具溫度變異補償技術之無參考訊號時脈產生器;A Reference-less Clock Generator with Temperature Variation Compensation

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/74875

Title:	具溫度變異補償技術之無參考訊號時脈產生器;A Reference-less Clock Generator with Temperature Variation Compensation
Authors:	張書豪;Chang, Shu-Hao
Contributors:	電機工程學系
Keywords:	時脈產生器;鎖相迴路;快速鎖定;溫度變異補償
Date:	2017-07-21
Issue Date:	2017-10-27 16:10:08 (UTC+8)
Publisher:	國立中央大學
Abstract:	本論文提出具溫度變異補償技術之無參考訊號時脈產生器，共提出兩個電路架構。第一個為操作頻率為8 MHz之非石英式振盪器，將傳統弛張振盪器的架構進行改良，對於供應電壓以及溫度變異有較佳的抵抗能力，並在脈波產生器對迴路延遲時間做溫度補償。第二個為具多相位輸出，操作頻率為512 MHz及768 MHz之多相位鎖相迴路，其參考訊號源自上述之非石英式振盪器，並在兩個電路之間設計一個溫度補償技術，且加入溫度補償係數之微調電路，確保輸出頻率在不同製程條件下有更高的精準度。本論文之實驗晶片是採用180 nm 1P6M CMOS製程。當溫度範圍在 -40 °C到150 °C，此無參考訊號時脈產生器可達到768 MHz，輸出頻率漂移量為13.2 ppm/ °C。在供應電源變異為 ±10 %的範圍內，量測到的輸出頻率漂移量小於 0.08 %。因此本論文之無參考訊號時脈產生器可取代傳統石英振盪器以提供穩定、可靠及低溫度係數之時脈訊號，達到較小面積和低成本的設計。 ;A reference-less clock generator with temperature variation compensation is presented, which includes two architectures. The first one is an 8 MHz crystal-less oscillator. It provides higher immunities of temperature and supply voltage variations by improving the conventional relaxation oscillator. A proposed pulse generator is used to eliminate the loop delay time caused by temperature variations. The second architecture is a 512 MHz and 768 MHz multi-phase phase-locked loop, and its reference signal is from the former oscillator. Besides, this work provides a temperature variation compensation technique between the two architectures. It also applies a temperature coefficient calibration circuit to ensure the output frequency has a higher accuracy in the process variations. The experimental chip was fabricated by 180 nm 1P6M CMOS process. Under the temperature range from -40 °C to 150 °C, the clock generator output produces a target frequency of 768 MHz and the output frequency drift is 13.2 ppm/°C. Its output frequency drift is less than 0.08 % under the ±10 % supply voltage. A traditional crystal oscillator can be replaced with this clock generator, and it would provide a stable, reliable and low temperature coefficient signal by consuming less area and cost.
Appears in Collections:	[Graduate Institute of Electrical Engineering] Electronic Thesis & Dissertation

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