TA2149BNG [TOSHIBA]
IC AM/FM, AUDIO SINGLE CHIP RECEIVER, PDIP24, 0.300 INCH, 1.78 MM PITCH, PLASTIC, SDIP-24, Receiver IC;
| 型号： | TA2149BNG |
| 厂家： | 
TOSHIBA |
| 描述： | IC AM/FM, AUDIO SINGLE CHIP RECEIVER, PDIP24, 0.300 INCH, 1.78 MM PITCH, PLASTIC, SDIP-24, Receiver IC ISM频段 光电二极管 商用集成电路 |
| 文件： | 总15页 (文件大小：242K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TA2149BNG/BFNG
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA2149BNG,TA2149BFNG
3 V AM/FM 1 Chip Tuner IC (for Digital Tuning System)
TA2149BNG, TA2149BFNG are AM/FM 1 chip tuner ICs,
which are designed for portable Radios and 3 V Head phone
TA2149BNG
Radios.
This is suitable for Digital Tuning System Applications. FM
Local Oscillation Voltage is set up low relativity, for NEW FCC.
Functions
•
•
For NEW FCC.
Suitable for combination with Digital Tuning System which is
included IF Counter.
TA2149BFNG
•
Adjustable for IF count output sensitivity by external
resistance of pin 17 (FM only).
•
One terminal type AM/FM IF count output for IF counter of
Digital Tuning System.
•
•
FM: 1.3375 MHz (1/8 dividing)
AM: 450 kHz
•
•
Built-in Mute Circuit for IF count output.
For adopting ceramic Discriminator, it is not necessary to
adjust the FM Quad Detector Circuit.
Weight
SDIP24-P-300-1.78: 1.2 g (Typ.)
SSOP24-P-300-0.65A: 0.14 g (Typ.)
•
•
Built-in FM MPX VCO circuit.
Built-in one terminal type AM/FM Local Oscillator Buffer
Output for Digital Tuning System Applications.
•
Built-in 1/16 Pre-scaler for FM Local OSC Buffer.
Built-in AM Low cut circuit.
Low supply current. (V = 3 V, Ta = 25°C)
•
•
CC
I
I
(FM) = 13 mA (Typ.)
(AM) = 8.5 mA (Typ.)
CCq
CCq
•
Operating Supply voltage range: V
= 1.8~7 V (Ta = 25°C)
CC
Note 1: Handle with care to prevent devices from deteriorations by static electricity.
1
2006-04-11
TA2149BNG/BFNG
Block Diagram
H: MONO
L: ST
H: AM
L: FM
V
T
OSC BUFF OUT
PSC SW
V
CC
IF OUT
: 1/16
IF REQ
OPEN: 1/1
V
CC
FM
RFout
RF
AM
FM
OSC
21
AM
OSC
OUT
19
ST
IF
REQ
17
DET
OUT
16
MPX
IN
15
V
RFin
22
OSC
20
LED
18
LPF1
14
LPF2
13
CC
24
23
IF
REQ
AM
OSC
AF
AF
BUFF
FM
ST
SW
OSC
VCO
DIVIDE
BUFF
BUFF
DECODE
1/1 or
1/16
IF
BUFF
LEVEL
DET
1/8
AM
DET
FM
DET
SM/MO
FM/AM
AM
MIX
FM
MIX
AGC
FMRF
AMIF
FMIF
MUTE
1
RF
GND
2
FM
RFin
3
4
MIX
OUT
5
V
6
AM IF
IN
7
FM IF
IN
8
GND
9
AGC
10
QUAD
11
12
FM
ANTENNA
AM
LOW
CUT
R-OUT L-OUT
CC
BFP
R-OUT L-OUT
2
2006-04-11
TA2149BNG/BFNG
Explanation of Terminals
(Terminal Voltage: Typical terminal voltage at no signal with test circuit,
= 3 V, Ta = 25°C)
V
CC
Terminal Voltage
(Typ.) (V)
PIN
No.
Characteristic
Internal Circuit
AM
0
FM
0
RF GND
(GND for FM RF stage)
1
2
⎯
24
FM-RFin
0
0.8
2
RF GND 1
22 kΩ
22 kΩ
AM
DET
3
AM LOW CUT
1.0
⎯
3
GND 8
V
CC
5
4
FM
MIX
4
MIX OUT
3.0
3.0
AM
MIX
RF GND 1
8 GND
V
(V
CC
CC
5
6
⎯
3.0
2.3
3.0
2.5
for AM, FM IF, MPX)
6
AM IF IN
GND 8
3
2006-04-11
TA2149BNG/BFNG
Terminal Voltage
(Typ.) (V)
PIN
No.
