In addition to the use of digital circuit mode, many systems still use analog circuit adjust the transmission time: laptop battery baseband code sent via analog trigger circuit, and ranging error control via analog baseband code trigger circuit transmission time. In this way, in theory, the step of adjusting transmission timing is smaller, but compared with the digital circuit, easily affected by temperature, noise, and other factors, the reliability is much less. The proposed method is implemented with a digital way, stability and reliability has incomparable superiority.

    This design of the shaping filter full use of the hardware resources left in the ROM, the logical unit takes up very little. The shaping filter is composed of a shaping filter set can be Baseband transmission time step size is reduced to a fraction of the clock cycle, or one of a dozen points, thus greatly improve the accuracy of the transmission timing adjustment . This design has been applied to a ranging system, laptop battery has achieved good results. This design can also be applied in many other ranging systems, such as positioning systems, secondary radar, etc., so a higher practical value.

the ROM output filter result is C code baseband filtering result value intermediate code. the calculated E R falls in a range which. Select the sub-interval waveform, the waveform to the sub D / A converter into an analog waveform and then outputs the notebook battery can adjust the transmission time of the clock cycle steps down to 1 / E. the system clock frequency is 20MHz, so the code 2MHz baseband interpolation between adjacent bits "0", then step (C preferably 5) of the FIR filter shaping filter device can be achieved. the waveform value of quantization bits, each base band code number of sampling points clocks of other factors.

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Event Review: 2007 National Torch Plan ningjin solar silicon materials industry base and Jinzhou silicon materials and solar cell industry base formally. March, Sichuan Xinguang Silicon 1,000 tons of polysilicon projects, trial success. September Tianhong Silicon polysilicon project foundation. June, aerospace electromechanical construction in Inner Mongolia, 1,500 tons of polysilicon production plant. July Ningbo Electronic Information Industry Group subsidiary Solar Co., Ltd. Ningbo Jingyuan additional 70 million yuan investment to expand the production of polycrystalline silicon films. August LDK polysilicon plant broke ground.

Investment boom surging domestic polysilicon production capacity gradually released, Comments: This photovoltaic project swarm phenomenon is a good thing is still hard conclusion. Behind the boom in investment in polysilicon, we have to see the domestic polysilicon technology there are many deficiencies. we do not bother to participate in the forefront of technology, competition, and should be committed to addressing the current problems faced, down to earth to do something in front; there may be some investors and entrepreneurs temporarily remains on the sidelines. But for the international mainstream manufacturers.

Although many domestic enterprises have begun to address this area, or further expand production capacity, however, due to technological backwardness, development of polysilicon is also facing many problems. World polysilicon main producing countries are actively seeking new techniques and new technologies. The R & D work is very active, and the emergence of many new achievements and technological breakthroughs. This also indicates that the industrialized world's polysilicon production technology, a new leap forward is coming. China's polysilicon industry in order to seize this opportunity, we need a major breakthrough in technology.

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whether the shell expansion, bubbling or deformed, rushed to open the safety valve, and the capacitance and leakage current (leakage current, the capacitor will overheat , laptop battery causing red open safety valve, even capacitor explosion), pressure testing, etc., on the capacity was reduced by 30%, and leakage current exceeds 70mA, voltage below 650V capacitor should be replaced. The new capacitor or long idle unused capacitor performance tests should be carried out to meet the requirements before they can be used interchangeably. Improve the use of the environment and load frequency fluctuation phenomenon,

(8) for the rectifier, inverter GTR (or IGBT) and other large carrying capacity of the device to use a multimeter, power bridges Instruments | instrumentation, hardware | tools for detection and pressure test to measure the forward and reverse resistance value and do form to record the difference between the larger parameter module to be replaced.(9) the main contacts and other auxiliary relay examination, careful observation of the contacts of the contactor without pulling movement fox, burrs or surface oxidation, uneven, found that such problems should contact the corresponding replacement movement, to ensure its contact with safe and reliable.

(10) Always check the power supply voltage fluctuation level.  avoid large current impulse of the drive.The application of the drive, only to meet their design requirements and the conditions of normal use, in order to make long-term, safe and stable operation. Laptop battery if it is in poor working environments, we must pay particular attention to the drive routine maintenance and repair work to improve the environment and the inverter load fluctuation phenomenon. In order to ensure that the inverter reliable, stable, safe to play its performance, to achieve speed control operation, save energy and reduce maintenance costs purposes.

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It is worth mentioning that, austriamicrosystems CT scanners and X-ray medical imaging detectors such products provide a high-performance ASIC solutions. CT of the former launched optical power per channel Interface ASIC is 8mW, also uses ultra-low temperature drift (typical drift of 4ppm / K) design, and special pad structure, In the latter introduced a charge sensitive readout amplifier, capable of simultaneously (in parallel) reads out the pixels of the panel line 120 and 120 corresponding to the charge voltage of the analog memory using a complex multiplexing, high linearity, low noise products model.

