Resonator interconnections in monolithic crystal filters
阅读：163发布：2023-03-23
专利汇可以提供Resonator interconnections in monolithic crystal filters专利检索，专利查询，专利分析的服务。并且In a multiresonator modified monolithic crystal filter employing a combination of mass loading and acoustic coupling, a direct nongrounded conductor, external to the piezoelectric body between two of the resonators, establishes a second transmission path through the filter. Attenuation peaks with control over their position are established thereby which enhances filter selectivity.，下面是Resonator interconnections in monolithic crystal filters专利的具体信息内容。
1. A monolithic crystal filter comprising, in combination, a plurality of resonators each including a respective portion of a common piezoelectric body sandwiched between a respective pair of electrodes, said resonators including an input resonator, an output resonator and at least two auxiliary resonators, a nongrounded, floating, short circuiting, conducting path external to said body connecting one electrode of one of said auxiliary resonators to a corresponding electrode of another of said auxiliary resonators, both of said auxiliary resonators being nonshorted an input point and means independent of said path directly connecting said input point to an electrode of said input resonator, and an output point and means independent of said path directly connecting said output point to an electrode of said output resonator.
2. Apparatus in accordance with claim 1 wherein the number of said auxiliary resonators exceeds two, and means shorting each of said auxiliary resonators that is otherwise unconnected.
3. Apparatus in accordance with claim 2 including means connecting one side of each of said resonators to a source of reference potential.
4. Apparatus in accordance with claim 1 wherein said auxiliary resonators are positioned substantIally between said input and output resonators.
5. Apparatus in accordance with claim 1 wherein said resonators are in substantial alignment and said input resonator is positioned substantially between two of said auxiliary resonators.
6. Apparatus in accordance with claim 1 wherein said input and output resonators are positioned between two of said auxiliary resonators.
7. A monolithic crystal filter comprising, in combination, a plurality of resonators each including a respective portion of a common piezoelectric body sandwiched between a respective pair of electrodes, said resonators including an input resonator, an output resonator and at least two auxiliary resonators, a nongrounded, short circuiting conducting path external to said body connecting one electrode of one of said auxiliary resonators to a corresponding electrode of another of said auxiliary resonators, both of said auxiliary resonators being nonshorted an input point and means independent of said path directly connecting said input point to an electrode of said input resonator, and an output point and means independent of said path directly connecting said output point to an electrode of said output resonator.
8. Apparatus in accordance with claim 7 wherein said auxiliary resonators are positioned substantially between said input and output resonators.
9. Apparatus in accordance with claim 7 wherein said resonators are in substantial alignment and said input resonator is positioned substantially between two of said auxiliary resonators.
10. Apparatus in accordance with claim 7 wherein said input and output resonators are positioned between two of said auxiliary resonators.
11. Apparatus in accordance with claim 7 including a capacitor connected between said path and a source of reference potential.
12. Apparatus in accordance with claim 11 wherein said auxiliary resonators are positioned substantially between said input and output resonators.
13. Apparatus in accordance with claim 18 wherein said resonators are in substantial alignment and said input resonator is positioned substantially between two of said auxiliary resonators.
14. Apparatus in accordance with claim 11 wherein said input and output resonators are positioned between two of said auxiliary resonators.
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