Characteristic
Internal Circuit
AM
FM
V
CC
5
7
7
FM IF IN
3.0
3.0
GND 8
GND
8
9
⎯
0
0
0
0
(GND for AM, FM IF, MPX)
V
CC
5
9
AGC
GND 8
10
V
CC
5
10 QUAD
2.5
2.2
GND 8
V
CC
5
11 R-OUT
12 L-OUT
1.2
1.2
11/12
GND 8
4
2006-04-11
TA2149BNG/BFNG
Terminal Voltage
(Typ.) (V)
PIN
No.
Characteristic
Internal Circuit
AM
FM
13
AM/FM
SW
LPF2
• LPF terminal for phase
detector
13 • Bias terminal AM/FM SW
0
2.2
circuit
V
13
V
13
= GND → AM
= OPEN → FM
8
GND
14
DC
AMP
LPF1
• LPF terminal for
synchronous detector
• VCO stop terminal
14
STOP
14
0.7
2.4
V
= GND → VCO
8
GND
55 kΩ
15
15 MPX IN
0.7
0.7
GND 8
V
CC
5
AM
FM
16
16 DET OUT
1.0
0.9
750 Ω
a
8
b
GND
a
b
LOW → FM, HIGH → AM
LOW → AM, HIGH → FM
5
2006-04-11
TA2149BNG/BFNG
Terminal Voltage
(Typ.) (V)
PIN
No.
Characteristic
Internal Circuit
AM
FM
5
V
CC
17 IF REQ
⎯
⎯
17
19 kHz
18
18 ST LED
⎯
⎯
GND 8
RF V
23
CC
19 OSC OUT
2.8
2.7
19
PSC
SW
RF-GND 2
20
V
CC
5
20 AM OSC
3.0
3.0
GND 8
21
RF V
23
CC
21 FM OSC
3.0
3.0
GND 1
6
2006-04-11
TA2149BNG/BFNG
Terminal Voltage
(Typ.) (V)
PIN
No.
Characteristic
Internal Circuit
AM
FM
V
CC
5
AGC
22
22 AM RFin
3.0
3.0
GND 8
RF V
CC
23
⎯
3.0
3.0
3.0
3.0
(V
CC
for FM RF stage)
24 FM RFout
cf. pin 1
7
2006-04-11
TA2149BNG/BFNG
Application Note
1. AM Low-Cut Circuit
22 kΩ
•
The AM Low-Cut action is carried out by the bypass of the high frequency
component of the positive-feedback signal at the AF AMP stage.
22 kΩ
The external capacitor: C by-pass this component.
3
3
•
The cut-off frequency fL is determined by the internal resistance
R
22 kΩ (Typ.) and the external capacitor C as following;
3
C
3
1
=
(Hz)
f
L
3
2× π ×22×
×
C
3
10
•
•
In the case of the AM Low-Cut function is not needed, set up the value of C over 1 µF.
3
>
In the condition of C
1 µF, the frequency characteristic has flat response at the low frequency.
3
It is possible to reduce the recovered output level at AM mode, by additional resistance between the pin 3
and GND line.
2. FM Detection Circuit
For the FM detection circuit, detection coil is able to use instead of ceramic discriminator.
Recommended circuit and recommended coil are as follows. (In this case, please take care that V (lim.)
in
falls a little.)
V
CC
V
CC
3
2
4
6
1
10
Pin 10
Turns
Test
Frequency
Co
(pF)
Wire
(mmφ)
Qo
45
Reference
1-2
2-3
1-3
30
4-6
Toko Co., Ltd.
600BEAS-10018Z
10.7 MHz
51
⎯
⎯
⎯
0.08UEW
3. FM/AM switch and forced monaural switch.
•
•
FM/AM switchover and stereo/forced monaural switchover are done by pin 13 and pin 14.
FM/AM switch (pin 13)
V13: Low (Active Low, V = 0.2 V (Typ.), I 30 µA (Typ.)→ AM
th th
V13: OPEN
Stereo/forced monaural switch (pin 14)
V14: Low (Active Low, V = 0.2 V (Typ.), I 30 µA (Typ.)→ Forced Monaural
→ FM
•
th th
V14: OPEN
→ Stereo
V
V
CE (sat)
CE (sat)
V
CC
14
13
8
2006-04-11
TA2149BNG/BFNG
4. V Line
CC
This ICs have two voltage supply terminals, V
stage). Set up the potential difference between V
case that this IC doesn’t operate normally.
