基于互补型SET的通用阈值逻辑门设计

Design of universal threshold logic gate based on complementary SET

与MOS管相比,单电子晶体管(SET)具有超低功耗、超高集成度等优点,被认为是可能取代MOS管的新一代量子器件的主要竞争者.在简要介绍SET特性及通用阈值逻辑门(UTLG)的基础上,沿用CMOS逻辑电路的设计思想,提出了功能强大的基于互补型SET的三变量UTLG实现方案.利用一个UTLG辅之少量门电路就可实现全部256个三变量逻辑函数.通过实例说明了利用查表设计进行UTLG综合的过程.对所设计的SET电路进行了Pspice仿真,结果表明,基于SET的UTLG以及用UTLG实现的全比较器均具有正确的逻辑功能.

Compared with MOSFET,single electron transistor(SET)has the advantages of ultra-low power consumption and ultra-high integration level,which make it the major candidate for the next generation nano quantum devices.Based on the introduction of SET characteristics and concepts of CMOS logic circuits,a threevariable complementary SET universal threshold logic gate(UTLG)is proposed.All of 256 three-variable logic functions can be realized with a UTLG and only a few logic gates.A full comparator,as an example,is also presented to demonstrate the tabular design procedure of three-variable logic function using a UTLG.The proposed UTLG and SET full comparator are simulated with Pspice and their logic functions are confirmed.