Radio frequency switch circuit
First Claim
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1. A radio frequency switch circuit, comprising a first switch circuit connected between a signal port and an antenna port, wherein the first switch circuit comprises:
- a switching circuit controlled to be in a turned on or turned off state based on a gate signal to selectively pass or block a radio frequency signal between a set of terminals of the switching circuit;
a voltage divider connected to the set of terminals of the switching circuit and being configured to output intermediate voltage between the set of terminals of the switching circuit by a voltage dividing node; and
a reactance circuit connected between the voltage dividing node and a body terminal of the switching circuit,wherein the switching circuit comprises a plurality of first switches connected to each other in series,the reactance circuit is connected between the voltage dividing node of the voltage divider and a body terminal of a first switch of the plurality of first switches, andthe first switch of the plurality of first switches that is connected to the reactance circuit is provided in a position closer to the antenna port as compared to another switch of the plurality of first switches that is not connected to the reactance circuit.
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Abstract
A radio frequency switch circuit, according to examples, includes a switching circuit controlled to be in a turned on or turned off state on the basis of a gate signal to thereby allow a radio frequency signal to pass or be blocked; a voltage dividing circuit connected to terminals of the switching circuit that the radio frequency signal passes through and outputting intermediate voltage between the terminals by a voltage dividing node; and an impedance circuit connected between the voltage dividing node and a body terminal of the switching circuit.
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Citations
12 Claims
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1. A radio frequency switch circuit, comprising a first switch circuit connected between a signal port and an antenna port, wherein the first switch circuit comprises:
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a switching circuit controlled to be in a turned on or turned off state based on a gate signal to selectively pass or block a radio frequency signal between a set of terminals of the switching circuit; a voltage divider connected to the set of terminals of the switching circuit and being configured to output intermediate voltage between the set of terminals of the switching circuit by a voltage dividing node; and a reactance circuit connected between the voltage dividing node and a body terminal of the switching circuit, wherein the switching circuit comprises a plurality of first switches connected to each other in series, the reactance circuit is connected between the voltage dividing node of the voltage divider and a body terminal of a first switch of the plurality of first switches, and the first switch of the plurality of first switches that is connected to the reactance circuit is provided in a position closer to the antenna port as compared to another switch of the plurality of first switches that is not connected to the reactance circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A radio frequency switch circuit, comprising:
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a first switch circuit connected between a signal port and an antenna port and operated by a first gate signal; and a second switch circuit connected between the signal port and a ground and operated by a second gate signal, wherein the second switch circuit comprises; a second switching circuit controlled to be in a turned on or turned off state based on the second gate signal to selectively pass or block a radio frequency signal between a set of terminals thereof a second voltage divider connected to the set of terminals of the second switching circuit and outputting intermediate voltage between the set of terminals by a voltage dividing node, and a second reactance circuit connected between the voltage dividing node and a body terminal of the second switching circuit, the second reactance circuit configured to compensate for a difference in impedance, wherein the second switching circuit comprises a plurality of second switches connected to each other in series, the second reactance circuit is connected between the voltage dividing node of the second voltage divider and a body terminal of a second switch of the plurality of second switches, and the second switch of the plurality of second switches that is connected to the second reactance circuit is provided in a position closer to the signal port as compared with another switch of the plurality of second switches that is not connected to the second reactance circuit. - View Dependent Claims (10, 11, 12)
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Specification