Receiver and decoder for extreme low power, unterminated, multi-drop serdes
AssigneeQUALCOMM Incorporated
InventorsJason GONZALEZ, Puxuan DONG, Lior AMARILIO
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Abstract
Systems and methods for multi-threshold sensing at an audio receiver, and systems and methods for calibrating an audio system to optimize for the specific configuration of the audio system are disclosed herein. In some implementations of a multi-threshold receiver, at least one additional voltage level is selected to trigger latching events within the receiver based on changes of the receiver input (which includes differential signals Vp and Vn) and in turn, to generate internal signals within the multi-threshold receiver, and then logic operations are performed on these internal signals to generate the output of the multi-threshold receiver.
Claims17
An audio slave device, comprising:
- an interface configured to communicatively couple to an audio bus to receive audio signals from an audio master device;
- and
- an audio receiver coupled to the interface, the audio receiver configured to perform multi-threshold sensing on the audio signals received from the interface.
An audio system, comprising:
- an audio master device;
- an audio bus;
- and
- a first audio slave device coupled to the audio master device via the audio bus, the audio slave device having
- an interface configured to communicatively coupled to the audio bus to receive audio signals from the audio master device, and
- an audio receiver coupled to the interface, the audio receiver configured to perform multi-threshold sensing on the audio signals received from the interface;
- wherein a length of the audio bus between the audio master device and the first audio slave device is less than 50 centimeters.
A method for multi-threshold sensing in an audio receiver, comprising:
- selecting a first voltage for sensing signals received;
- selecting a second voltage for triggering latching events within the audio receiver based on changes in voltage level of the signals received;
- generating a plurality of internal signals within the audio receiver in response to the latching events;
- and
- performing logic operations on the plurality of internal signals to determine a value of an output of the audio receiver when the audio receiver is unable to sense accurately.
An apparatus for multi-threshold sensing in an audio receiver, comprising:
- means for selecting a first voltage for sensing signals received;
- means for selecting a second voltage for triggering latching events within the audio receiver based on changes in voltage level of the receiver input signals;
- means for generating a plurality of internal signals within the audio receiver in response to the latching events;
- and
- means for performing logic operations on the plurality of internal signals to determine a value of an output of the audio receiver when the audio receiver is unable to sense accurately.
Dependencies are inferred from the claim text.