(for AM, FM IF, MPX stage) and RF V
(for FM RF
CC
CC
0.4 V (typ.) or less, otherwise there is the
and RF V
CC
CC
5. How to control the Divider of FM OSC.
RF V
CC
R
AM
buff
SW8
OSC
buff out
19
1/1
or
1/16
FM
OSC
buff
Divider of FM OSC ON/OFF switching is controlled by external pull-up resistor of pin 19.
In case of Divider of FM OSC is used, it is necessary to set up the value of R under 470 Ω (typ.).
When R is over 470 Ω, it is feared that Divider is not operating. (At this time, buffer output frequency is
equal to FM OSC frequency.)
Which ever Divider of FM OSC is used or not, AM OSC buffer frequency and output level is same.
Mode
FM
SW8
Output Frequency
Output Level (Typ.)
OPEN
ON
1/1 FM OSC
35 mVrms
1/16 FM OSC
110 mVrms
OPNE
ON
AM
1/1 FM OSC
75 mVrms
6. How to adjust the IF Count Output Sensitivity
IF count output sensitivity can be adjusted by changing the value of external resistance at pin 17.
This ICs have IF signal level detector in pin 9. When DC voltage of pin 9 is high than threshold, IF count
output signal come out from the pin 17.
And this threshold is controlled by value of external resistance at pin 19.
65
60
55
50
45
40
350
300
250
200
150
100
50
V
(FM)
IF
IF sens (FM)
V
CC
= 3 V
35 f = 10.7 MHz
∆f = 75 MHz
30
0
0
3.5
0.5
1
1.5
2
2.5
3
External resistance of pin-17 (kΩ)
9
2006-04-11
TA2149BNG/BFNG
Absolute Maximum Ratings (Ta = 25°C)
Characteristics
Supply voltage
Symbol
Rating
Unit
V
8
10
V
mA
V
CC
LED current
LED voltage
ILED
VLED
8
TA2149BNG
1200
500
P
D
Power dissipation
mW
(Note 2)
TA2149BFNG
Operating temperature
Storage temperature
T
−25~75
−55~150
°C
°C
opr
T
stg
Note 2: Derated above Ta = 25°C in the proportion of 9.6 mW/°C for TA2149BNG of 4 mW/°C for TA2149BFNG.
Electrical Characteristics
=
=
(Unless otherwise specified, Ta 25°C, VCC 3 V,
F/E: f = 98 MHz, fm = 1 kHz
FM IF: f = 10.7 MHz, ∆f = ±75 kHz, fm = 1 kHz
AM: f = 1 MHz, MOD = 30%, fm = 1 kHz
MPX: fm = 1 kHz)
Test
Circuit
Characteristic
Supply current
Symbol
Test Condition
= 0, FM mode
Min
Typ.
Max
Unit
mA
I
⎯
V
V
V
⎯
⎯
13
16.5
11.0
CC (FM)
in
in
in
I
⎯
= 0, AM mode
8.5
CC (AM)
= 60dBµV EMF,
−3dB limiting
Input limiting voltage
V
⎯
⎯
⎯
⎯
⎯
23
75
37
10
35
⎯
⎯
⎯
47
dBµV EMF
mVrms
in (lim)
Local OSC buffer output
voltage 1
V
OSC
(buff) FM1
F/E
f
= 108.7 MHz
OSC
Local OSC buffer output
voltage 2
V
f
= 6.79375 MHz
OSC
OSC
110
42
mVrms
(buff) FM2
SW8: ON
V
= 80dBµV EMF,
−3dB limiting
in
Input limiting voltage
V
dBµV EMF
in (lim) IF
Recovered output voltage
Signal to noise ratio
V
⎯
⎯
⎯
⎯
⎯
⎯
V
V
V
V
V
V
= 80dBµV EMF
= 80dBµV EMF
= 80dBµV EMF
= 80dBµV EMF
200
⎯
250
75
300
⎯
mVrms
dB
OD
in
in
in
in
in
in
S/N
THD
AMR
Total harmonic distortion
FM IF
⎯
0.3
60
⎯
%
AM rejection ration
⎯
⎯
dB
IF count output frequency
IF count output voltage
f
(FM)
= 80dBµV EMF, SW7: ON 1.3373 1.3375 1.3377
MHz
IF
V
(FM)
= 80dBµV EMF, SW7: ON
250
42
290
47
330
52
mV
p-p
IF
IF sens
(FM)
IF count output sensitivity
⎯
SW7: ON
dBµV EMF
Gain
G
⎯
⎯
⎯
⎯
V
V
V
V
= 27dBµV EMF
= 60dBµV EMF
= 60dBµV EMF
= 60dBµV EMF
20
60
⎯
⎯
38
85
41
0.7
70
108
⎯
mVrms
mVrms
dB
V
in
in
in
in
Recovered output voltage
Signal to noise ratio
Total harmonic distortion
V
OD
S/N
THD
⎯
%
AM
Local OSC buffer output
voltage
V
OSC
(buff) AM
⎯
⎯
⎯
f
= 1.45 MHz
55
75
290
38
⎯
350
43
mVrms
OSC
IF count output voltage
V
(AM)
V
= 60dBµV EMF、SW7: ON 250
mV
p-p
IF
in
IF sens
(AM)
IF count output sensitivity
Pin 17 output resistance
SW7: ON
33
dBµV EMF
kΩ
⎯
⎯
FM mode
AM mode
⎯
⎯
0.75
15.5
⎯
⎯
R
17
10
2006-04-11
TA2149BNG/BFNG
Test
Circuit
Characteristic
Symbol
Test Condition
Min
Typ.
