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INFINEON TECHNOLOGIES (IFX)
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Infineon Technologies : Patent Issued for High Speed Tracking Dual Direction Current Sense System (USPTO 9798347)

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11/02/2017 | 09:53pm CET

By a News Reporter-Staff News Editor at Journal of Engineering -- Infineon Technologies Austria AG (Villach, AT) has been issued patent number 9798347, according to news reporting originating out of Alexandria, Virginia, by VerticalNews editors.

The patent's inventors are Sambucco, Adriano (Villach, AT); Norling, Karl (Villach, AT).

This patent was filed on October 30, 2014 and was published online on October 24, 2017.

From the background information supplied by the inventors, news correspondents obtained the following quote: "A tracking current sense circuit typically provides a tracking current and may be used in applications such as DC-DC converters for server and mobile computer applications. Conventional tracking current sense circuits often include an operational amplifier which has a limited slew rate and a limited bandwidth due to capacitances that are introduced for stability. Using an operational amplifier results in the tracking current sense circuit having a low limit speed, and thus may not be able to sink or source current with speeds that is sometimes required by modern technologies/systems."

Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "In general, this disclosure describes techniques and circuits for improving the speed, bandwidth, and stability of tracking current sense systems. Some of the techniques and circuits described herein enable a tracking current sense system to pre-bias the current of an inactive side of a half bridge such that the level of the current at the inactive side is at or near a level of an operating current when the inactive side of the half bridge later becomes active. In this manner, pre-biasing the inactive side of a half bridge may reduce the amount of settling time that occurs when a side of the half bridge is activated.

"Some of the techniques and circuits described herein may enable a tracking current sense system to track positive and negative currents. For example, using a zero-current crossing comparator to detect a change in polarity of a current or by using an offset current generator that is set to supply the maximum negative current that could be required.

"Some of the techniques and circuits described herein may enable a tracking current sense system to track positive and negative currents regardless of which side of a half bridge is active. As such, the tracking current sense system may track positive and negative currents in both the high and low side switches of the half-bridge.

"In some examples, the techniques of the disclosure are directed to a tracking current sense system that includes a current source and a current control device. The current source alternatively and substantially replicates a first current flowing through a first switch and a second current flowing through a second switch. The current control device configures the current source to alternate between replicating the first current and the second current.

"In some examples, the techniques of the disclosure are directed to a current control device configured to control a current source of a tracking current system. The tracking current sense system alternatively and substantially replicates a first current flowing through a first switch and a second current flowing through a second switch.

"In some examples, the techniques of the disclosure are directed to a tracking current sense system that includes means for determining whether a first switch is conducting a first current or a second switch is conducting a second current and means for configuring a current source to smoothly transition from replicating the second current to replicating the first current after determining that the second switch is no longer conducting the second current. The tracking current sense system further includes means for configuring the current source to smoothly transition from replicating the first current to replicating the second current after determining that the first switch is no longer conducting the first current.

"The details of one or more examples and techniques of this disclosure are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the disclosure will be apparent from the description and drawings, and from the claims."

For the URL and additional information on this patent, see: Sambucco, Adriano; Norling, Karl. High Speed Tracking Dual Direction Current Sense System. U.S. Patent Number 9798347, filed October 30, 2014, and published online on October 24, 2017. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9798347.PN.&OS=PN/9798347RS=PN/9798347

Keywords for this news article include: Infineon Technologies Austria AG.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2017, NewsRx LLC

(c) 2017 NewsRx LLC, source Science Newsletters

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