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參數資料
| 型號： | TSH512CF |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 封裝： | 10 X 10 MM, ROHS COMPLIANT, TQFP-44 |
| 文件頁數： | 14/31頁 |
| 文件大小： | 1350K |
| 代理商： | TSH512CF |
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TSH512
General description
Doc ID 8120 Rev 7
21/31
5.4
ALC section: automatic level control
Both transmitters of the TSH512 include an automatic level control (ALC). When the level of
the audio signal is too high, the ALC compresses the signal in order to avoid over-
modulation of the FM VCO. In this way, the ALC reduces the distortion and maintains a
reduced transmit spectrum with very high amplitude signals.
Figure 28.
Automatic level control schematics
The ALC features a 20 dB gain and an output signal regulated to 700 mVpp in compression.
The attack time is the response time of the ALC to go from the linear amplification to the
compression region. The attack time mainly depends on the capacitor value of CALC.
page 15).
The decay time is the response time the ALC requires to recover to full gain amplifying
mode after being in compression mode. The decay time depends mainly on the RALC
5.5
VOX description: voice operated transmit
The voice operated transmit (VOX) section reduces consumption when there is no audio
signal to transmit. When the VOX detects that no audio signal is present, it mutes the output
buffers of TX1 and TX2 and provides the logic signal VOX-MUTE to switch-off the external
LED drivers if needed.
The audio signal of TX1 is amplified with a gain dependent on the values of Rsens and Csens.
Rsens and Csens are connected to pin 7. The high-pass filtering has the following cut-off
frequency:
f
HPF
1
2
π R
sens
C
sens
()
--------------------------------------------------
=
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TSH512CFT | 功能描述:音頻發送器、接收器、收發器 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 通道數量:1 最大工作溫度:+ 70 C 接口類型:I2C, SPI 安裝風格: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 發射器 系列:- 標準包裝:4,000 系列:- 頻率:310MHz ~ 440MHz 應用:- 調制或協議:UHF，ASK 數據傳輸率 - 最大:20 kBaud 功率 - 輸出:1dBm ~ 5dBm 電流 - 傳輸:10mA 數據接口:PCB，表面貼裝 天線連接器:PCB，表面貼裝 存儲容量:- 特點:- 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 |
| TSH60CD | 功能描述:運算放大器 - 運放 Lo Pwr Oper Amp Wide Band RoHS:否 制造商:STMicroelectronics 通道數量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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