Two-wire transmitter starter circuit and two-wire transmitter including the same
US-9214853-B2 · Dec 15, 2015 · US
Soft-start time control circuit
US9013169B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9013169-B2 |
| Application number | US-201313853203-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 29, 2013 |
| Priority date | Apr 16, 2012 |
| Publication date | Apr 21, 2015 |
| Grant date | Apr 21, 2015 |
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Abstract
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A control circuit for controlling a soft-start time of a DC power supply includes a digital potentiometer, a first drive circuit, and a controller. The digital potentiometer includes a first potentiometer. The first drive circuit includes a first driver, a first MOSFET, and a first charge capacitor. The first driver charges the first charge capacitor via the first potentiometer when the DC power supply is first switched on, and the first MOSFET is switched on to connect the DC power supply to the load when the first charge capacitor is fully charged. The controller regulates resistance of the first potentiometer to regulate a charge time constant of the first charge capacitor, enabling a gradual rise in voltage supplied, from approximately zero to full power, within a desired period of time.
First claim
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What is claimed is: 1. A control circuit for controlling a soft-start time of a direct current (DC) power supply, comprising: a digital potentiometer comprising a first potentiometer; a first drive circuit comprising a first driver, a first metal-oxide-semiconductor field-effect transistor (MOSFET), and a first charge capacitor; and a controller electronically connected to the digital potentiometer; wherein the first MOSFET is electronically connected between the output of t…
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Frequently asked questions
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- What does patent US9013169B2 cover?
- A control circuit for controlling a soft-start time of a DC power supply includes a digital potentiometer, a first drive circuit, and a controller. The digital potentiometer includes a first potentiometer. The first drive circuit includes a first driver, a first MOSFET, and a first charge capacitor. The first driver charges the first charge capacitor via the first potentiometer when the DC powe…
- Who is the assignee on this patent?
- Hongfujin Prec Ind Shenzhen, Hon Hai Prec Ind Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G05F3/08. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Apr 21 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).