Max
Unit
Input resistance
R
⎯
⎯
⎯
⎯
⎯
⎯
55
5
⎯
⎯
kΩ
kΩ
IN
Output resistance
R
OUT
L + R = 90%, P = 10%,
Max. composite signal input
voltage
V
in MAX
(Stereo)
⎯
SW3: LPF ON
⎯
700
⎯
mVrms
f
m
= 1 kHz, THD = 3%
f
m
f
m
f
m
= 100 Hz
= 1 kHz
⎯
35
⎯
45
45
45
⎯
⎯
⎯
L + R =
180 mVrms,
P = 20 mVrms
SW3: LPF ON
Separation
Sep.
⎯
dB
= 10 kHz
THD
(Monaural)
Monaural
⎯
⎯
V
= 200 mVrms
⎯
⎯
0.3
0.3
⎯
⎯
in
Total harmonic
distortion
%
MPX
THD
(Stereo)
L+R = 180 mVrms,
P = 20 mVrms, SW3: LPF ON
Stereo
Voltage gain
G
⎯
⎯
⎯
⎯
V
V
= 200 mVrms
= 200 mVrms
−2.7
−1.5
⎯
−1.2
0
0.2
1.5
14
dB
dB
V
in
in
Channel balance
C.B.
ON
V
10
8
L (ON)
Stereo LED
sensitivity
Pilot input (19 kHz)
mVrms
mVrms
OFF
V
5
⎯
L (OFF)
To LED turn off from LED turn
on
Stereo LED hysteresis
V
H
⎯
⎯
2
⎯
Capture range
C.R.
S/N
⎯
⎯
⎯
P = 15 mVrms
⎯
⎯
⎯
±8
80
80
⎯
⎯
⎯
%
dB
dB
Signal noise ratio
V
V
= 200 mVrms
= 200 mVrms
in
in
Muting attenuation
MUTE
Coil Data
Turns
L
(µH)
Co
(pF)
Wire
(mmφ)
Coil No.
FM RF
Test Freq.
Qo
Reference
1-2
2-3
1-3
1-4
4-6
1
2
Toko Co., Ltd.
666SNF-305NK
L
L
100 MHｚ
⎯
⎯
⎯
79
76
65
60
⎯
⎯
⎯
⎯
0.16UEW
0.16UEW
0.05UEW
0.05UEW
1
2
Toko Co., Ltd.
666SNF-306NK
FM OSC 100 MHｚ
AM OSC 796 kHｚ
⎯
⎯
19
⎯
⎯
95
⎯
2
⎯
⎯
⎯
⎯
⎯
7
2
Toko Co., Ltd.
5PNR-5146Y
T
268
⎯
⎯
⎯
1
2
Toko Co., Ltd.
5PLG-5147X
T
AM IFT
455 kHｚ
470
109
L : FM RF
1
L : FM OSC
2
T : AM OSC
1
T : AM IFT
2
Pin 20
FM C.F.
AM C.F.
