Qualcomm Incorporated

Shahin Solki

Paul Penzes

Dipti Ranjan Pal

Farsheed Mahmoudi

An apparatus and method are disclosed for providing voltage control at a load of a buck converter. The buck converter is in a feedback loop so that a reference voltage determines a pulse width modulated (PWM) signal that is fed to the buck converter, and an output voltage of the buck converter is fed back to a PWM control circuit to maintain a value of the output voltage. The load at the buck converter provides event counters to a transient load current prediction circuit, which uses a curve fitting algorithm or other adaptive control algorithm to predict a change in current at the load. The transient load current prediction circuit then manipulates the reference voltage in accordance with the predicted change in current at the load.

Circuits and methods providing supply voltage control based on transient load prediction

A duty cycle adjustment apparatus includes a duty cycle adjustment determination module configured to determine an adjustment to a duty cycle of a clock signal, and includes a clock delay module configured to receive the clock signal, to delay the clock signal through first and second delay stage modules (with a first and a second plurality of delay paths, respectively) based on the duty cycle adjustment determined by the duty cycle adjustment determination module, and to output the delayed clock signal. The second plurality of delay paths have a greater delay difference between each of the corresponding delay paths than the first plurality of delay paths. The apparatus further includes a duty cycle adjustment module configured to receive the clock signal and the delayed clock signal, to adjust the duty cycle of the clock signal based on the delayed clock signal, and to output a duty cycle adjusted clock signal.

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San Diego, CA, United States of America

Shahin Solki