Vhf Voltage Controlled Oscillator Schematic Diagram - Motorola HT Series Detailed Service Manual

Circuit Board/Schematic Diagrams and Parts List
R5
R5_1_VCO
R3802
100
C3810
10pF
C3804
0.1uF
L3801 R3807
100nH 1K 1K
NU
RX_INJ_1_VCO
RX_INJ
R3806
C3801
Q3801 22
4.7pF
C3802
R3801
22pF
220
NU NU
R3804 R3805
10K 24K
R3808
10 10
C3803
R3803
1000pF
220
SH3801 SH3802
SHIELD SHIELD
1 1
FMR-2045A-2
Vdda
Vdda_3_VCO
R3811
100
L3811 C3812
L3812 C3811
100nH 0.1uF
100nH 0.1uF
NU
U3801
C3806
10
100pF
TX_OUT
8
RX_OUT
12
PRESC_OUT
C3805 7
RX_SWITCH
4.7pF 13
TX_SWITCH
C3808
15pF
C3809 L3809
27pF 27nH
T5_1_VCO
T5
TX_INJ_1_VCO
PRESC_1_VCO
VSF
L3816
R3816
100nH
TX_INJ
1K
C3816
6.8pF
Figure 8-7. VHF Voltage Controlled Oscillator Schematic Diagram
VSF
VSF_1_VCO
L3813
1uH
R3817
0 0
C3822
C3813
1000pF
R3818 .01uF
0 0
NU
C3818
.022uF
R3821 R3822
220 47
1
TX_IADJ
2
RX_IADJ
3
SUPER_FLTR
4
COLL_RFIN
5
R3826
RX_BASE
R3825
6
18
RX_EMITTER 33
16
TX_BASE
C3823
15
TX_EMITTER
.01uF
20
FLIP_IN
19
TRB_IN
R3831
10K
C3821
R3824
.01uF
22K
R3832
12K
C3832
C3815
1000pF
1000pF
R3834
R3833 47
C3833
220
4.7pF
TRB
R3830 R3829 TRB_1_VCO
0
0
VSF
R3835 R3836
PRESC
VCO_MOD_1_VCO
47K 10K
D3832
D3821
C3830
C3825
68pF
15pF
L3821 L3822 L3823
C3824 L3825
56nH 47nH 47nH
56pF 100nH
C3826
4.7pF
L3826
1uH
BIAS_ADJ_1_VCO
BIAS_ADJ
R3812
100K
NU
C3827
R3823
.022uF
33K
D3831
C3835
6.8pF
C3836
15pF
L3832 L3833
C3834 L3831
68nH 56nH
56pF 56nH
VCO_MOD
83
VCTRL_1_VCO
VCTRL
L3824
R3828
1uH
100
C3828
0.1uF
C3829
0.1uF
L3834 C3842
1uH 1000pF
December 26, 2003