RX shunt switching element-based RF front-end circuit
First Claim
1. RF front-end circuitry comprising:
- a first reconfigurable RF filter having a first reconfigurable RF filter path, a first connection node, and an internal connection node, and comprising a first coupling circuit, a first resonator, a second resonator, a third resonator, and a first receive (RX) shunt switching element, wherein;
the first RX shunt switching element is coupled between the first reconfigurable RF filter path and ground; and
the first coupling circuit, the first resonator, the second resonator, and the third resonator are coupled in series between a first common connection node and the first connection node; and
a first RF low noise amplifier (LNA) having an input coupled to the first reconfigurable RF filter path, wherein;
the RF front-end circuitry has the first common connection node and is configured to operate in one of a plurality of operating modes;
the plurality of operating modes comprises a first operating mode and a second operating mode;
during the first operating mode, the first RX shunt switching element is configured to be ON; and
during the second operating mode, the first RX shunt switching element is configured to be OFF and the first RF LNA is configured to receive and amplify a first filtered RF RX signal from the first reconfigurable RF filter via the first common connection node to provide a first RX signal.
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Accused Products
Abstract
RF front-end circuitry, which includes a first RF low noise amplifier (LNA) and a first reconfigurable RF filter, is disclosed. The RF front-end circuitry operates in one of a group of operating modes. The first reconfigurable RF filter, which has a first reconfigurable RF filter path, includes a first receive (RX) shunt switching element coupled between the first reconfigurable RF filter path and ground. The first reconfigurable RF filter path is coupled to an input of the first RF LNA. The group of operating modes includes a first operating mode and a second operating mode. During the first operating mode, the first RX shunt switching element is ON. During the second operating mode, the first RX shunt switching element is OFF and the first RF LNA receives and amplifies a first filtered RF receive signal from the first reconfigurable RF filter to provide a first receive signal.
156 Citations
19 Claims
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1. RF front-end circuitry comprising:
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a first reconfigurable RF filter having a first reconfigurable RF filter path, a first connection node, and an internal connection node, and comprising a first coupling circuit, a first resonator, a second resonator, a third resonator, and a first receive (RX) shunt switching element, wherein; the first RX shunt switching element is coupled between the first reconfigurable RF filter path and ground; and the first coupling circuit, the first resonator, the second resonator, and the third resonator are coupled in series between a first common connection node and the first connection node; and a first RF low noise amplifier (LNA) having an input coupled to the first reconfigurable RF filter path, wherein; the RF front-end circuitry has the first common connection node and is configured to operate in one of a plurality of operating modes; the plurality of operating modes comprises a first operating mode and a second operating mode; during the first operating mode, the first RX shunt switching element is configured to be ON; and during the second operating mode, the first RX shunt switching element is configured to be OFF and the first RF LNA is configured to receive and amplify a first filtered RF RX signal from the first reconfigurable RF filter via the first common connection node to provide a first RX signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14)
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13. RF front-end circuitry comprising:
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a first capacitive compensation switching element; a first capacitive compensation circuit; a first reconfigurable RF filter having a first reconfigurable RF filter path and comprising a first receive (RX) shunt switching element coupled between the first reconfigurable RF filter path and ground; and a first RF low noise amplifier (LNA) having an input coupled to the first reconfigurable RF filter path, wherein; the RF front-end circuitry has a first common connection node and is configured to operate in one of a plurality of operating modes; the plurality of operating modes comprises a first operating mode and a second operating mode; during the first operating mode, the first RX shunt switching element is configured to be ON; during the second operating mode, the first RX shunt switching element is configured to be OFF and the first RF LNA is configured to receive and amplify a first filtered RF RX signal from the first reconfigurable RF filter via the first common connection node to provide a first RX signal; and the first capacitive compensation switching element and the first capacitive compensation circuit are coupled in series between the first reconfigurable RF filter path and ground, wherein during the first operating mode, the first capacitive compensation switching element is configured to be OFF, and during the second operating mode, the first capacitive compensation switching element is configured to be ON, thereby at least partially compensating for loading of the first reconfigurable RF filter path by the first RX shunt switching element.
