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首頁技術支持技術資料 削波正弦波在電路設計中的應用

削波正弦波在電路設計中的應用

來源:http://www.cecs.net.cn 作者:泰河電子工程 2019年04月02
Utilize Clipped Sine Waveform in Circuit Design
在電路設計中利用削波正弦波形

•Clipped sine waveform is the most popular output option for TCXOs.
•剪切正弦波形是TCXO最常用的輸出選項。
–Low power consumption for improved thermal characteristics - Better aging and frequency stability performance
 - 低功耗,改善熱特性 - 更好的老化和頻率穩定性能
–Better phase noise performance than CMOS output
 - 比CMOS輸出更好的相位噪聲性能

Using Clipped Sine Waveform with Chipset having Input Buffer
使用具有輸入緩沖器的芯片組的限幅正弦波形
 
•To convert the clipped sine waveform to a square waveform signal such as CMOS, an input buffer is necessary.
•要將限幅正弦波形轉換為方形波形信號(如CMOS),需要輸入緩沖區。
•Generally, ICs that TCXO’s output going into would have input buffer functionality integrated inside the chip. Oscillator circuit should have Rf feedback resistor connected in parallel with the inverter.
•通常,TCXO輸出的IC將在芯片內部集成輸入緩沖功能。 振蕩器電路應具有與逆變器并聯的Rf反饋電阻。
•If the IC does not have Rf resistor inside then an Rf resistor would need to be added externally between input pin and output pins of the inverter.
•如果IC內部沒有Rf電阻,則需要在變頻器的輸入引腳和輸出引腳之間添加一個Rf電阻。
•The external Rf resistor value shall be between 100K to 10M ohm.
•外部Rf電阻值應在100K至10M歐姆之間。
•Except for the 7x5mm product lines, a 1000 pF capacitor needs to be placed in series between the TCXO output pin and the IC clock input pin for all the other smaller form-factor TAITIEN TCXOs.
•除7x5mm產品系列外,對于所有其他更小尺寸的TAITIEN TCXO,需要在TCXO輸出引腳和IC時鐘輸入引腳之間串聯一個1000 pF電容。
 
Using Clipped Sine Waveform with Chipset without Input Buffer
 在沒有輸入緩沖器的情況下使用帶有芯片組的削波正弦波形

•If the IC does not have input buffer functionality incorporated, an inverter such as 74HC04 and an Rf resistor would need to be added in series between the output pin of the TCXO and the clock input pin of the IC to convert the clipped sine waveform to a square waveform
•如果IC沒有內置輸入緩沖器功能,則需要在TCXO的輸出引腳和IC的時鐘輸入引腳之間串聯一個74HC04和Rf電阻等反相器,以將限幅正弦波轉換為 方波
•The external Rf resistor value shall be between 100K to 10M ohm.
•外部Rf電阻值應在100K至10M歐姆之間。
•Except for the 7x5mm product lines, a 1000 pF capacitor needs to be placed in series between the TCXO output pin and the IC clock input pin for all the other smaller form-factor TAITIEN TCXOs.
•除7x5mm產品系列外,對于所有其他更小尺寸的TAITIEN TCXO,需要在TCXO輸出引腳和IC時鐘輸入引腳之間串聯一個1000 pF電容。

Using Clipped Sine Waveform in Conjunction with Oscillator IC
 使用削波正弦波與振蕩器IC結合使用

•TAITIEN TCXO with clipped sine wave output can also be used in conjunction with an oscillator IC to generate square wave output for the chip set.
•具有限幅正弦波輸出的TAITIEN TCXO也可與振蕩器IC配合使用,為芯片組生成方波輸出。
•The output from TCXO needs to be connected to the crystal input pin on the oscillator IC and the output pin from the oscillator IC shall be connected to the input pin on the chip set.
•TCXO的輸出需要連接到振蕩器IC上的晶體輸入引腳,振蕩器IC的輸出引腳應連接到芯片組的輸入引腳。
•Except for the 7x5mm product lines, a 1000 pF capacitor needs to be placed in series between the TCXO output pin and the IC clock input pin for all the other smaller form-factor TAITIEN TCXOs.
•除7x5mm產品系列外,對于所有其他更小尺寸的TAITIEN TCXO,需要在TCXO輸出引腳和IC時鐘輸入引腳之間串聯一個1000 pF電容。

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