【英语翻译Theintersectionoftheresponsesexhibitsacombinedslopeof40dBperdecade,leadingtoringingoroutrightoscillation.Let’srefertothatpointasthe“criticalintersectionfrequency.”Compensationforthiscircuitisbestaccom】
问题描述:
英语翻译
Theintersectionoftheresponsesexhibitsacombinedslope
of40dBperdecade,leadingtoringingoroutrightoscillation.
Let’srefertothatpointasthe“criticalintersectionfrequency.”
Compensationforthiscircuitisbestaccomplishedwithan
alternatefeedbackpath;theresponseofwhichwilldominate
atthecriticalintersectionfrequency.
Agoodcriteriafortheresponseofthealternatefeedback
wouldbe:
1.Aresponsewhichdominatesbyatleastanorderofmagnitude
(20dB)atthecriticalintersectionfrequency.
2.Thealternatefeedbackresponseshouldhaveacorner
occurringatafrequencyanorderofmagnitudelessthan
thecriticalintersectionfrequency.
Toprovidethisresponse,thealternatefeedbackcomponents
havebeenselectedtoprovidethecompensatingresponseillustrated
inFigure6.ABinFigure6isthedominantfeedback
paththeamplifierwillseeinitsclosedloopconfiguration.RF
merelyactsasagroundlegreturnimpedanceforthealternate
feedbackloop,andshouldbealowvaluebetween100and
1000ohms.Rdisthenselectedtoprovidethedesiredhigh
frequencygain,andCfisselectedforthealternatefeedback
corner.
卢金发回答:
反应的交叉点陈列一个联合的倾斜 of40dB每个十年,导致敲响或彻底的动摆. Let’s提到那点作为“critical交叉点frequency.”这条电路的Compensation最好完成与 alternate反馈通道;将控制的反应 at重要交叉点频率.供选择反馈的反应的A好标准 would是： 1.由至少数量级控制的反应 (20dB)以重要交叉点频率. 2.供选择反馈反应应该有角落 occurring以频率数量级较少比 the重要交叉点频率. To提供这个反应,供选择反馈组分 have被选择提供补偿的反应说明了 in图6.AB在表6是统治反馈放大器在它的闭合回路配置将看见的path.RF merely作为代替的地面腿回归阻抗 feedback圈,和应该是在100范围的低值和 1000欧姆.Rd然后被选择提供期望上流 frequency获取和锎为供选择反馈被选择 corner.