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15. RF front-end circuitry comprising:
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a first RF PA; a first reconfigurable RF filter having a first reconfigurable RF filter path and comprising a first receive (RX) shunt switching element coupled between the first reconfigurable RF filter path and ground; and a first RF low noise amplifier (LNA) having an input coupled to the first reconfigurable RF filter path, wherein; the RF front-end circuitry has a first common connection node and is configured to operate in one of a plurality of operating modes; the plurality of operating modes comprises a first operating mode and a second operating mode; during the first operating mode, the first RX shunt switching element is configured to be ON; during the second operating mode, the first RX shunt switching element is configured to be OFF and the first RF LNA is configured to receive and amplify a first filtered RF RX signal from the first reconfigurable RF filter via the first common connection node to provide a first RX signal; the first reconfigurable RF filter further comprises a first tunable TX series capacitive circuit coupled between the first RF PA and the first common connection node; during the first operating mode, the first tunable TX series capacitive circuit is adjusted to a first impedance and the first RF PA is configured to provide a first upstream RF transmit signal to the first reconfigurable RF filter, which is further configured to provide a filtered RF transmit signal via the first tunable TX series capacitive circuit and the first common connection node; and during the second operating mode, the first tunable TX series capacitive circuit is further adjusted to a second impedance, which is greater than the first impedance.
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16. RF front-end circuitry comprising:
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a first RF PA; a first reconfigurable RF filter having a first reconfigurable RF filter path and comprising a first receive (RX) shunt switching element coupled between the first reconfigurable RF filter path and ground; and a first RF low noise amplifier (LNA) having an input coupled to the first reconfigurable RF filter path, wherein; the RF front-end circuitry has a first common connection node and is configured to operate in one of a plurality of operating modes; the plurality of operating modes comprises a first operating mode and a second operating mode; during the first operating mode, the first RX shunt switching element is configured to be ON; during the second operating mode, the first RX shunt switching element is configured to be OFF and the first RF LNA is configured to receive and amplify a first filtered RF RX signal from the first reconfigurable RF filter via the first common connection node to provide a first RX signal; the first reconfigurable RF filter further comprises a first isolable TX series capacitive circuit coupled between the first RF PA and the first common connection node; during the first operating mode, the first isolable TX series capacitive circuit is adjusted to a first impedance and the first RF PA is configured to provide a first upstream RF transmit signal to the first reconfigurable RF filter, which is further configured to provide a filtered RF transmit signal via the first isolable TX series capacitive circuit and the first common connection node; and during the second operating mode, the first isolable TX series capacitive circuit is further adjusted to provide about an open circuit, such that a magnitude of a resistance between the first RF PA and the first common connection node is greater than 2500 ohms.
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17. RF front-end circuitry having a first connection node and a second connection node, and comprising:
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a first reconfigurable RF filter having a first reconfigurable RF filter path and comprising a first receive (RX) shunt switching element coupled between the first reconfigurable RF filter path and ground, a first coupling circuit, a second coupling circuit, a first resonator, a second resonator, and a third resonator;
such that the first coupling circuit, the first resonator, the second resonator, and the third resonator are coupled in series between a first common connection node and the first connection node via the first reconfigurable RF filter path;
wherein the first coupling circuit, the first resonator, the second resonator, and the second coupling circuit are coupled in series between the first common connection node and the second connection node via a first TX reconfigurable RF filter path, such that the first RX shunt switching element is coupled between the third resonator and ground; anda first RF low noise amplifier (LNA) having an input coupled to the first reconfigurable RF filter path, wherein; the RF front-end circuitry has a first common connection node and is configured to operate in one of a plurality of operating modes; the plurality of operating modes comprises a first operating mode and a second operating mode; during the first operating mode, the first RX shunt switching element is configured to be ON; and during the second operating mode, the first RX shunt switching element is configured to be OFF and the first RF LNA is configured to receive and amplify a first filtered RF RX signal from the first reconfigurable RF filter via the first common connection node to provide a first RX signal. - View Dependent Claims (18, 19)
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Specification