Advanced Micro Devices Corporation

John David Schell

Edward C Guerrero, Jr

Christopher Eric Tressler

Jamie Juarez

Adam Thomas Snider

Various embodiments of a circuit and method for arbitrating voltage requests in a computer system are disclosed. In a first embodiment, one or more devices in a computer system assert a plurality of voltage requests. These voltage requests are received by an arbiter which outputs a single voltage request. The outputted voltage request is received by one or more power supplies configured to supply a voltage to the devices. In this way, the devices all receive the same voltage even if they originally requested different voltages. In some embodiments, the arbiter may output a voltage request that is selected from the voltage requests asserted by the devices.

Voltage request arbiter

A voltage-dependent impedance selector compensates for non-linearities that arise when the operating voltage of an electronic circuit changes. The voltage-dependent impedance selector includes a selection stage that selects a impedance based on the operating voltage of the electronic circuit. The selected impedance is connected to an output stage having a resistive value so that the selected impedance and the output stage form a voltage divider. The voltage-dependent impedance selector may, in some embodiments, be used in reference voltage generation or in impedance matching.

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Round Rock, TX, United States of America

John David Schell