Operating instructions

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Line Input Processing Section
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20-Feb-2002 23:31:21
C:\Program Files\Design Explorer 99 SE\rft\t50\t50.Ddb - lineinp.sch
Title
Size: Number:
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Revision:
Sheet of
A3
RF Technology Pty Ltd
Unit 10, 8 Leighton Place
Hornsby, NSW 2077
AustraliaRev. Release Date: Originator:
Rev No. ECO No. Description of Change
LINE_IN1
LINE_IN2
uPHONE_IN
2
3
1
U407A
LM224 5
6
7
U407B
LM224
3
4
1
52
116
A
U402A
LM13700
7
8
VCC
U402C
14
13
16
1215
B
U402B
LM13700
10
9
VCC
U402D
R402
22K
R414
560R
R403
22K
R417
560R
R415
560R
R416
560R
+10V
-10V
+10dBm max input => |Vin| < 3.46V
For peak distortion of 0.3%
max input to transimpedance
amplifier is 100mV => need 25dB attenuation
R406
10K
Io = Is(2Iabc/Id) : Io= Vo/Rl ; Is = Vs/Rs; Iabc = Vabc/Rabc; Id = Vd/Rd
=> Vo/Vs = 2*Rl*Rd*Vabc/(Rs*Rabc*Vd) = Vabc*0.11
NB: Is max (3.46/18) is less than Id/2 (0.5ma)
R407
10K
+10V
R420
120K
R422
120K
GND
GNDGND
LINE2_GAIN
LINE1_GAIN
=> +10dBm peak voltage is transformed to 1.57V(max) to 6.15mV(min) (8 bit DAC, 4V reference)
R400
330R
R401
270R
C401
10nF
GND
GND
R404
56K
9
10 11
U404C
DG411
8
7 6
U404B
DG411
16
15 14
U404D
DG411
1
2 3
U404A
DG411
C423
1uF
C402
3n3F
R425
22K
C425
1uF
C403
3n3F
R426
22K
PRE_EMPH2
PRE_EMPH1
FLAT1
FLAT2
R439
4K7
R440
4K7
GND
GND
R434
4K7
R460
4K7
R428
22K
R429
22K
GND
GND
5
VL
12
V+
13
V-
4
U404E
DG411
GND
+5V +10V
-10V
C407
100nF
16
15 14
U403D
DG411C404
3n3F
EN_uPHONE
R436
4K7
R447
47K
GND
R464
270K
R456
47K
GND
R443
4K7
D402
BAV99
+2.5V
-2.5V
D401
BAV99
R444
4K7
R442
4K7
9
10
8
U407C
LM224
R433
270K
R432
270K
R431
270K
AUDIO_OUT
MOSI
SCLK
LINEINP_DEN
RESET
GND
G
13
RCK
12
Din
14
SRCLR
10
SRCK
11
Q0
15
Q1
1
Q2
2
Q3
3
Q4
4
Q5
5
Q6
6
Q7
7
Dout
9
VCC
16
GND
8
U401
74HC595A
+5V
PRE_EMPH2
FLAT2
PRE_EMPH1
FLAT1
EN_uPHONE
GND
5
VL
12
V+
13
V-
4
U403E
DG411
+10V+5V
GND
-10V
AUDIO_DEV_INC
AUDIO_DEV_U/D
CS
9
SCLK
10
Din
11
AGND
14
DGND
12
VCC
13
Vref
3
CLR
7
LDAC
6
PDE
5
OUTA
2
OUTB
1
OUTC
16
OUTD
15
Dout
8
UPO
4
U406
MAX534
+5V
GND
MOSI
SCLK
RESET
LINEINP_DEN
RESET
SCLK
MOSI
LINEINP_ADSEL
LINEINP_ADSEL
LINE1_GAIN
LINE2_GAIN
LINE_IN2
LINE_IN1
D400
BAV99
1
2 3
U403A
DG411
8
7 6
U403B
DG411
R448
10K
R449
5k6
+2.5V
-2.5V
TEST_DEV
HIGH_GAIN
TEST_DEV
DEV_H_L
5
6
7
U302B
LM224
R412
10K
R454
10K
+5V
LCD_BIAS
LINE_INP
C408
100nF
GND
V+
4
V-
11
U407E
LM224
+10V
-10V
(NPO)
(NPO)
(NPO)
C413
100nF
C414
100nF
C416
100nF
C409
100nF
C410
100nF
C415
100nF
GND
GND
GND
GND
GND GND
C412
100nF
GND
C411
100nF
GND
PWRCNTRL
14
13
12
U407D
LM224
R455
10K
R413
1K
R408
5K6
PWR_CNTRL_RAW
R423
10K
-10V
R424
10K
-10V
C417
100nF
C418
100nF
GND
C419
100nF
GND
C422
100nF
GND
LCD_BIAS_RAW
5
6
7
U405B
LM224
R450
120K
R457
10K
9
10
8
U405C
LM224
R463
120K
R409
120K
GND
2
3
1
U405A
LM224
14
13
12
U405D
LM224
R405
5K6
R458
4K7
R459
4K7
R435
1K
R465
100K
R461
120K
GND
R462
10K
C428
1uF
V+
4
V-
11
U405E
LM224
C426
100nF
C427
100nF
GND
GND
+
C400
33uF
AUDIO_OUT
AUDIO_DEV_INC
AUDIO_DEV_U/D
R410
47K
R411
47K
-10V
-10V
R427
47K
R437
47K
R430
47K
R445
47K
-10V
-10V
-10V
-10V
R438
47K
-10V
R421
22K
R419
22K
9
10
8
U400C
LM224
5
6
7
U400B
LM224
14
13
12
U400D
LM224
V+
4
V-
11
U400E
LM224
+2.5V
+5V
Vref
Q400
MMBT3906
Q401
MMBT3906
C405
100nF
C406
100nF
+10V
-10V
GND
GND
R451
47K
-10V
R453
10K
PWR_CNTRL_HIGH
GND
Q402
MMBT3906
R446
10k
R452
10k
HIGH_GAIN
R418
5k6
DEV_H_L
R466
2K2
PWR_CNTRL_HIGH
PWR_CNTRL_HIGH
R467
4K7
+5D1
D403
BAV99