RU2008142162A

RU2008142162A - LINE TUNABLE LC-FILTER

Info

Publication number: RU2008142162A
Application number: RU2008142162/09A
Authority: RU
Inventors: Лилия Владиславовна Насонова (RU); Лилия Владиславовна Насонова; Игорь Михайлович Ясинский (RU); Игорь Михайлович Ясинский; Андрей Николаевич Яковлев (RU); Андрей Николаевич Яковлев
Priority date: 2008-10-23
Filing date: 2008-10-23
Publication date: 2010-04-27
Also published as: RU2396701C2

Abstract

Полосовой перестраиваемый LC-фильтр, состоящий из n каскадно включенных Г-образных полузвеньев фильтров верхних частот, каждое из которых содержит конденсатор в последовательной ветви, первый вывод конденсатора является входом полузвена, а второй - выходом, к которому подключена катушка индуктивности, второй выход которой соединен с другим кнденсатором, при этом вход первого полузвена соединен с входной потенциальной клеммой фильтра, а вторые выводы конденсаторов, входящих в параллельные ветви первых k полузвеньев, подключены к общей шине, к выходу последнего полузвена подключены каскадно m Г-образных полузвеньев фильтров нижних частот, каждое из которых содержит в последовательной ветви катушку индуктивности и параллельно с нею соединенный конденсатор, первые выводы этой катушки и конденсатора являются входом полузвена, а их вторые выводы - выходом, к которому подключен другой конденсатор, при этом выход последнего полузвена соединен с выходной потенциальной клеммой фильтра, а вторые выводы конденсаторов параллельных ветвей последних l полузвеньев фильтров нижних частот соединены с общей шиной, здесь k<n и l<m любые целые числа, отличающийся тем, что в состав фильтра введены четыре группы ключей, первая группа содержит n-k ключей, первые выводы которых подключены ко входным выводам полузвеньев фильтра верхних частот начиная с k+1-го и до n-го соответственно, а вторые выводы этих ключей соединены с выходом фильтра верхних частот, вторая группа, состоящая из n-k ключей, подключенных первыми выводами ко вторым выводам n-k конденсаторов, входящих в параллельные ветви фильтров верхних частот начиная с k+1-го полузвен Tunable band-pass LC filter, consisting of n cascaded L-shaped half links of high-pass filters, each of which contains a capacitor in a serial branch, the first output of the capacitor is the input of the half-link, and the second is the output to which the inductance coil is connected, the second output of which is connected with another capacitor, while the input of the first half link is connected to the input potential terminal of the filter, and the second outputs of the capacitors included in the parallel branches of the first k half links are connected to a common e, the cascade of m L-shaped half links of low-pass filters are connected to the output of the last half link, each of which contains an inductance coil and a capacitor connected in parallel to it, the first conclusions of this coil and capacitor are the half-link input, and their second conclusions are the output, to which another capacitor is connected, while the output of the last half link is connected to the output potential terminal of the filter, and the second conclusions of the capacitors of the parallel branches of the last l half links of the lower filters the cells are connected to a common bus, here k <n and l <m are any integers, characterized in that the filter contains four groups of keys, the first group contains nk keys, the first pins of which are connected to the input pins of the high-pass filter half-links starting from k + 1 and up to the n-th, respectively, and the second outputs of these keys are connected to the output of the high-pass filter, the second group consisting of nk keys connected by the first conclusions to the second conclusions of nk capacitors included in parallel branches of the high-pass filters starting from k + 1st half link

Claims

Tunable band-pass LC filter, consisting of n cascaded L-shaped half links of high-pass filters, each of which contains a capacitor in a serial branch, the first output of the capacitor is the input of the half-link, and the second is the output to which the inductance coil is connected, the second output of which is connected with another capacitor, while the input of the first half link is connected to the input potential terminal of the filter, and the second outputs of the capacitors included in the parallel branches of the first k half links are connected to a common e, the cascade of m L-shaped half links of low-pass filters are connected to the output of the last half link, each of which contains an inductance coil and a capacitor connected in parallel to it, the first conclusions of this coil and capacitor are the half-link input, and their second conclusions are the output, to which another capacitor is connected, while the output of the last half link is connected to the output potential terminal of the filter, and the second conclusions of the capacitors of the parallel branches of the last l half links of the lower filters the cells are connected to a common bus, here k <n and l <m are any integers, characterized in that the filter contains four groups of keys, the first group contains nk keys, the first pins of which are connected to the input pins of the high-pass filter half-links starting from k + 1 and up to the n-th, respectively, and the second outputs of these keys are connected to the output of the high-pass filter, the second group consisting of nk keys connected by the first conclusions to the second conclusions of nk capacitors included in parallel branches of the high-pass filters starting from k + 1st half link and until the nth, respectively, the second outputs of these keys are connected to a common bus, the third group contains ml keys, the first outputs of which are connected to the inputs of the half-links of the low-pass filters from l + 1 to the m-th, respectively, the second outputs of these keys connected to the output of the mth half link, the fourth group consisting of ml keys, the first conclusions of which are connected to the second conclusions of ml capacitors included in the parallel branches of low-pass filters starting from l + 1 of the half link and to the mth, respectively, the second conclusions these keys are connected to common th bus.