Switch with envelope injection
First Claim
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1. A switching circuit with enhanced linearity, the switching circuit comprising:
- a switch configured to receive an input signal, to provide an output signal, and to receive an envelope signal corresponding to an envelope of the input signal, the input signal including a first tone at a first frequency and a second tone at a second frequency, and the envelope signal having a frequency corresponding to a difference between the first frequency and the second frequency; and
an envelope generator configured to generate the envelope signal so as to cause intermodulation distortion in the output signal to be reduced, the envelope generator being configured to adjust a phase of the envelope signal.
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Abstract
Aspects of this disclosure relate to a switching circuit with enhanced linearity. The switching circuit can include a switch and an envelope generator. The switch can receive an input signal, provide an output signal, and receive an envelope signal corresponding to an envelope of the input signal. The envelope generator can generate the envelope signal so as to cause intermodulation distortion in the output signal to be reduced to cause linearity of the switch to be improved.
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Citations
20 Claims
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1. A switching circuit with enhanced linearity, the switching circuit comprising:
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a switch configured to receive an input signal, to provide an output signal, and to receive an envelope signal corresponding to an envelope of the input signal, the input signal including a first tone at a first frequency and a second tone at a second frequency, and the envelope signal having a frequency corresponding to a difference between the first frequency and the second frequency; and an envelope generator configured to generate the envelope signal so as to cause intermodulation distortion in the output signal to be reduced, the envelope generator being configured to adjust a phase of the envelope signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A radio frequency system comprising:
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a radio frequency source configured to provide a radio frequency signal, the radio frequency signal including a first tone at a first frequency and a second tone at a second frequency; a switch configured to pass the radio frequency signal; and an envelope generator configured to generate an envelope signal corresponding to an envelope of the radio frequency signal and to apply the envelope signal to the switch to cause intermodulation distortion to be reduced, the envelope signal having a frequency corresponding to a difference between the first frequency and the second frequency, and the envelope generator being configured to adjust a phase of the envelope signal. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method of switching a radio frequency signal with improved linearity, the method comprising:
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generating an envelope signal with an envelope generator, the envelope generator configured to adjust a phase of the envelope signal; providing the envelope signal to a radio frequency switch; and passing a radio frequency signal using the radio frequency switch while the radio frequency switch receives the envelope signal such that the envelope signal reduces intermodulation distortion associated with the radio frequency switch, the radio frequency signal including a first tone at a first frequency and a second tone at a second frequency, and the envelope signal having a frequency corresponding to a difference between the first frequency and the second frequency. - View Dependent Claims (18, 19, 20)
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Specification