Vhf Voltage Controlled Oscillator Schematic Diagram - Motorola GP88s Service Manual

-30
9B
R5
R5_1_VCO
R3802
100 R:4.6V
T: 0V
C3804
0.1uF
R3807
L3801 NU
C3801 100nH
RX_INJ_1_VCO
4.7pF
RX_INJ
Q3801
R3801
C3802
NU
NU
R3804
R3808
10K
10
R:0.9V
T: 0V
R3803
C3803
220
1000pF
RF mV RMS measured with high impedance probe.
SH3801 SH3802
SHIELD SHIELD SHIELD SHIELD
1 1

VHF Voltage Controlled Oscillator Schematic Diagram

Vdda_3_VCO
R:4V
T: 2.8V
R3811
100
C3810 L3811 L3812
C3811
C3812
NU 100nH
100nH 0.1uF 0.1uF
800mV
RMS
R3806 C3806
10
TX_OUT
22 100pF
8
RX_OUT
12
PRESC_OUT
C3805 7
RX_SWITCH
4.7pF
13
R3805
TX_SWITCH
24K
C3808
15pF
C3809 L3809
500mV
27pF 27nH
RMS
T5
TX_INJ_1_VCO
3.1V
R3816
1K
VSF
L3816
TX_INJ
100nH
C3816
6.8pF
Vdda VSF
VSF_1_VCO
3.3V
4.55V
L3813
1uH
R3817
0
C3822
1000pF
C3813
R3818
.01uF
NU
C3818
.022uF
R3821
220
18 14
1
TX_IADJ
2
RX_IADJ
R3825
3
SUPER_FLTR
33
4
COLL_RFIN
RX_BASE 5
U3801
6
50U54
RX_EMITTER
16 C3823
TX_BASE
R3831
15 .01uF
10K
TX_EMITTER
20
FLIP_IN
19
TRB_IN
11 9
17
C3821
.01uF
R3832
12K
C3832
1000pF
C3815 T: 250mV RMS
R3834
1000pF
47
R:0V
T: 3.1V
R3833
C3833
T5_1_VCO
220
4.7pF
TRB
R3830 R3829
TRB_1_VCO
NU
0
R3835 R3836
47K
PRESC_1_VCO
VSF
PRESC
D3832
R: 1V RMS
R: 250mV RMS
C3830
C3825
R3822
68pF
15pF
47
C3824 L3821 L3822 L3823
56nH
56pF 47nH 47nH
C3826
4.7pF
R3826
18
L3826
R:1.7V
1uH
T: 0V
BIAS_ADJ_1_VCO
BIAS_ADJ
R3812
NU
C3827
R3823
R3824
33K 0.22uF
22K
C3835
6.8pF
T: 1V RMS
C3836
15pF
L3832 L3833
C3834
L3831
56pF 68nH 56nH
56nH
10K
VCO_MOD
VCO_MOD_1_VCO
ZMY0130406-A
Circuit Board/Schematic Diagrams and Parts List
R, T: 3.5V-9.5V
@ 135MHz-174MHz
D3821
R3828
L3824
VCTRL_1_VCO
1uH 100
VCTRL
C3828
L3825
.01uF
100nH
C3829
.01uF
L3834 C3842
1000pF
1uH
D3831