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US 11,695,442 B2Granted
Transceiver with time domain IQMM estimation
AssigneeTexas Instruments Incorporated
InventorSucheth S. Kuncham
Life of this patent
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Abstract
A receiver includes a switch network, a mixer, and an IQ mismatch (IQMM) estimation circuit. The switch network is adapted to be coupled to an output of a transmitter. The switch network is configured to selectably swap complementary signals of a differential pair. The mixer is coupled to the switch network and is configured to down-convert an output signal of the switch network. The IQ IQMM estimation circuit is coupled to the mixer, and is configured to estimate an IQMM of the transmitter based on an output signal of the mixer.
Claims14
A transceiver circuit, comprising:
- a transmitter including:
- an IQ mismatch (IQMM) correction circuit;
- and
- a power amplifier including:
- an input coupled to the IQMM correction circuit;
- and
- an output;
- and
- a receiver coupled to the output of the power amplifier, and including:
- a switch network coupled to the output of the power amplifier, and including:
- a first input, a second input, a first output, and a second output;
- a first switch coupled between the first input and the first output;
- a second switch coupled between the first input and the second output;
- a third switch coupled between the second input and the second output;
- and
- a fourth switch coupled between the second input and the first output;
- a mixer coupled to the first output and the second output of the switch network;
- and
- an IQMM estimation circuit coupled to the mixer and the IQMM correction circuit.
16 more elements
A transceiver circuit comprising:
- a transmitter including:
- an IQ mismatch (IQMM) correction circuit including an input and an output;
- a digital-to-analog converter (DAC) including an input coupled to the output of the IQMM correction circuit, wherein the DAC further includes an output;
- and
- a power amplifier including an input coupled to the output of the IQMM correction circuit, wherein the power amplifier further includes an output;
- a coupler including an input coupled to the output of the power amplifier, wherein the coupler further includes an output;
- and
- a receiver coupled to the output of the coupler, wherein the receiver further includes:
- a switch network coupled to the output of the coupler, wherein the switch network further includes:
- a first input, a second input, a first output, and a second output;
- a first switch coupled between the first input and the first output;
- a second switch coupled between the first input and the second output;
- a third switch coupled between the second input and the second output;
- and
- a fourth switch coupled between the second input and the first output;
- a mixer coupled to the first output and the second output of the switch network, wherein the mixer further includes an output;
- an analog-to-digital converter (ADC) including an input coupled to the output of the mixer, wherein the ADC further includes an output;
- and
- an IQMM estimation circuit including an input coupled to the output of the ADC, wherein the IQMM estimation circuit further includes output coupled to the input of the IQMM correction circuit.
16 more elements
Dependencies are inferred from the claim text.