News Column

Patent Issued for Start-Up Circuit for an Output Driver

June 4, 2014

By a News Reporter-Staff News Editor at Electronics Newsweekly -- From Alexandria, Virginia, VerticalNews journalists report that a patent by the inventors Ko, Cheng-Ting (Hsinchu, TW); Yu, Tsung-Hsin (Hsinchu, TW), filed on September 28, 2012, was published online on May 20, 2014.

The patent's assignee for patent number 8729935 is Taiwan Semiconductor Manufacturing Company Limited (Hsin-Chu, TW).

News editors obtained the following quote from the background information supplied by the inventors: "Generally, an output driver comprises a metal oxide semiconductor (MOS) transistor and is associated with a delayed response time when the MOS transistor or MOS driver is turned on. For example, the MOS transistor is delayed at least due to a variation in at least one of process, voltage, or temperature (PVT) associated with the output driver. Additionally, the MOS transistor is delayed at least because a gate of the MOS transistor or MOS driver requires time to pull the gate of the MOS to a turn-on voltage. In some scenarios the delay results in a disproportionate rise fall ratio for the output driver. For example, if the delay is associated with a pull down transistor, such as the MOS transistor connected to a pad, a rising time is less than a falling time for the output driver, thus leading to the disproportionate rise fall ratio."

As a supplement to the background information on this patent, VerticalNews correspondents also obtained the inventors' summary information for this patent: "This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to be an extensive overview of the claimed subject matter, identify key factors or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.

"One or more techniques and systems for starting an output driver and an associated start-up circuit for operating the output driver are provided herein. In some embodiments, a voltage provider charges a charge store to a pre-turn-on voltage. The charge store is connected to an output driver such that a metal oxide semiconductor (MOS) transistor or a MOS driver of the output driver receives the charge of the charge store at the pre-turn-on voltage. In some embodiments, the MOS driver is configured to control a voltage of a pad based on the connection from the charge store to the output driver.

"The following description and annexed drawings set forth certain illustrative aspects and implementations. These are indicative of but a few of the various ways in which one or more aspects are employed. Other aspects, advantages, or novel features of the disclosure will become apparent from the following detailed description when considered in conjunction with the annexed drawings."

For additional information on this patent, see: Ko, Cheng-Ting; Yu, Tsung-Hsin. Start-Up Circuit for an Output Driver. U.S. Patent Number 8729935, filed September 28, 2012, and published online on May 20, 2014. Patent URL:

Keywords for this news article include: Electronics, Taiwan Semiconductor Manufacturing Company Limited.

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Source: Electronics Newsweekly

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