一种电流模式方波/三角波发生器  

A current-mode square/triangular wave generator

作　　者：齐庭庭 杨民生[1] Qi Tingting;Yang Minsheng(College of Computer and Electrical Engineering,Hunan University of Arts and Science,Changde 415000,China)

机构地区：[1]湖南文理学院计算机与电气工程学院

出　　处：《湖南文理学院学报（自然科学版）》2020年第1期39-43,68,共6页Journal of Hunan University of Arts and Science(Science and Technology)

基　　金：湖南省自然科学基金项目(2019JJ40200);湖南文理学院校级科研项目(15YB04)

摘　　要：为解决普通方波/三角波工作频率有限、占空比不能调节等问题,采用多端输出差分电压电流传输器(MO-DVCC)为有源器件提出了一种电流模式方波/三角波产生电路,该电路结构非常简单,仅由1个电流模式施密特触发器、1个电流积分器和1个可调电流源构成,所有器件均接地,非常便于集成实现。该电路的振荡频率能够由接地电容实现独立控制,占空比能够通过外接可调电流源实现电动调节。Pspice仿真结果验证了电路的正确性。In order to solve the problems of limited working frequency and unadjustable duty cycle of ordinary square/triangular wave, a current-mode square/triangular wave generator employing multi-output differential voltage current conveyors(MO-DVCCs) as active blocks is proposed. This circuit simply comprises one current-mode Schmitt trigger, one current integrator and one adjustable current source with all devices being grounded, thus it is convenient to be integrated. The circuit exhibits an independent control of its oscillation frequency free from the signal amplitude using a grounded capacitor and its duty cycle can be adjusted by an adjustable current source. Pspice simulation results confirm the validity of the proposed circuits.

关 键 词：电流模式 方波/三角波发生器 多端输出差分电压电流传输器 

分 类 号：TN713[电子电信—电路与系统]