Data-path architecture for analog-to-digital converters
AssigneeAvago Technologies International Sales Pte. Limited
InventorsHeng Zhang, Delong Cui, Jun Cao
Life of this patent
Estimating the term…
Abstract
An example data path to a receiver includes: an analog front-end circuit (AFE) configured to receive a first voltage supply; a first circuit coupled to an output of the AFE, the first circuit including: a first buffer having an input coupled to the output of the AFE; a second buffer; a first switch coupled between an output of the first buffer and an input of the second buffer; and a second switch coupled between an output of the second buffer and an input of an ADC of the receiver; wherein the first buffer is configured to receive the first voltage supply, the second buffer is configured to receive a second voltage supply, and the ADC is configured to receive a third voltage supply less than the first voltage supply.
Claims20
A data path for a receiver, comprising:
- an analog front-end circuit (AFE) configured to receive a first voltage supply;
- a first circuit coupled between an output of the AFE and an input of an analog-to-digital converter (ADC) of the receiver, the first circuit including:
- a first buffer having an input coupled to the output of the AFE;
- a second buffer;
- a first switch coupled between an output of the first buffer and an input of the second buffer;
- and
- a second switch coupled between an output of the second buffer and the input of the ADC;
- wherein the first buffer is configured to receive the first voltage supply, the second buffer is configured to receive a second voltage supply, and the ADC is configured to receive a third voltage supply less than the first voltage supply.
A receiver, comprising:
- an analog-to-digital converter (ADC);
- an analog front-end circuit (AFE) configured to receive a first voltage supply;
- a first circuit coupled between an output of the AFE and an input of the ADC, the first circuit including:
- a first buffer having an input coupled to the output of the AFE;
- a second buffer;
- a first switch coupled between an output of the first buffer and an input of the second buffer;
- and
- a second switch coupled between an output of the second buffer and the input of the ADC;
- wherein the first buffer is configured to receive the first voltage supply, the second buffer is configured to receive a second voltage supply less than the first voltage supply, and the ADC is configured to receive a third voltage supply less than the second voltage supply.
A method of providing an input of an analog-to-digital converter (ADC), the method comprising:
- receiving, by an analog front-end circuit (AFE), an analog signal, the AFE operating using a first voltage supply;
- sampling, by a first circuit, an output of the AFE to provide the input of the ADC;
- supplying the first voltage supply to a first buffer of the first circuit;
- supplying a second voltage supply that is less than the first voltage supply to a second buffer of the first circuit;
- and
- supplying a third voltage supply that is less than the second voltage supply to the ADC.
Dependencies are inferred from the claim text.