Improving Linearity and Mitigating Process Variations for a Radio-frequency Power Detector
AssigneeApple Inc.
InventorKerim Kibaroglu
Life of this patent
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Abstract
Wireless circuitry is provided that includes a circuit configured to output a radio-frequency signal and a power detector having an input configured to receive the radio-frequency signal. The power detector includes an input transistor and an attenuation circuit coupled to a gate terminal of the input transistor and having series and shunt capacitors of the same capacitor type. The series and shunt capacitors of the same capacitor type can be configured to automatically track process variations of one another for mitigating sensitivity to the process variations. The series and shunt capacitors can have adjustable capacitances that are tuned to adjust a linearity of the power detector.
Claims20
Circuitry comprising:
- a circuit configured to output a radio-frequency signal;
- and
- a power detector having an input port configured to receive the radio-frequency signal from the output of the circuit, wherein the power detector comprises:
- an input transistor;
- and
- an attenuation circuit coupled to a gate terminal of the input transistor and having a first capacitor of a given type and a second capacitor of the given type.
A power detection circuit comprising:
- an input transistor having a first source-drain terminal coupled to an output terminal and having a second source-drain terminal coupled to a power supply line;
- and
- an attenuation circuit coupled to a gate terminal of the input transistor and having a first capacitor and a second capacitor configured to track process variations of the first capacitor.
A power detector comprising:
- an input transistor having a gate terminal configured to receive a radio-frequency signal;
- a series capacitor of a given capacitor type coupled to the gate terminal of the input transistor;
- and
- a shunt capacitor of the given capacitor type coupled to the gate terminal of the input transistor.
Dependencies are inferred from the claim text.