发明名称 |
RF LADDER FILTER WITH SIMPLIFIED ACOUSTIC RF RESONATOR PARALLEL CAPACITANCE COMPENSATION |
摘要 |
An RF ladder filter having a parallel capacitance compensation circuit is disclosed. The parallel capacitance compensation circuit is made up of a first inductive element with a first T-terminal and a first end coupled to a first ladder terminal and a second inductive element with a second T-terminal that is coupled to the first T-terminal of the first inductive element and a second end coupled to a second ladder terminal. Further included is a compensating acoustic RF resonator (ARFR) having a fixed node terminal and a third T-terminal that is coupled to the first T-terminal of the first inductive element and the second T-terminal of the second inductive element, and a finite number of series-coupled ladder ARFRs, wherein the parallel capacitance compensation circuit is coupled across one of the finite number of series-coupled ARFRs by way of the first ladder terminal and the second ladder terminal. |
申请公布号 |
US2016191012(A1) |
申请公布日期 |
2016.06.30 |
申请号 |
US201615004084 |
申请日期 |
2016.01.22 |
申请人 |
RF Micro Devices, Inc. |
发明人 |
Khlat Nadim;Folkmann Andrew F.;Aigner Robert;Granger-Jones Marcus |
分类号 |
H03H9/58;H03H9/205 |
主分类号 |
H03H9/58 |
代理机构 |
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代理人 |
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主权项 |
1. An RF ladder filter comprising:
a parallel capacitance compensation circuit having a first ladder terminal and a second ladder terminal comprising:
a first inductive element with a first T-terminal and a first end coupled to the first ladder terminal;a second inductive element with a second T-terminal that is coupled to the first T-terminal of the first inductive element and a second end coupled to the second ladder terminal; anda compensating acoustic RF resonator (ARFR) having a fixed node terminal and a third T-terminal that is coupled to the first T-terminal of the first inductive element and the second T-terminal of the second inductive element; and a finite number of series-coupled ladder ARFRs, wherein the parallel capacitance compensation circuit is coupled across one of the finite number of series-coupled ARFRs by way of the first ladder terminal and the second ladder terminal. |
地址 |
Greensboro NC US |