schematics, Board Overlays, and Parts Lists
February 14, 2012 6816985H01-F
Figure 9.3-27. PMLE4427B VCO Schematic
R257
0
4.6VSF_VCO4.6VSF_OUT
C257
0.1uF
330pF
C258
L251
390nH
D251
D254 D253
D252
L252
390nH
NU
0
R251
100pF
C295
1
TEST_POINT
TP291
C294
VCTRL
D271
390nH
L270
D270
D272
D273
100pF
C296
L271
390nH
8.9nH
C282
4.3pF
L275
C273
4.7pF
4.3pF
C272
4.3pF
C281
4.3pF
C280
2.0pF
C271
R271
30
R278
12K
R276
10K
L254
390nH
330
R259
R258
7.5
C255
10pF
Tx_SW
11.87nH
L255
C253
2.7pF
C254
2.0pF
11pF
C256
C259
11pF
R252
10K
R253
15K
Rx_SW
0.10uF
C251
100pF
C250
NU
NU
4.6VSF_VCO
R291
30
390nH
L250
R298
R297
0
R296
R299
0
4.6VSF_VCO4.6VSF_VCO
TX_OUT
TX_SWITCH
VCC_BUFFERS
VCC_LOGIC
RX_IADJ RX_OUT
RX_SWITCH
SUPER_FLTR
TRB_IN
TX_BASE
TX_EMITTER
TX_IADJ
COLL_RFIN
FLIP_IN
GND_BUFFERS GND_FLAG
GND_LOGIC
PRESC_OUT
RX_BASE
RX_EMITTER
CD8408DK
VCOBIC
U250
10
13
14 18
28
7
3
19
16
15
1
4
20
11
9
17
12
5
6
Rx_SW
Tx_SW
27nH
L258
2.0pF
C263
C267
1.2pF
100pF
C292
L266
39nH
C293
100pF
1
TP297
TEST_POINT
PRES_IN
NU
1pF
R266
C266
NU
L259
R293
20
330
R294
C262
4.6VSF_VCO
C261
100pF
RX_LO_IN
Q250
C277
22pF
200
R272
L276
22nH
C278
56pF
4.6VSF_VCO
18nH
L274
5.6pF
C276
20
R274
200
R273
200
R275
TP299
TEST_POINT
1
TXRF_OUT
47nH
L273
390nH
R270
120
1K
R255
4.6VSF_OUT
Q251
R254
270K
TRB
10K
R295
330pF
C286
1
TP296
TEST_POINT