To meet the portable medical electronics like mobile phones or consumer electronics, like the demand for ultra-low power, Zarlink (Zarlink) last year, the company introduced the ZL70100 ultra low-power wireless transceiver chip. Laptop battery This device is fully developed to meet FCC and ETSI MICS standards. The ultra-low-power communications company marketing director Peter Putnam said: "still no other similar commercial ZL70100 transceiver chip can reach provided by high data rates, low power consumption and high performance level of integration." Putnam: the future of medical devices will be further integrated wireless communications.     

He explained that Zarlink's ultra low-power RF technology can support within two meters high 500kb / s data transmission. In contrast, the previously implanted device communication system relies on the body coil and the magnetic coupling between the base station, just a 10 cm working distance range, the data transfer rate is only tens of kb / s. "Soon, we will launch the second generation of higher-performance devices. Application of this technology include implantable pacemakers, defibrillators, nerve stimulators, implantable glucose sensor and drug pump." He continued .

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In the low dielectric (low-k) dielectric insulation technology, multi-core, High-K of these cutting-edge technology a one completed, we should be concerned about the problem of a breakthrough power it? After completing a set of energy-efficient system, architecture design, software, hardware, power | voltage regulator has a kind of control and management of the correlation between, and how to contribute to the strength of each? Many participants laptop battery at the chip level semiconductor manufacturers are under enough energy research effort. Google, Yahoo is also building data centers around the world.

    ONSemiconductor (ON Semiconductor) Audio Solutions Company Head MichelDeMey said: "In the design process, the understanding of the application is the key to select the appropriate architecture and semiconductor device development process, a reasonable software and hardware division, the use of appropriate algorithms in reducing energy consumption are important aspects. "This requires vendors at different levels of product integration. Especially when the design turned 45 nanometer process nodes,  the new architecture can not increase under the conditions of the process to reduce energy consumption.

Cadence developed CadenceLow-PowerSolution is a logical design, verification and implementation techniques and Si2 approved CommonPowerFormat (CPF) a combination of complete process. Marketing director at Cadence Low-Power MohitBhatnagar analysis, said: "In the center of the grid and the green data center cooling costs are more than the device itself, half the cost of these semiconductor devices for cooling energy consumption." To reduce the energy consumption of the chip, to achieve power required objectives, design teams are increasingly adopting advanced power management techniques, such as multi-supply voltage (MSV) and power shut-off (PSO).

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TPMS's life in general to reach 8 to 10 years, which alone a 500mAh battery (battery capacity over the General Assembly to increase the volume and weight transmitter module) transmitter is designed to maintain the work really is not a small problem. In addition to hardware circuit design power consumption is minimal outside, TPMS transmitter firmware design is very important in ensuring the reliability of the system requirements of the premise, the transmitter sensor measurements, RF data transmission times must be strictly controlled. Therefore, designers often have to system reliability and life requirements for optimization contradiction.

8020 TPMS sensor based on the design, taking into account the transmitter interrupt wake up the MCU to 3s work the way, most of the time the transmitter module in a power saving state, so the power-saving state designed to meet 0.6uA less power, while in the experiments under extreme battery life of the transmitter based on the number of launches statistics, theoretical calculations of the TPMS system life up to 10 years. TPMS transmitter module to be loaded inside the tire, the volume is not too large, too much will tire installation, removal caused a big problem; Second, the transmitter module's weight should be very light, otherwise it will affect tire balancing.

Direct TPMS systems in product design in the face many difficulties. As automotive safety products, should pay more attention to its system failure analysis. With TPMS technology continues to evolve, the new TPMS technology solutions are becoming more integrated, especially the sensor, MCU, transmitter circuit integrated, not only the transmitter module are smaller, lighter, and its performance, function others have greatly improved, such as the increase of LF, LVD, acceleration test and other functions, even through CAN bus with the TPMS system is connected to the vehicle electronic systems, in order to achieve information sharing.


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using different cathode materials, new lithium-ion batteries have started to develop. When using this type of battery pack, the design engineer should observe electrical specification limits and adjust the drive circuit. Using the maximum forward voltage of the LED is 3.4V ~ 4V when the input voltage provided by the battery must be equal to or higher than the required drive voltage, and therefore requires a stable current function of the boost converter in series or to promote connected in parallel to the LED. with the use of inductive step-up conversion solution compared to the charge pump drive circuit due to its low cost.

Charge pump converter is widely used on the LCD backlight driver, thin thickness and low noise characteristics and a a better choice, the new IC design has gradually improved the efficiency of the charge pump drive circuit,  Charge pump drive circuit is usually taken 1x and 2x mode of operation, some devices are added to 1.33x and 1.5x mode to improve efficiency in this type of solution, LED connected in parallel, the laptop battery at the same time each LED current is set by separate matching current source, optimum drive circuits on the same chip LED current between any two matching error of about 0.2%.

