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Консультация № 193212
10.05.2018, 17:48
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1
Здравствуйте! У меня возникли сложности с таким вопросом:
Зависимость напряжения на выходе параллельного контура от частоты при различных значениях внутреннего сопротивления генератора (Ri). Полоса пропускания контура по напряжению, способы ее регулировки.
Задача. Найти полосу пропускания и добротность контура, если его резонансная частота 530 кГц, а верхняя граничная частота полосы пропускания 535 кГц.
Зависимость напряжения на выходе параллельного контура от частоты при различных значениях внутреннего сопротивления генератора (Ri). Полоса пропускания контура по напряжению, способы ее регулировки.
Задача. Найти полосу пропускания и добротность контура, если его резонансная частота 530 кГц, а верхняя граничная частота полосы пропускания 535 кГц.
Обсуждение
15.05.2018, 06:29
общий
это ответ
Здравствуйте, kyrmanova88!
Полоса пропускания контура с резонансной частотой f[sub]c[/sub] и добротностью Q равна П[sub]пр[/sub] = f[sub]c[/sub]/Q. С другой стороны, П[sub]пр[/sub] = f[sub]в[/sub] - f[sub]н[/sub], где f[sub]в[/sub] = f[sub]c[/sub] + П[sub]пр[/sub]/2 и f[sub]н[/sub] = f[sub]c[/sub] - П[sub]пр[/sub]/2 - верхняя и нижняя граница полосы пропускания. В данном случае для f[sub]в[/sub] = 535 кГц и f[sub]c[/sub] = 530 кГц получаем П[sub]пр[/sub] = 2(f[sub]в[/sub]-f[sub]c[/sub]) = 2(535-530) = 10 кГц и Q = f[sub]c[/sub]/П[sub]пр[/sub] = 530/10 = 53.
Полоса пропускания контура с резонансной частотой f[sub]c[/sub] и добротностью Q равна П[sub]пр[/sub] = f[sub]c[/sub]/Q. С другой стороны, П[sub]пр[/sub] = f[sub]в[/sub] - f[sub]н[/sub], где f[sub]в[/sub] = f[sub]c[/sub] + П[sub]пр[/sub]/2 и f[sub]н[/sub] = f[sub]c[/sub] - П[sub]пр[/sub]/2 - верхняя и нижняя граница полосы пропускания. В данном случае для f[sub]в[/sub] = 535 кГц и f[sub]c[/sub] = 530 кГц получаем П[sub]пр[/sub] = 2(f[sub]в[/sub]-f[sub]c[/sub]) = 2(535-530) = 10 кГц и Q = f[sub]c[/sub]/П[sub]пр[/sub] = 530/10 = 53.
5
Спасибо, Вам большое!!! Вы мне очень помогли!
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