By constructing the necessary condition and sufficient condition for feedback to exist in a circuit , can derive the methods of short circuit or open circuit for the load or the signal source resistance respectively of the feedback network , to analyze the configurations of the negative feedback circuits 通過構建電路存在反饋的必要條件和充要條件,可引出令反饋電路的負載和信號源內阻分別短路或開路的方法,用于分析負反饋電路的組態(tài)。
If line length is half wave at a certain frequency and both the load resistance rt and source resistance rs are higher than the characteristic impedance zo , then both the voltages at input and at load are maximum at that frequency and both the voltages at input and at load are minimum at half of that frequency 負載端電阻及電源電阻均高于傳輸線特性阻抗情況下,當線長為某頻率波長之半波,則輸入端與負載端電壓在該頻率均為最高,在該頻率之半時則電壓均為最低。
If line length is half wave at a certain frequency and the load resistance rt is lower while source resistance rs is higher than the characteristic impedance zo , then both the voltages at input and at load are minimum at that frequency and both the voltages at input and at load are maximum at half of that frequency 負載端電阻低于傳輸線特性阻抗及電源電阻高于傳輸線特性阻抗情況下,當線長為某頻率波長之半波,則輸入端與負載端電壓在該頻率均為最低,在該頻率之半時則電壓均為最高。