运放滞回比较电路在差动式温度控制中的应用研究  

Studies on Applications of Hysteresis-Comparators in Differential Control of Temperature

作　　者：顾文照[1] 顾育芸 

机构地区：[1]中国药科大学药学院,解放军通信技术研究所

出　　处：《数据采集与处理》1994年第4期278-284,共7页Journal of Data Acquisition and Processing

摘　　要：从差动式温度控制的角度研究了两种由集成运算放大器构成的滞回比较器（基型和交叉耦合型）的传输特性，发现它们均能用作闭环差动式控温单元，并都具有在温度设置点转换速度快、抗干扰能力强、控制单元设计简单等优点。分析和比较了这两种控温单元的控制参数的调节性能和参数的稳定性，获知后者的预置温度（Ｔｈ或ＴＬ）和差动温度范围（△Ｔ）的设置值均能各自独立地调节，且系统的Ｔｈ，ＴＬ，△Ｔ的实际值几乎仅决定于设置电路本身，因而显得更为优越。文中还讨论了应用中的有关问题，并给出了相关的应用实例。he input-output characteristics for two models of hysteresis comparators (basic and cross-coupled) consisting of operational amplifiers are studied with a view to the differetial control of temperature. The authors find that both of them can be used as control units for closed-loop differetial control systems of temperature with many advantages such as rapid convertion, good immunity of noise and a neat design. The regulation characteristics and steadiness referring to parameters for both are studied and compared. For the latter model (cross-coupled hysteresis-comparator) the preset values of temperature (Th or TL) and differential temperature (△T) can all be regulated individually, and the practical values of Th,TI. and △T for the system depend almost only on the preset circuits, so that the latter is a better one. Some of the questions referring to applications are discussed together with some examples.

关 键 词：滞回比较器 差动式 温度控制 运算放大器 

分 类 号：TN377[电子电信—物理电子学]