Radio frequency switch
AssigneeRichWave Technology Corp.
InventorsYu-Siang Huang, Chih-Sheng Chen
Life of this patent
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Abstract
A radio frequency (RF) switch includes a signal terminal, a reference voltage terminal and a shunt switch path. The shunt switch path includes a first sub-shunt circuit and a second sub-shunt circuit. The second sub-shunt circuit includes a first transistor and a second transistor coupled in parallel. When switched to a first state, the RF switch has first impedance; when switched to a second state, the RF switch has second impedance; and when switched to a third state, the RF switch has third impedance. The first impedance, the second impedance, and the third impedance are different.
Claims20
A radio frequency (RF) switch comprising:
- a signal terminal;
- a reference voltage terminal;
- and
- a shunt switch path coupled to the signal terminal and the reference voltage terminal, the shunt switch path comprising:
- a first sub-shunt circuit;
- and
- a second sub-shunt circuit comprising a first transistor and a second transistor coupled in parallel;
- wherein when switched to a first state, the RF switch has first impedance;
- when switched to a second state, the RF switch has second impedance;
- and when switched to a third state, the RF switch has third impedance;
- and
- the first impedance, the second impedance, and the third impedance are different.
Dependencies are inferred from the claim text.