4
4
3
2
3
2
3
1
3
1
6
6
1
1
V
Pin
4
V
CC
CC
11
2006-04-11
TA2149BNG/BFNG
Test Circuit
5 V
2.4 kΩ
V
= 8 V
DD
DET OUT
AM-RF IN
2 kΩ
OSC OUT
0.022 µF
10 µF MPX IN
IF OUT
V
T
Vin
V
CC
SW
8
T
1
L
1
L
2
SW
7
SW
4
SW
5
24
23
22
21
20
19
18
17
16
15
14
LPF1
13
LPF2
FM RFout RF V
AM RFin FM OSC AM OSC
OSC ST LED IF REQ DET OUT MPX IN
OUT
CC
TA2149BNG/BFNG
RF
GND
1
AM LOW
CUT
FM RFin
2
MIX OUT
4
V
AM IF IN FM IF IN GND
AGC
9
QUAD R-OUT L-OUT
10 11 12
CC
5
3
6
7
8
SW
2
0.033 µF
CF
1
CR
T
2
CF
2
SW
3
330 Ω
LPF
BPF
SW
1
FM-RF IN
Vin
FM-IF IN 270 Ω
BPF : GFWB3 (Soshin Electric Co., Ltd.)
CF : SFU450B (Murata Co., Ltd.)
Vin
1
CF : SFE10.7MA5 (Murata Co., Ltd.)
2
CR : CDALA10M7GA100A-B0 (Murata Co., Ltd.)
12
2006-04-11
TA2149BNG/BFNG
Package Dimensions
Weight: 1.2 g (typ.)
13
2006-04-11
TA2149BNG/BFNG
Package Dimensions
Weight: 0.14 g (typ.)
14
2006-04-11
TA2149BNG/BFNG
RESTRICTIONS ON PRODUCT USE
060116EBA
• The information contained herein is subject to change without notice. 021023_D
• TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor
devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of
such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability
Handbook” etc. 021023_A
• The TOSHIBA products listed in this document are intended for usage in general electronics applications
(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or
spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,
medical instruments, all types of safety devices, etc. Unintended Usage of TOSHIBA products listed in this
document shall be made at the customer’s own risk. 021023_B
• The products described in this document shall not be used or embedded to any downstream products of which
manufacture, use and/or sale are prohibited under any applicable laws and regulations. 060106_Q
• The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which
may result from its use. No license is granted by implication or otherwise under any patent or patent rights of
TOSHIBA or others. 021023_C
• The products described in this document are subject to the foreign exchange and foreign trade laws. 021023_E
About solderability, following conditions were confirmed
• Solderability
(1) Use of Sn-37Pb solder Bath
· solder bath temperature = 230°C
· dipping time = 5 seconds
· the number of times = once
· use of R-type flux
(2) Use of Sn-3.0Ag-0.5Cu solder Bath
· solder bath temperature = 245°C
· dipping time = 5 seconds
· the number of times = once
· use of R-type flux
15
2006-04-11
相关型号：
TA2149N
IC AUDIO SINGLE CHIP RECEIVER, PDIP24, 0.300 INCH, 1.78 MM PITCH, PLASTIC, SDIP-24, Receiver ICWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOSHIBA
TA2150FN
IC SPECIALTY CONSUMER CIRCUIT, PDSO30, 0.300 INCH, 0.65 MM PITCH, PLASTIC, SSOP-30, Consumer IC:OtherWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOSHIBA
TA2151FN
RF Amplifier for Digital Servo CD SystemWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOSHIBA
TA2152FL
IC 0.008 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC24, 5 X 5 MM, 0.50 MM PITCH, PLASTIC, QON-24, Audio/Video AmplifierWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOSHIBA
TA2152FLG
Low Current Consumption Headphone Amplifier (for 1.5-V/3-V Use)Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOSHIBA
TA2152FN
IC 0.008 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24, 0.300 INCH, 0.65 MM PITCH, PLASTIC, SSOP-24, Audio/Video AmplifierWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOSHIBA
TA2152FNG
Low Current Consumption Headphone Amplifier (for 1.5-V/3-V Use)Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOSHIBA
TA2153FN
RF Amplifier for Digital Servo CD SystemWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOSHIBA
TA2154A
SAW Filter 1588.655 MHz (BW 34.47Hz) SMD 1.1x0.9x0.5mmWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TAI-SAW
TA2154AFN
1.5 V 1 Chip Tuner IC (for Digital Tuning System)Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOSHIBA
TA2154AFNG
IC AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO30, 0.300 INCH, 0.65 PITCH, PLASTIC, SSOP-30, Receiver ICWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOSHIBA
TA2155A
SAW Filter 872 MHzWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TAI-SAW
©2020 ICPDF网 联系我们和版权申明