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US 11,581,852 B2Granted
Systems and methods for detecting local oscillator leakage and image tone in I/Q mixer based transceivers
AssigneeSamsung Electronics Co., Ltd.
InventorsHariharan Nagarajan, Ashutosh Verma, Chung Lau, Tienyu Chang
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Abstract
According to one embodiment, a transceiver includes: a radio transmitter including a power amplifier; a detector circuit including: a squaring circuit configured to receive an output of the power amplifier of the radio transmitter and configured to produce an output current; and a DC current absorber electrically connected to an output terminal of the squaring circuit.
Claims20
A transceiver comprising:
- a radio transmitter comprising a power amplifier;
- and
- a detector circuit comprising:
- a squaring circuit configured to receive an output of the power amplifier of the radio transmitter and configured to produce an output current;
- and
- a DC current absorber electrically connected to an output terminal of the squaring circuit.
3 more elements
A method comprising:
- supplying an output of a power amplifier of a radio transmitter of a radio transceiver to a squaring circuit of a detector circuit of the radio transceiver to generate an output current, the output current of the squaring circuit comprising:
- a direct current (DC) component comprising a function of a desired tone of the output of the power amplifier;
- and
- an alternating current (AC) component comprising:
- a function of a local oscillator leakage tone of the output of the power amplifier;
- and
- a function of an image tone of the output of the power amplifier;
- and
- absorbing, by a DC current absorber of the detector circuit, the DC component of the output current to produce a filtered output of the squaring circuit, wherein the filtered output comprises the function of the local oscillator leakage tone and the function of the image tone.
6 more elements
Dependencies are inferred from the claim text.