Qualcomm Incorporated

Amirali Shayan

Xiaohua Kong

Lew G Chua-Eoan

Mikhail Popovich

Boris Andreev

Farsheed Mahmoudi

James Thomas Doyle

Christopher Phan

Mauricio Calle

IK-Joon Chang

A switch-mode power supply is provided that includes a comparator for producing a pulse-width modulated (PWM) controller clock signal for controlling a power switch in the switch-mode power supply. The switch-mode power supply is configured to superimpose a DC-free version of a ramp voltage with an error voltage to produce a combined voltage. The comparator compares the combined voltage to a reference voltage to produce the PWM controller clock signal.

Start up method for switching converters using the same reference voltage in the error amplifier and PWM comparator

An on-chip sensor measures dynamic power supply noise, such as voltage droop, on a semiconductor chip. In-situ logic is employed, which is sensitive to noise present on the power supply of functional logic of the chip. Exemplary functional logic includes a microprocessor, adder, and/or other functional logic of the chip. The in-situ logic performs some operation, and the amount of time required for performing that operation (i.e., the operational delay) is sensitive to noise present on the power supply. Thus, by evaluating the operational delay of the in-situ logic, the amount of noise present on the power supply can be measured.

On-chip sensor for measuring dynamic power supply noise of the semiconductor chip

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San Diego, CA, United States of America

Amirali Shayan