本文選題：數(shù)字溫度補(bǔ)償晶體振蕩器 + 溫度補(bǔ)償電路�。� 參考：《電子技術(shù)應(yīng)用》2017年01期

【摘要】：對(duì)于典型的數(shù)字電路FPGA、微處理器和微控制器等,需要提供精確的時(shí)鐘信號(hào)。振蕩電路產(chǎn)生的時(shí)鐘信號(hào)頻率受到老化、噪聲、溫度等因素影響。在導(dǎo)航、雷達(dá)、無(wú)線電通信和衛(wèi)星通信等領(lǐng)域,需要產(chǎn)生對(duì)溫度不敏感的時(shí)鐘信號(hào)。介紹了一種針對(duì)RTC應(yīng)用的溫度控制振蕩器的補(bǔ)償電路,通過(guò)測(cè)溫電路和逐次逼近模數(shù)轉(zhuǎn)換器SAR ADC檢測(cè)實(shí)時(shí)溫度,結(jié)合EEPROM中對(duì)音叉晶體特性的測(cè)試結(jié)果,調(diào)整振蕩電路的負(fù)載電容大小,可以使振蕩器在-40℃~+85℃溫度范圍內(nèi)的頻率變化僅為5×10~(-6)。
[Abstract]:For typical digital circuits, such as FPGA, microprocessors and microcontrollers, precise clock signals are required. The frequency of clock signal produced by oscillating circuit is affected by aging, noise, temperature and so on. In areas such as navigation, radar, radio and satellite communications, temperature-insensitive clock signals need to be generated. This paper introduces a compensation circuit of temperature controlled oscillator for RTC application. It detects the real time temperature by temperature measuring circuit and successive approximation A / D converter SAR ADC, and combines the test results of tuning fork crystal characteristics in EEPROM. By adjusting the load capacitance of the oscillating circuit, the frequency variation of the oscillator in the temperature range of -40 鈩，

本文編號(hào)：2080951