Figure 9-179.Vhf (136-174 Mhz) Voltage Controlled Oscillator Schematic Diagram - Motorola HT Series Detailed Service Manual

VHF Circuit Board/Schematic Diagrams and Parts List (PCB 8486062B12)
R5
R5_1_VCO
R3802
100
C3804
0.1uF
R3807
L3801
1K
100nH NU
RX_INJ_1_VCO C3801
RX_INJ
Q3801
4.7pF
C3802
R3801
220
22pF
R3804
NU
NU
R3808
10
C3803
1000pF
SH3801 SH3802
SHIELD SHIELD
R3811
100
C3810
L3811 L3812 C3811 C3812
10pF
100nH 100nH 0.1uF 0.1uF
NU
R3806 10
TX_OUT
C3806
22
8
RX_OUT
12
100pF
PRESC_OUT
C3805 7
RX_SWITCH
10K 4.7pF
13
R3805 TX_SWITCH
24K
R3803
220
C3808
15pF
C3809 L3809
27pF 27nH
TX_INJ_1_VCO
R3816
VSF
1K
TX_INJ
C3816
6.8pF
Vdda VSF
VSF_1_VCO
Vdda_3_VCO
L3813
R3817 1uH
0
C3822
1000pF
C3813
R3818
.01uF
0
NU
R3821
C3818
220
.022uF
18 14
VCC_BUFFERS
1
TX_IADJ
2
RX_IADJ
3
SUPER_FLTR
R3825
4
COLL_RFIN
5
U3801
RX_BASE 33
6
RX_EMITTER
16
TX_BASE
15
TX_EMITTER R3831
20
FLIP_IN
10K
19
TRB_IN
17 11 9
R3832
12K
C3832
1000pF
C3815
1000pF
R3834
R3833
47
220
T5_1_VCO
R3830 R3829
T5 TRB
0 0
TRB_1_VCO
NU
R3835
VSF
47K
PRESC_1_VCO
L3816
PRESC
100nH
C3825
C3830
15pF
68pF
R3822
47
C3824 L3821 L3822 L3823
56pF 56nH 47nH 47nH
C3826
4.7pF
R3826
18
C3823
L3826
.01uF
1uH
BIAS_ADJ_1_VCO
R3812
BIAS_ADJ
100K
NU
C3827
C3821
R3824 R3823
0.22uF
.01uF
33K
22K
C3835
6.8pF
C3836
15pF
C3833 C3834 L3832 L3833
L3831
4.7pF 68nH 56nH
56pF
56nH
VCO_MOD_1_VCO
R3836
VCO_MOD
10K
D3832
Figure 9-179. VHF (136-174 MHz) Voltage Controlled Oscillator Schematic Diagram
9-301
D3821
R3828 VCTRL_1_VCO
L3824
VCTRL
1uH
100
C3828
L3825
.01uF
100nH
C3829
.01uF
L3834 C3842
1uH 1000pF
D3831
ZWG0130020-B