Monthly Archives: November 2014

AMD will give up the motherboard chipset manufacturer pass outsourcing

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Taiwan ASMedia recently announced that it has signed a partnership agreement with AMD, but has not announced the details, saying only that the technology of the next-generation chipset involved. Earlier there was news that in fact, AMD has developed fully outsourced to ASMedia chipset. Taking into account the current PC processor has integrated most of the original features of the chipset, which has a single cause, then outsourcing can help save a lot of cost and effort AMD APU and focus on developing products semi-custom, then ASMedia can take the opportunity to make a killing.

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According to better understand the new AMD in May this year, when negotiations began and I hope ASMedia Asus Taiwan IC design companies can share with SATA ownership Express Technical Support or sell a license for AMD, as you leave chipset can support this new interface of the drive.

But with the progress of the negotiations, the two sides cooperate lot of depth, ASMedia completely took over the job of developing AMD chipset. According to the roadmap, AMD APU final Carrizo next year will evolve into SoC, no external chipset (or Southbridge), so that the APU platform chipsets have little space to continue to develop.

FX CPU platform is a combination of two fleas traditional north and south of the bridge, but has not been updated for several years of silence, and then the update will probably wait until a new architecture called.

For the image sensor of small size and efficient power supply design

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For automotive camera applications involving digital image sensor supply various design elements. In rain, snow, fog, and other difficult driving conditions, high levels of image quality is essential. Car driver when reversing the degree of dependence on technology is much higher than visual inspection. If a low-noise analog power rail demand, efficiency and size and other major design elements can not be optimized, then the operation in good weather conditions may not be a good solution for harsh weather conditions.

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Design Elements

For automotive camera applications involving digital image sensor supply various design elements. Image quality is an important indicator of whether the application can be profitable class. In rain, snow, fog, and other difficult driving conditions, high levels of image quality is essential. Car driver when reversing the degree of dependence on technology is much higher than visual inspection. If a low-noise analog power rail demand, efficiency and size and other major design elements can not be optimized, then the operation in good weather conditions may not be a good solution for harsh weather conditions.

Advanced Driver Assistance Systems

For example, AptinaAR0132 is a universal sensor with 1.2 million pixels and and 720p60 resolution, support for high dynamic range imaging for automotive advanced driver assistance systems (ADAS) and the surrounding view / parking assist camera applications. Where the kernel (VDD) and I / O section (VDD_IO) require 1.8V voltage, analog part (VAA, VAA_PIX and VDD_PLL) require 2.8V voltage. Obviously, the analog portion of the chip is more easily affected by power line noise. Many designs use a low dropout regulator (LDO) will be downconverted all power from the 5V input rail.

Design goals

The overall objective is to provide a practical embodiment of the power supply system for AR0132AT image sensor, it successfully integrated into automotive applications and packages. Although the details of the other sensors and systems may be different, but the principles discussed in this paper have general applicability.

Size of the image sensor is very important because it must be incorporated into 25 mm cube in which the overall efficiency and good thermal management make high demands. Despite having a low noise LDO output, but its power consumption is high, will the image sensor heating, resulting in adverse effects, so the 25 mm cube in the work is not satisfactory.

Power switching power supply solutions is much lower, but with higher output ripple and noise in nature. In implementing the switching power supply solutions that require additional attention to its image sensor analog input noise power supply rail (ripple) sensitivity.

Design Process

Is designed for image sensor capable of efficient power supply system, it is necessary to know the sensor sensitivity level and switching power supply ripple output in order to take appropriate steps to ripple design on the sensor supply rail drops below the threshold degradation.