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Консультация № 198224
12.04.2020, 12:01
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Уважаемые эксперты! Пожалуйста, ответьте на вопрос:
АМ-сигнал, изменяющийся по закону s(t)=U0(1+mcos(Wt))cos(w0t), где m = 0,3; W = 4pi.10^3 рад/с; U0 = 5.10^-3 В, поступает на вход резонансного усилителя с коэффициентом передачи K(jw)=100/(1+j(w-w0)/W), где w0=4pi*10^6 рад/с (резонансная частота контура). Найти спектр сигнала на входе и выходе усилителя и закон изменения огибающей сигнала.
АМ-сигнал, изменяющийся по закону s(t)=U0(1+mcos(Wt))cos(w0t), где m = 0,3; W = 4pi.10^3 рад/с; U0 = 5.10^-3 В, поступает на вход резонансного усилителя с коэффициентом передачи K(jw)=100/(1+j(w-w0)/W), где w0=4pi*10^6 рад/с (резонансная частота контура). Найти спектр сигнала на входе и выходе усилителя и закон изменения огибающей сигнала.
Обсуждение
17.04.2020, 02:20
общий
Адресаты:
Есть ли у "Методичка" от Вашего учебного заведения или ссылка на Методичку?
Я давно забыл формулы вычисления. В интернет-помойке я нашёл
РадиоЦепи иСигналы.pdf 7,3 МБ Ссылка1
и РадиоТехЦепи иСигналы.УралУнивер.pdf 8,7 МБ Ссылка2 .
Они очень объёмные, слишком долго изучать. Может в Вашей Методичке есть кратко-конкретное изложение для решения текущей задачи?
Я давно забыл формулы вычисления. В интернет-помойке я нашёл
РадиоЦепи иСигналы.pdf 7,3 МБ Ссылка1
и РадиоТехЦепи иСигналы.УралУнивер.pdf 8,7 МБ Ссылка2 .
Они очень объёмные, слишком долго изучать. Может в Вашей Методичке есть кратко-конкретное изложение для решения текущей задачи?
19.04.2020, 03:24
общий
Адресаты:
Я скачал Manohin.pdf по Вашей 2й ссылке. Но там заумные формулы для учёных-теоретиков, а не практических решений задач типа Вашей. Пришлось удалить, как бесполезный файл.
Консультация Ваша уже истекла. Слишком долго мы искали учебные материалы.
Вы можете повторить свой вопрос после нахождения подходящей методички.
А можете просто умножить закон сигнала s(t)=U0(1+mcos(Wt))cos(w0t)
на коэффициент передачи K(jw)=100/(1+j(w-w0)/W) резонансного усилителя.
Затем постройте график зависимости АЧХ (АмплитудноЧастотной Характеристики), и Вы увидите ясную картину. Амплитуды перед косинусами будут основой Вашего спектра.
Консультация Ваша уже истекла. Слишком долго мы искали учебные материалы.
Вы можете повторить свой вопрос после нахождения подходящей методички.
А можете просто умножить закон сигнала s(t)=U0(1+mcos(Wt))cos(w0t)
на коэффициент передачи K(jw)=100/(1+j(w-w0)/W) резонансного усилителя.
Затем постройте график зависимости АЧХ (АмплитудноЧастотной Характеристики), и Вы увидите ясную картину. Амплитуды перед косинусами будут основой Вашего спектра.
20.04.2020, 23:09
общий
Адресаты:
К сожалению методичка только такая, которую выдал преподаватель по этой задачке для решения домашнего задания
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