Here we are the Intel PCA (Personal Internet Client) architecture IDS to look smart phone hardware architecture.
Multimedia accelerators for smart phones, like the year dedicated graphics accelerator card on the PC, and as such, NVIDIA and ATI graphics chip manufacturers are also two positive development of smart phones, multimedia accelerator. However, only top smartphones with multimedia accelerators, smart phones tend to have a full-screen video playback and 3D graphics MPEG2/MPEG4 processing. Currently, the computing performance of smart phones is growing rapidly. Intel made the smart phone processor development is "2M/2m": 2M that MIPS (performance units) and Mbits (storage unit); 2m, said milliwatts (power units) and millimetter (volume units), the development trend requires 2M the bigger the better, that smart phones have a stronger performance and greater storage capacity, and 2m is the smaller the better, so smart phones use less power, smaller.
Application processor needs five points: performance, including multi-media multi-tasking performance and task execution performance. Cost, including chip cost, on-chip memory cost and consumption. Power, standby power consumption and implementation tasks. Scalability, performance, headroom, development-oriented operating system, co-JAVA support. Application development, hardware and software compatibility, third-party support, design tools and support services. Application processor design has three major schools, a large school is a single ARM processor core plus an array, the other big schools for the ARM core + DSP. There is a large school is to use gate-level logic circuit design. Phone features more diverse, more intelligent, a strong core for smart phones is essential. Currently has more high-end multimedia smart phones typically use more high-performance OMAP family of processors, and wireless transmission module of this series will be removed from the CPU, for use only as mobile computing, PDA, or for more performance with special need to phone.
Lin 'for the Lout + △ Lout when the input level, Lin "for the Lout - △ Lout when the input level input level back to Lin (dBm), reducing the repeater gain to a minimum, read this repeater when the output level Loutmin (dBm), repeater gain adjustment range: △ G = Lout - Loutmin (dB) (3). rated output power should be considered when measuring the output port to the power meter repeater input port attenuation. There are many other indicators are statements of power on the factory test and, therefore, declare the maximum output power of the factory, they should consider other indicators (such as intermodulation, spurious emissions, etc.) effects. The workshop needs to renew some equipments of machining Cell Phone Jammers .
Should maximize the use of sweep test, a network analyzer (vector network, standard network) can also be used to track the source with a spectrum analyzer, the proposed recommendations which, because of its large dynamic range, can also reduce the variety of test instruments, cost savings. Connected to the source track, the center frequency repeater transferred to the measured center frequency, sweep width transferred to the repeater bandwidth measured 3-7 times (depending on the bandwidth may be measured, when a narrow bandwidth of multiple high), output transferred to the measured level repeater input level Lin.
No comments:
Post a Comment