Sensing network mismatch compensation for switching voltage regulator with input voltage and current sensing
US-10224812-B1 · Mar 5, 2019 · US
Audio power source with improved efficiency
US10404218B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10404218-B2 |
| Application number | US-201816163208-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 17, 2018 |
| Priority date | Jan 9, 2018 |
| Publication date | Sep 3, 2019 |
| Grant date | Sep 3, 2019 |
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- Title
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Abstract
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One example includes a differential amplifier, a voltage weighting element, coupled to a voltage source which provides an input voltage, to provide a reference voltage with a constant power limit when the input voltage varies, an error amplifier configured to receive and compare the reference voltage provided from the voltage weighting element and a feedback sensed voltage provided from the differential amplifier to identify whether the sensed voltage exceeds the reference voltage, and a pulse width modulation (PWM) controller, coupled to a power transformer and the error amplifier, that reduces a transformer input current provided to the power transformer based on the comparison of the reference voltage from the voltage weighting element and the feedback sensed voltage from the differential amplifier.
First claim
Opening claim text (preview).
What is claimed is: 1. A device comprising: a differential amplifier; a voltage weighting element, coupled to a voltage source which provides an input voltage, to provide a reference voltage with a constant power limit when the input voltage varies; an error amplifier configured to receive and compare the reference voltage provided from the voltage weighting element and a feedback sensed voltage provided from the differential amplifier to identify whether the sensed voltage exceeds the reference voltage; and a pulse width modulation (PWM) controller, coupled to a power transformer and the error amplifier, that reduces a transformer input current provided to the power transformer based on the comparison of the reference voltage from the voltage weighting element and the feedback sensed voltage from the differential amplifier. 2. The device of claim 1 , wherein the voltage weighting element provides the reference voltage based on a voltage decrease to a current limit set point as the input voltage increases. 3. The device of claim 1 , wherein the differential amplifier comprises a low pass filter. 4. The device of claim 1 , wherein the feedback sensed voltage from the differential amplifier is provided from a current sense resistor coupled to the power transformer and the differential amplifier. 5. The device of claim 1 , wherein the power transformer input current is detected by a metal-oxide semiconductor field-effect transistor (MOSFET) transistor switch. 6. The device of claim 1 , wherein when the pulse width modulation (PWM) controller reduces a transformer current provided to the power transformer when the feedback sensed voltage from the differential amplifier exceeds the reference voltage from the voltage weighting element.
Assignees
Inventors
Classifications
with automatic control of output voltage or current, e.g. switching regulators · CPC title
using IC blocks as the active amplifying circuit · CPC title
with semiconductor devices only · CPC title
the amplifier being designed for audio applications · CPC title
with semiconductor devices only · CPC title
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Frequently asked questions
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- What does patent US10404218B2 cover?
- One example includes a differential amplifier, a voltage weighting element, coupled to a voltage source which provides an input voltage, to provide a reference voltage with a constant power limit when the input voltage varies, an error amplifier configured to receive and compare the reference voltage provided from the voltage weighting element and a feedback sensed voltage provided from the dif…
- Who is the assignee on this patent?
- Biamp Sys Llc
- What technology area does this patent fall under?
- Primary CPC classification H03F1/0227. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 03 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).