Method and apparatus for canceling balun amplifier noise
AssigneeIndustrial Technology Research Institute
InventorsMing-Ching Kuo, Yi-Shing Shih, Shih-Hao Tarng
Life of this patent
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Abstract
The noise figure of a low noise amplifier (LNA) is reduced without sacrificing performance such as gain, IIP3, and wideband impedance matching. Embodiments include configuring a control module of the LNA to sum and scale an output from a current-sensing branch of the LNA and an output from a voltage sensing branch of the LNA into one or more summed and scaled outputs. The control module also feeds the one or more summed and scaled outputs back to at least one of the outputs of the branches of the LNA.
Claims20
A method for cancelling balun amplifier noise, comprising:
- summing and scaling an output from a current-sensing branch of an amplifier and an output from a voltage sensing branch of the amplifier into one or more summed and scaled outputs;
- and
- feeding the one or more summed and scaled outputs back to at least one of the outputs of the branches of the amplifier.
An apparatus for cancelling balun amplifier noise, comprising:
- a current sensing amplifier;
- a voltage sensing amplifier;
- and
- a control module which sums and scales an output from the current sensing amplifier and an output from the voltage sensing amplifier, and the control module feeds one or more summed and scaled outputs back to at least one of the outputs of the current and sensing voltage amplifiers.
An apparatus for cancelling balun amplifier noise, comprising:
- at least one processor;
- and
- at least one memory including computer program code for one or more programs,
- the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following,
- sum and scale an output from a current-sensing branch of an amplifier and an output from a voltage sensing branch of the amplifier into one or more summed and scaled outputs;
- and
- feed the one or more summed and scaled outputs back to at least one of the outputs of the branches of the amplifier.
Dependencies are inferred from the claim text.