Dynamic biasing circuit for transceiver
AssigneeIntel Corporation
InventorChia How Low
Life of this patent
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Abstract
Embodiments include apparatuses, methods, and systems for providing a dynamic bias voltage to one or more transistors of a transceiver. In embodiments, a transceiver may include receive circuitry and transmit circuitry coupled to a same input/output (I/O) pad. A dynamic biasing circuit may detect a voltage level of a data signal on the I/O pad, and may generate a dynamic bias voltage having a value based on the detected voltage level. In some embodiments, the dynamic bias voltage may be a selected one of a first bias voltage or a second bias voltage, The dynamic biasing circuit may provide the dynamic bias voltage to one or more transistors of the transceiver to protect the transistors from electrical overstress.
Claims24
A circuit comprising:
- an input/output (I/O) pad to receive a data signal;
- a transceiver coupled to the I/O pad, the transceiver including a transistor coupled to the I/O pad;
- and
- a dynamic biasing circuit coupled to the I/O pad and the transceiver, the dynamic biasing circuit to:
- detect a voltage level of the data signal on the I/O pad;
- generate a dynamic bias voltage having a value based on the detected voltage level of the data signal;
- and
- provide the dynamic bias voltage to the transistor of the transceiver.
A method comprising:
- detecting a voltage level of a data signal on an input/output (I/O) pad, wherein the data signal swings between a first voltage level and a second voltage level;
- generating a dynamic bias voltage based on the detected voltage level, wherein the dynamic bias voltage is a first bias voltage when the voltage level of the data signal is about the first voltage level, and a second bias voltage when the voltage level of the data signal is about the second voltage level, wherein the second bias voltage is greater than the first bias voltage;
- and
- providing the dynamic bias voltage to one or more transistors of a transceiver that is coupled to the I/O pad.
A system comprising:
- a touch screen display;
- a processor coupled to the touch screen display;
- an input/output (I/O) pad;
- a transceiver coupled to the processor and to the I/) ad, the transceiver including:
- transmit circuitry including a transmit driver to transmit data signals via the I/O pad during a transmit mode of the transceiver;
- and
- receive circuitry to receive data signals via the I/O pad during a receive mode of the transceiver;
- and
- a dynamic biasing circuit coupled to the transceiver to, during the receive mode of the transceiver, provide a selected one of a first bias voltage or a second bias voltage to one or more transistors of the transmit driver, the first bias voltage or second bias voltage selected based on a voltage level at the I/O pad.
Dependencies are inferred from the claim text.