振荡电路输入端选取及选频网络反馈性质的讨论  

Study on the Selection of Input Terminerls of the Sinusoidal Oscillator and Feedback Characteristics of Frequency-Selective Network

作　　者：张靖华[1] 

机构地区：[1]上海大学机电工程与自动化学院自动化系,上海200072

出　　处：《电气电子教学学报》2004年第1期27-29,共3页Journal of Electrical and Electronic Education

摘　　要：在分析正弦波振荡电路时 ,电路中正反馈网络的反馈性质不因振荡电路输入端的选取不同而改变 ,因此并不影响电路能否产生正弦波振荡的判断。改变输入端的选取也不影响确定正弦波振荡电路产生持续振荡所需满足的条件。另外对选频网络在振荡电路中反馈的性质与其幅频响应的关系等问题也进行了讨论 ,并作了计算机模拟。The positive feedback characteristic of the positive feedback network of the sinusoidal oscillator is unchanged by the difference in selection of oscillators input terminals for analyzing the sinusoidal oscillator, therefore judgement of the possibility of oscillation starting is not affected. It is also not to affect determining the condition for keeping stabilized oscillation by changing the selection of input terminals. The relaitionship between positive or negative feedback characteristics of the frequency selective network and its amplitude frequency response is discussed, the computer simulation is done.

关 键 词：正弦波振荡电路 输入端 选频网络 反馈性质 反馈网络 正负性质 

分 类 号：TN75[电子电信—电路与系统]