Electrical component
View Patent ↗An electrical component with a filter circuit is specified that includes a first bandstop filter and a second bandstop filter. The first bandstop filter includes at least one resonator operating with acoustic waves and has a first stop band. The second bandstop filter includes LC elements and has a second stop band that lies at least one octave higher than the first stop band.
1. An electrical component comprising:
a filter circuit that comprises a first bandstop filter coupled in series to a second bandstop filter in a single signal path;
wherein the first bandstop filter comprises at least one resonator operating with acoustic waves and a first stop band,
wherein the second bandstop filter comprises LC elements and a second stop band that lies at least one octave higher than the first stop band,
wherein one of the first band stop filter or the second band stop filter comprises a parallel resonator arranged in a shunt arm, and
wherein blocked signals are led to ground at a series resonance of the parallel resonator.
2. The component according to claim 1 , wherein the filter circuit has a pass band and wherein the first stop band lies next to the pass band.
3. The component according to claim 1 , wherein the filter circuit comprises a third bandstop filter that comprises at least one resonator operating with acoustic waves and has a third stop band, wherein the first stop band and the third stop band lie next to each other.
4. The component according to claim 3 , wherein the filter circuit comprises a buffer circuit arranged between the first and the third bandstop filter, the buffer circuit comprising an inductive resistor and/or a capacitor.
5. The component according to claim 1 , wherein the first bandstop filter has a first resonator in a series branch.
6. The component according to claim 1 , wherein the first bandstop filter has a second resonator in a shunt arm.
7. The component according to claim 1 , wherein the second bandstop filter comprises a shunt arm coupled to ground, the shunt arm comprising a series resonator circuit with an inductive resistor and a capacitor, wherein the series resonator circuit has a resonance frequency that lies in the second stop band.
8. The component according to claim 1 , wherein the second bandstop filter comprises a series branch arranged in a signal path the signal path that comprises a parallel resonator circuit with an inductive resistor and a capacitor, wherein a resonance frequency of the parallel resonator circuit lies in the second stop band.
9. The component according to claim 1 , wherein the single signal path comprises a receive path of the component, the filter circuit being arranged in the receive path.
10. The component according to claim 1 , wherein the second bandstop filter is integrated in a carrier substrate on which a chip is arranged, the chip having the at least one resonator operating with acoustic waves.
11. The component according to claim 10 , further comprising at least one additional chip, arranged on the carrier substrate, the at least one additional chip comprising a circuit selected from the group consisting of a balun, a low-noise amplifier, a semiconductor switch, and an integrated receiver circuit.
12. An electrical component comprising:
a filter circuit that comprises a first bandstop filter coupled to a second bandstop filter;
wherein the first bandstop filter comprises at least one resonator operating with acoustic waves and a first stop band;
wherein the second bandstop filter comprises LC elements and a second stop band that lies at least one octave higher than the first stop band;
wherein the filter circuit comprises a third bandstop filter that comprises at least one resonator operating with acoustic waves and has a third stop band, wherein the first stop band and the third stop band lie next to each other,
wherein one of the band stop filters comprises at least one parallel resonator arranged in a shunt arm, and
wherein blocked signals are led to ground at a series resonance of the parallel resonator.
13. The component according to claim 12 , wherein the filter circuit has a pass band and wherein the first stop band lies next to the pass band.
14. The component according to claim 12 , wherein the first bandstop filter has a first resonator in a series branch.
15. The component according to claim 12 , wherein the first bandstop filter has a second resonator in a shunt arm.
16. The component according to claim 12 , wherein the second bandstop filter comprises a shunt arm coupled to ground, the shunt arm comprising a series resonator circuit with an inductive resistor and a capacitor, wherein the series resonator circuit has a resonance frequency that lies in the second stop band.
17. The component according to claim 12 , wherein the second bandstop filter comprises a series branch arranged in a signal path that comprises a parallel resonator circuit with an inductive resistor and a capacitor, wherein a resonance frequency of the parallel resonator circuit lies in the second stop band.
18. The component according to claim 12 , wherein the filter circuit comprises a buffer circuit arranged between the first and the third bandstop filter, the buffer circuit comprising an inductive resistor and/or a capacitor.
19. The component according to claim 12 , wherein the filter circuit is arranged in a receive path of the component.