RADIO FREQUENCY SWITCH CIRCUIT
First Claim
1. A radio frequency switch circuit comprising:
- an antenna terminal;
a first and second RF terminal;
a first through transistor placed between the antenna terminal and the first RF terminal;
a second through transistor placed between the antenna terminal and the second RF terminal;
a first shunt transistor placed between ground and the first RF terminal;
a second shunt transistor placed between the ground and the second RF terminal; and
a distortion compensation circuit including a reverse parallel connected MOS capacitor whose capacitance around 0 volts has voltage dependence that is convex to the minus direction, the distortion compensation circuit being operable to compensate for voltage dependence of off-capacitance around 0 volts of the first and second through transistor and the first and second shunt transistor that is convex to the plus direction,electrical connection between the antenna terminal and the first and second RF terminal being switchable.
1 Assignment
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Accused Products
Abstract
A radio frequency switch circuit includes: an antenna terminal; a first and second RF terminal; a first through transistor placed between the antenna terminal and the first RF terminal; a second through transistor placed between the antenna terminal and the second RF terminal; a first shunt transistor placed between ground and the first RF terminal; a second shunt transistor placed between the ground and the second RF terminal; and a distortion compensation circuit including a reverse parallel connected MOS capacitor whose capacitance around 0 volts has voltage dependence that is convex to the minus direction, the distortion compensation circuit being operable to compensate for voltage dependence of off-capacitance around 0 volts of the first and second through transistor and the first and second shunt transistor that is convex to the plus direction. Electrical connection between the antenna terminal and the first and second RF terminal is switchable.
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Citations
20 Claims
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1. A radio frequency switch circuit comprising:
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an antenna terminal; a first and second RF terminal; a first through transistor placed between the antenna terminal and the first RF terminal; a second through transistor placed between the antenna terminal and the second RF terminal; a first shunt transistor placed between ground and the first RF terminal; a second shunt transistor placed between the ground and the second RF terminal; and a distortion compensation circuit including a reverse parallel connected MOS capacitor whose capacitance around 0 volts has voltage dependence that is convex to the minus direction, the distortion compensation circuit being operable to compensate for voltage dependence of off-capacitance around 0 volts of the first and second through transistor and the first and second shunt transistor that is convex to the plus direction, electrical connection between the antenna terminal and the first and second RF terminal being switchable. - View Dependent Claims (2, 3)
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4. A radio frequency switch circuit comprising:
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an antenna terminal; a first and second RF terminal; a first through transistor placed between the antenna terminal and the first RF terminal; a second through transistor placed between the antenna terminal and the second RF terminal; a first shunt transistor placed between ground and the first RF terminal; a second shunt transistor placed between the ground and the second RF terminal; and a distortion compensation circuit including a reverse parallel connected MOS capacitor and placed at least one of between the antenna terminal and the ground and between the ground and one of the first and second RF terminal, electrical connection between the antenna terminal and the first and second RF terminal being switchable. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12)
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13. A radio frequency switch circuit comprising:
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an antenna terminal; a first and second RF terminal; a first through transistor placed between the antenna terminal and the first RF terminal; a second through transistor placed between the antenna terminal and the second RF terminal; a first shunt transistor placed between ground and the first RF terminal; a second shunt transistor placed between the ground and the second RF terminal; and a distortion compensation circuit including a reverse parallel connected MOS capacitor, at least one of the first through transistor, the second through transistor, the first shunt transistor, and the second shunt transistor being connected parallel to the distortion compensation circuit, and electrical connection between the antenna terminal and the first and second RF terminal being switchable. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification