D38999/26ZJ61AE_Datasheet PDF

 人参与 | 时间:2021-06-20 02:17:05

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Sometimes I feel that the success that IC vendors have had at packing amazingly good performance and useful features into power-supply regulator ICs — whether low dropout (LDO) or a switcher — has worked against them.

Why? As a result of doing such a good job, these critical components often don't get the attention, consideration, or respect they should. After all, without these regulators, most designs would be struggling, trying to work properly with power rails that had the wrong local characteristics (nominal voltage, noise, accuracy, configuration, etc.), even when sufficient bulk power was available on the board.

D38999/26ZJ61AE_Datasheet PDF

Click to read the rest of this article on Planet Analog.

WASHINGTON — With a 2006 deadline for completing the transition to digital TV all but certain to be missed, Congress is now looking for ways to make broadcasters either pay for broadcast spectrum or return it.

During a Senate Commerce Committee hearing on the digital TV transition held Thursday (March 1), broadcasters conceded the deadline would likely slip. The 2006 deadline is going to be very hard to hit,” said Jeff Sagansky, president and chief executive of TV station owner Paxson Communications Corp.

D38999/26ZJ61AE_Datasheet PDF

Industry observers agreed. Nobody seriously thinks there's going to be a 2006 switch over” to all-digital broadcasting as mandated by Congress, said Tom Hazlett of the American Enterprise Institute, based here.

Broadcasters' failure to speed the transition to digital TV is angering lawmakers and resurrecting complaints of a spectrum giveaway” to broadcasters. Sen. John McCain, R-Ariz., the Commerce Committee's chairman, has long sought to force broadcasters to pay for new digital channels while returning analog spectrum. Thus far, McCain has failed.

D38999/26ZJ61AE_Datasheet PDF

Now, other lawmakers and the Bush administration are proposing that broadcasters pay for spectrum. One proposal is to make broadcaster rent” analog spectrum if as expected they miss the 2006 switch-over deadline. In return for the free digital TV licenses, broadcasters agreed earlier to return their analog spectrum by 2006, or when 85 percent of U.S. households received digital broadcasts.

While sales of digital receivers have reached more than 600,000, industry analysts said the real obstacle to reaching the 85 percent penetration rate expected by Congress is a lack of digital set-top boxes needed to convert digital signals for display on existing analog sets. Without more, affordable set-tops, the 2006 deadline is basically not going to happen,” said James Gattuso, vice president for policy and management at the Competitive Enterprise Institute.

Last summer, University of Cambridge PhD candidate Sergei Skorobogatov and fellow research Christopher Woods reported in an academic paper that they had discovered a backdoor in Microsemi/Actel ProASIC3 FPGA chips. The paper said that the researchers had used a technique called pipeline emission analysis to extract a key to the back door.

Military vulnerabilities According to Skorobogatov:

If you use this key you can disable the chip or reprogram it at will, even if locked by the user with their own key. This particular chip is prevalent in many systems from weapons, nuclear power plants to public transport. In other words, this backdoor access could be turned into an advanced Stuxnet weapon to attack potentially millions of systems.

The paper caused a flurry of concern because the ProASIC FPGAs are reportedly widely used in military systems, flight control, and industrial and automotive applications. But Microsemi (which acquired Actel in 2010) says that what the researchers found was not a backdoor, but rather an integral part of the chip’s security. In order to access the information — pre-programmed data such as the unique ID of the device and other data necessary for the production, manufacturing, and testing of the device — a hacker would have to break into the chip’s first-line security, or the front door, first, says Paul Ekas, vice president of marketing for SOC products at Microsemi.

Click to read the rest of this article on EBN.

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