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參數(shù)資料
| 型號(hào)： | TSH512C |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | HiFi stereo/mono infrared transmitter Stereo sub-carrier generator |
| 中文描述： | 高保真立體聲/單聲道立體聲紅外線發(fā)射器副載波發(fā)生器 |
| 文件頁(yè)數(shù)： | 14/19頁(yè) |
| 文件大?。?/td> | 1281K |
| 代理商： | TSH512C |
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TSH512
14/19
GENERAL DESCRIPTION
The TSH512 is a 0.4 to 11 MHz dual FM analog
transmitter. This circuit offers the functions need-
ed for an advanced infrared STEREO transmitter.
The access pins for each section allow a high ver-
satility and therefore a lot of applications: mono in-
frared transmitter, stereo transmitter, mono/stereo
sub-carrier generator for video transmissions (ie:
popular 2.4GHz video links).
Figure 1 :
TSH512 bloc diagram
Each audio input is amplified with a Low Noise
Amplifier (LNA section) allowing connection to line
level sources or directly to a microphone. Built-in
voltage references ’MIC BIAS’ provide bias for
Electret Condenser Microphones (ECM) with a
high power supply rejection ratio.
Each audio path includes also an Automatic Level
Control (ALC) to limit the overmodulation and the
distorsion on very high signal amplitudes. The fol-
lowing operationnal amplifier (PEA) allows a
preamphasis transfer function before modulating
the varicap diode.
Built-in voltage references (VCO-BIAS) offers a
regulated voltage to bias the varicap diodes. The
Voltage Controlled Oscillator (VCO) is an integrat-
ed oscillator giving typically 600 mV peak to peak
at 2.8 MHz.
The Output Buffer section amplifies linearly the
FM carrier to provide a sinusoidal output. This si-
nusoidal signals reduce the intermodulation prod-
ucts beetween the carriers, specially in two-way or
in multicarrier systems (see the chapter ’ Applica-
tions’).
The Voice Operated Transmit (VOX) function au-
tomatically detects when an audio signal appear
over the background noise.
The stand-by of the second transmitter reduces
consumption in mono operation.
LNA section: Low Noise Amplifier
For each transmitter, the audio source is connect-
ed to the LNA. The LNA stage is a low noise oper-
ationnal amplifier typically usable with a gain from
0dB to 40dB.
Figure 2 :
LNA schematic
The LNA gain is given by:
G
LNA
(dB) = 20.Log(1+R
LNA2
/R
LNA1
)
The High-pass cut-off frequency is:
f
HPF
= 1/(2.
π
R
LNA1
.C
LNA1
)
The Lowpass filter cut-off frequency is:
f
LPF
= 1/(2.
π
R
LNA2
.C
LNA2
)
If you connect an external circuit to the LNA out-
put, the impedance of this external circuit should
be higher than 10 M
and the capacitance lower
than 50 pF in order to keep a good stability.
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1
-
-
-
-
TSH512
Monostable
ALC
ALC
VCO
VCO
buffer
buffer
TX1
TX2
LNA
LNA
VOX
-
PEA
PEA
GND
BUF-IN2
BUF-OUT2
GND
VOX-TIMER
VOX-INTN
VOX-MUTE
VCC
BUF-OUT1
BUF-IN1
GND
DEC2
MIC-BIAS2
GND
VCC
SBY
VOX-INTS
VOX-SENS
VCC
GND
MIC-BIAS1
DEC1
Bias
Bias
Bias
Bias
+
+
+
+
Output
Output
+
V
V
L
L
L
A
P
P
V
V
V
L
L
L
A
P
P
V
V
V
V
V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TSH512CF | HiFi stereo/mono infrared transmitter Stereo sub-carrier generator |
| TSH512CFT | HiFi stereo/mono infrared transmitter Stereo sub-carrier generator |
| TSH691ID | LOW COST 40MHz - 1GHz AMPLIFIER |
| TSH691 | LOW COST 40MHz - 1GHz AMPLIFIER |
| TSH72 | WIDE BAND, LOW POWER OPERATIONAL AMPLIFIER WITH STANDBY FUNCTION |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TSH512CF | 功能描述:音頻 DSP Dual FM Transmitter RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TSH512CFT | 功能描述:音頻發(fā)送器、接收器、收發(fā)器 Hi Fi stereo mono infrared transmitter RoHS:否 制造商:Cirrus Logic 工作電源電壓:3.3 V, 5 V 電源電流:11.8 mA 通道數(shù)量:1 最大工作溫度:+ 70 C 接口類型:I2C, SPI 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-28 封裝: |
| TSH512CYFT | 功能描述:IC IR TRANSMITTER HIFI 44LQFP RoHS:是 類別:RF/IF 和 RFID >> RF 發(fā)射器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- 頻率:310MHz ~ 440MHz 應(yīng)用:- 調(diào)制或協(xié)議:UHF，ASK 數(shù)據(jù)傳輸率 - 最大:20 kBaud 功率 - 輸出:1dBm ~ 5dBm 電流 - 傳輸:10mA 數(shù)據(jù)接口:PCB，表面貼裝 天線連接器:PCB，表面貼裝 存儲(chǔ)容量:- 特點(diǎn):- 電源電壓:2.2 V ~ 4 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-LSSOP（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| TSH60 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Wide-Band, Low-Power Operational Amplifiers with Standby |
| TSH60C | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Wide-Band, Low-Power Operational Amplifiers with Standby |
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