 技術摘要 / Our Technology： |
本發明係關於一種非線性電流輸出方法及其數位/類比轉換器，特別係指一種利用改變R－2R電晶體梯形轉換器所輸出之電流，以應用於顯示器驅動電路之非線性電流輸出方法及其數位/類比轉換器；該非線性電流輸出方法包括有一初始設定、一調校計算及一偏移調整，進而將一線性的電流波形轉換輸出成一非線性之電流波形；該數位/類比轉換器係將至少一開關、一位移電晶體及一控制電晶體對應連接於一R－2R電晶體梯形電路的節點，並設計適當控制電晶體的通道長寬比，以調整該R－2R電晶體梯形電路之輸出電流的斜率。
The digital-to-analog converter in accordance with the present invention comprises an R-2R transistor-only ladder converter and a digital controller. The controller connects to the R-2R transistor-only ladder converter and comprises at least one regulating transistor and at least one shifting transistor. The at least one regulating transistor has an aspect ratio of kR(W/L). The at least one shifting transistor has an aspect ratio of kS(W/L). Setting the aspect ratios kR(W/L) and kS(W/L) of the shifting and regulating transistors adjusts a linear output current waveform to a non-linear waveform. The method to output a non-linear current comprises acts of determining an optimum non-linear output current, dividing a linear output current into multiple sections, determining slopes of the waveform of the output current, adding a controller corresponding to an R-2R transistor-only ladder converter, setting aspect ratios kR(W/L) of regulating transistors and setting an aspect ratios kS(W/L) of shifting transistors.
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| 專利簡述 / Intellectual Properties： |
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聯繫方式 / Contact： |
| 臺大產學合作總中心 / Center of Industry-Academia Collaboration, NTU |
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| Email：ordiac@ntu.edu.tw |
電話/Tel：02-3366-9945 |
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專利行銷平台