Synchronously sampled single bit switch mode power supply
AssigneeQUALCOMM Incorporated
InventorCharles D. Tuten
Life of this patent
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Abstract
A power supply is described. The power supply includes a synchronous sampled comparator. The synchronous sampled comparator includes a first input that receives a reference voltage. The synchronous sampled comparator also includes a second input that receives a feedback signal. The power supply also includes power field effect transistors (FETs). The power supply further includes an inductor coupled to the power FETs and coupled to the second input. The power FETs generate a power supply voltage using the inductor. The power supply voltage is a direct current (DC) power supply voltage.
Claims32
A power supply comprising:
- a synchronous sampled comparator comprising:
- a first input receiving a reference voltage;
- and
- a second input receiving a feedback signal, wherein the synchronous sampled comparator compares the reference voltage and the feedback signal at a sampling frequency;
- power field effect transistors (FETs);
- and
- an inductor coupled to the power FETs and coupled to the second input, wherein the power FETs generate a power supply voltage using the inductor, and wherein the power supply voltage is a direct current (DC) power supply voltage.
A method for providing a power supply voltage comprising:
- generating a serial data stream signal using a synchronous sampled comparator, wherein the synchronous sampled comparator compares a reference voltage and a feedback signal at a sampling frequency and outputs the serial data stream with a switching frequency;
- providing a current to an inductor using power field effect transistors (FETs) to obtain a power supply voltage;
- adjusting the current provided to the inductor using the serial data stream;
- and
- feeding back the power supply voltage to the synchronous sampled comparator.
A computing device configured for providing a power supply voltage comprising:
- means for generating a serial data stream signal using a synchronous sampled comparator, wherein the synchronous sampled comparator compares a reference voltage and a feedback signal at a sampling frequency and outputs the serial data stream with a switching frequency;
- means for providing a current to an inductor using power field effect transistors (FETs) to obtain a power supply voltage;
- means for adjusting the current provided to the inductor using the serial data stream;
- and
- means for feeding back the power supply voltage to the synchronous sampled comparator.
A non-transitory computer-readable medium encoded with computer-executable instructions, wherein execution of the computer-executable instructions is for:
- generating a serial data stream signal using a synchronous sampled comparator, wherein the synchronous sampled comparator compares a reference voltage and a feedback signal at a sampling frequency and outputs the serial data stream with a switching frequency;
- providing a current to an inductor using power field effect transistors (FETs) to obtain a power supply voltage;
- adjusting the current provided to the inductor using the serial data stream;
- and
- feeding back the power supply voltage to the synchronous sampled comparator.
Dependencies are inferred from the claim text.