Barrett 950 - Automatic Antenna Tuner Schematic

940 Automatic Antenna Tuner PCB Schematic Barrett P/N BCA94009
BARRETT 900 SERIES TRANSCEIVERS
PAGE 143
1
2
3
4
5
6
78
A B C
D
8
7
6
5
4
3
2
1
D
C B A
+5
RB6
27
OSC1/CLKIN
9
RB5
26
RB4
25
RB7
28
RB3
24
RB2
23
RB1
22
RB0/INT
21
VSS
8
VSS
19
VDD
20
OSC2/CLKOUT
10
RC7/RX/DT
18
RC5/SD0
16
RC6/TX/CK
17
RC4/SD1/SDA
15
RC3/SCK/SCL
14
RC2/CCP1
13
RC1/T1OSI/CCP2
12
RC0/T1OSO/T1CK1
11
MCLR/VPP
1
RA0/AN0
2
RA1/AN1
3
RA2/AN2
4
RA3/AN3/VREF
5
RA4/TOCKI
6
RA5/SS/AN4
7
U1
PIC16C73
C8
6p
C10
6p
C11
1U
R1
3K3
+5
+5
D1
BAV70
1B
1
2B
2
3B
3
4B
4
5B
5
6B
6
7B
7
GND
8
1C
16
2C
15
3C
14
4C
13
COM
9
5C
12
6C
11
7C
10
U2
ULN2003
1B
1
2B
2
3B
3
4B
4
5B
5
6B
6
7B
7
GND
8
1C
16
2C
15
3C
14
4C
13
COM
9
5C
12
6C
11
7C
10
U3
ULN2003
STR
1
D
2
CLK
3
OE
15
Q1
4
Q2
5
Q3
6
Q4
7
Q5
14
Q6
13
Q7
12
Q8
11
QS
9
QS
10
GND
8
VCC
16
U4
MC4094
STR
1
D
2
CLK
3
OE
15
Q1
4
Q2
5
Q3
6
Q4
7
Q5
14
Q6
13
Q7
12
Q8
11
QS
9
QS
10
GND
8
VCC
16
U5
MC4094
+5 +5
+5 +5
C6
0U1
C7
0U1
L1
0.33uH
C24
10N
C25
10N
L2
0.66uH
L3
1.3uH
RS232 TO PC
C1
22p 500V
R2
47R
L4
2.5uH
L5
5.23uH
L6
10.5uH
L7
21uH
L8
42uH
L9
42uH
C9
10N
R3
10K
T1
TRANS6
D2
HSMP2802
R4
100R 2W
R5
100R 1W
R6
100R 2W
R
S
RL12
EA2-12T
L10
42uH
L11
100u
L13
100u
VDD
VDD
VDD
VDD
VDD
VDD
R
S
RL5
EA2-12T
VDD
R
S
RL4
EA2-12T
VDD
R
S
RL3
EA2-12T
VDD
R
S
RL2
EA2-12T
VDD
R
S
RL1
EA2-12T
VDD
ANT1ANTENNA
VDD
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
C1
RESET
RESET
RESET
RESET
RESET
RESET
RESET
PAD1
C2
47p 500V
C3
100p 500V
R
S
RL13
EA2-12T
R
S
RL14
EA2-12T
VDD
VDD
RESET
C2
RESET
C3
L2
L3
L4
L5
L6
L7
L8
L9
L10
C1
C2
C3
PAD1
Z2
Z1
T2
2:1
R
S
RL15
EA2-12T
R
S
RL16
EA2-12T
VDD
VDD
P2
RF IN
L14
220U
C12
0U1
C13
10P
R8
4K
7
C14
0U1
D3
B
AV99
D4
BAV99
D5
BAV99
C15
0U1
R9
15K
R10
27K
+5
RESET
Z1 Z2
C16
0U1
C27
10U
+5
C28
10U
C17
0U1
R11
10K
Q3
BC847
C18
10P
R12
100K
R13
10K
R14
22K
D6
1
N4004
VCC
C19
0U1
RX
TX
TX
RX
L1
CURRENT
CURRENT
RX
RESET
VCC
WAKE
WAKE
SCAN
SCAN
PHASE
CLK
DATA
T3
1:10
C33
12p
C4
0U1
C5
0U1
R7
47R
R15
47R
R16
47R
D9
HP5802-2800
D10
HP5802-2800
R17
10K
R18
10K
5 4
2
312
U8A
LM339
7 6
1
U8B
LM339
9 8
14
U8C
LM339
C29
0U1
C30
0U1
11 10
13
U8D
LM339
VCC
R20
100K
R21
1
0
0K
C31
10N
PHASE
VCC
CURRENT SENSE
IMPEDANCE MATCHING
-10dB PAD AND PHASE DETECTOR
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16
RP1
33R
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16
RP2
33R
C32
1N
RL17
EA2-12
VDD
VCC
POWER
C34
0U1
POWER
1B
1
2B
2
3B
3
4B
4
5B
5
6B
6
7B
7
GND
8
1C
16
2C
15
3C
14
4C
13
COM
9
5C
12
6C
11
7C
10
U9
ULN2003
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16
RP3
33R
VCC VCC
C35
470U
R22
10K
+5
RESET POWER
C36
10N
VCC
TUNE
1 2 3
P3
CON3
R23
10K
+5
TUNE
940 CONNECTIONS
C37
10N
RESET
RESET
RESET
RESET
RESET
GND
2
IN
8
GND
6
GND
3
OUT
1
GND
7
U7
78L05ACM
X1
20MHz
R
S
RL7
DK1A-L2-12V
R
S
RL8
DK1A-L2-12V
R
S
RL9
DK1A-L2-12V
R
S
RL10
DK1A-L2-12V
R
S
RL11
DK1A-L2-12V
R
S
RL6
DK1A-L2-12V
C20
10U
1 2 3 4
P1
CON4
+5
940 ATU Schematic
Drawing Number: 940D97A3