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1. 发明授权

US08954363B2 Digital-to-analogue converter and neuromorphic circuit using such a converter 有权
标题翻译：使用这种转换器的数模转换器和神经形态电路
公开(公告)号：US08954363B2
公开(公告)日：2015-02-10
申请号：US13705031
申请日：2012-12-04
申请人： Commissariat a l'Energie Atomique et aux Energies Alternatives
发明人： Rodolphe Heliot , Xavier Jehl , Marc Sanquer , Romain Wacquez
IPC分类号： G06N3/04 , H03M1/06 , H03M1/10 , G06N3/02 , H03M1/80 , G06N3/063 , H03M1/74
CPC分类号： G06N3/02 , G06N3/0635 , H03M1/0653 , H03M1/1042 , H03M1/747 , H03M1/80
摘要： A digital-to-analogue converter, with application to electronic circuits with neuromorphic architecture, comprises: transistors of identical nominal geometrical characteristics, but of dispersed current-voltage characteristics, wherein when a constant gate-source voltage is applied to the different transistors, a current varying as a function of the dispersion circulates in the transistor; a digital table receiving a digital word and having a selection output selecting, as a function of the word to be converted, a transistor or transistors supplying a current of desired value representing this word in analogue form. The look-up table is loaded as a function of real measured current-voltage characteristics of different transistors of the set, to establish a look-up between words and current values. The wide variability of characteristics of the transistors, notably their leakage current for a gate-source voltage below the switch-on threshold, allows finding combinations of leakage currents which are a good representation of words to be converted.
摘要翻译：应用于具有神经形态结构的电子电路的数模转换器包括：具有相同标称几何特性但具有分散的电流 - 电压特性的晶体管，其中当恒定的栅极 - 源极电压施加到不同的晶体管时，作为色散的函数的电流随晶体管循环而变化; 接收数字字并且具有选择输出的数字表作为要转换的字的函数，以模拟形式提供表示该字的期望值的电流的晶体管或晶体管。查找表作为集合中不同晶体管的实际测量电流 - 电压特性的函数加载，以建立词和当前值之间的查找。晶体管的特性的广泛变化，特别是其栅极 - 源极电压的低于开启阈值的泄漏电流，允许找到泄漏电流的组合，这是要转换的字的良好表示。

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