In portable devices, the keyboard or touch screen, when used in the LED current when the highest, and in a few seconds without action, to reduce power consumption will reduce the LED current, the LED current control is a common approach is to use PWM pulses to drive the chip enable, through startup and shutdown the chip, the output current is the average of the PWM signal duty cycle. For new LED driver chips, the use of a single (S-Wire) or two wire I2C interface, so just use one or two I / O ports, and thus the design is very simple. the highest efficiency of over 93%, while the average efficiency of approximately 80%.

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Traces the temperature rise can be applied continuously determines the maximum safe current value. Alignment with variable width and alignment sensitivity can get the best combination of temperature rise. The temperature of copper is limited to the PCB material has a glass transition temperature (135 ℃), and the maximum operating temperature of Minisens 125 ℃. For a margin of safety considerations, it is best to take the line of work at temperatures lower than 115 ℃ (UL recommends no more than 100 ℃). In order to maintain the temperature level, the trace width, thickness and shape are very important.

For small current (less than 10A), is recommended to do a few laps primary alignment to increase the magnetic field generated by the primary current. On a single trace, Minisens best to walk around the line width greater than the width of the bottom trace (to reduce the temperature rise). We call this design is called "multi-turn."High insulation from the improved creepage distance and isolation spacing, because the primary conductor (four laps to go line) in low voltage electronic components located opposite the PCB. In this case, to ensure that two distances are 8mm (PCB features: 1.6mm/70μm Cu) (track width: Minisens under 0.78mm, other places 3mm).

Other techniques can be used to further increase the sensitivity, as in the above Minisens with a "jumper" and the PCB traces form a loop, or between different PCB layers multiple laps. Measuring large current, transmitter can be positioned in a place far away from the primary conductor.Many parameters can be Minisens nonvolatile memory chip for configuration. They can be used to adjust the transmitter gain, offset, polarity, temperature drift and gain algorithm (proportional to VDD or irrelevant).a sensitivity of 130mV / A, for 15A current output generated voltage of 2V.

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The Global Resources Pei grams believes that this would mean that in this round exit cold, the Chinese supply strength triage situation has been formed, "Those high-quality Chinese suppliers can take the opportunity to expand their exports, to secure better buyers; Meanwhile, those small, relatively poor competitive suppliers would be more sad day. " Mazhen Xiong further revealed that, for CircuitCity, the first half of this year, the store operated by Sony, Panasonic and other "expensive" first-line brand product sales in decline, while "CircuitCity" own-brand product sales but in straight up.

Well-being of exports of electronic products, manufactured in China largely determines the direction of the current round of crisis, and a way out.According to the Ministry statistics, from January to April this year, China's electronics exports have been hit relatively weak: laptop battery Chinese electronic information products exports 159.31 billion U.S. dollars, an increase of 22%; higher than the same period last year 3.6 percentage points, lower than the national export growth rate 0.5 percentage points, but still the country's total foreign trade volume reached a high of 37.5%.

In his view, "China is currently in the electronics industry has formed a good vertical integration, transport and logistics, as well as sophisticated technical workers, this is not a short-term replacement of other countries can."Pepples also told reporters: "a buyer tells us that in their shopping list, only a product in Asian countries other than China to find." He also pointed out that although the product itself is no price electronics space, but It also forced many Chinese electronics supplier through technological upgrading, through diversified design and accelerate the rate of replacement to improve competitive advantage.

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Fifth, the quality level is low. This is China's Lighting Industry of the important defects. March 15, 2007, SAIC laptop batteries sold on the market of energy-saving lamps products quality monitoring carried out, with a pass rate was 39.3%; November AQSIQ announced the results of energy-saving lamp product quality sampling, sample pass rate 59.7%. May Shaanxi Provincial Quality Supervision Bureau in the province-wide energy-saving lighting products for supervision, pass rate 38%; three quarters of Sichuan Trade and Industry Bureau of sales in some areas of quality energy-saving lamps were monitored.

 with a pass rate of only 20% ; October Guangdong Province, Guangzhou Industrial and Commercial Bureau checks the quality of energy-saving lamps market 50 percent pass rate. April AQSIQ announced on fixed general purpose luminaires product quality sampling results, product sample pass rate of 83.9%; October Tianjin Quality Supervision Bureau, the city sold 20 batches portable luminaires supervision and spot checks, sample pass rate was 35%. August, quality supervision department of Zhongshan Guzhen Lighting Enterprises conducted a quality survey and found that 69 lighting companies falsely 3C.

Lighting a matter of fact, personal safety, and quality standards should be higher, but it should guarantee 100% pass rate. Quality level is low for many reasons, many enterprises are mainly paid insufficient attention to the relevant laws and regulations are not strictly adhered to, there is the level of business due to technical problems, it is difficult to achieve industry-related quality standards, even for the relevant provisions of the standard quality is simply do not understand. This will lead to a large number of laptop battery unqualified products into the market. accelerate the improvement of national standards.

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