Compact high-speed analog-to-digital converter for both I and Q analog to digital conversion
AssigneeMarvell International Ltd.
InventorsHossein Zarei, Chieh-Yu Hsieh
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Abstract
An analog-to-digital converter (ADC) and a receiver that includes the ADC is disclosed. The ADC includes a first filter configured to receive a signal in an I-signal path of the receiver and a second filter configured to receive a signal in a Q-signal path of the receiver. The ADC further includes a quantizer alternatingly in connection with the first and second filters, and at least one DAC alternatingly in connection with the first and second filters. Switches in the ADC are configured to alternate connection between an input of the quantizer and outputs of the first and second filters, and are also configured to alternate connection between an output of the at least one DAC and inputs of the first and second filters.
Claims15
An analog-to-digital converter (ADC) comprising:
- a quantizer;
- a first filter;
- a second filter;
- at least one digital-to-analog converter (DAC);
- and
- a multiplexer configured to alternate connection of the quantizer with the first filter and the second filter, and to alternate connection of the at least one DAC with the first filter and the second filter.
A method for converting a first signal and a second signal to a digital output signal, the method comprising:
- receiving the first signal in a first filter;
- receiving the second signal in a second filter;
- alternate receiving and sampling with a quantizer of a filtered first signal from the first filter and a filtered second signal from the second filter;
- sending an output signal of the quantizer to at least one digital-to-analog converter (DAC) in a feedback loop;
- and
- alternate sending the output signal of the at least one DAC to the first filter and the second filter.
Dependencies are inferred from the claim text.