Use high-frequency circuit according to the circuit characteristics: the smaller the better distribution parameters should be used in metal film resistors, metal oxide film resistors and other high-frequency resistance. Low frequency circuits: winding resistance, carbon film resistors are applicable. Decoupling circuit, filter circuit: The change in resistance is not strictly required, any type resistors are applicable. Power amplifier, bias circuit, sampling circuit: circuit stability requirements are relatively high, should choose low temperature coefficient resistor. Selected according to the choice of resistance resistor values ??and error: the principle is the nominal resistance of resistors and resistor values ??required for the difference between the smaller the better. Error Selection: Error desired time constant RC circuit resistors as small as less than 5% of the general optional decoupling circuit, the feedback circuit filter circuit load circuit is not too high for the error of 10% -20% of the optional resistor. device. According resistor limit parameter selection Rated voltage: When the actual voltage exceeds the rated voltage resistance, even to meet the power requirements of the resistor will be breakdown. Rated power: The selected resistor power rating should be greater than the actual power to bear more than double in order to ensure long-term reliability of the resistor circuit to work in. Forecast, 2014 - 2020 China market size of LED chip will maintain an average growth rate of 11.85 percent per year growth in high-power resistive heating, Chinese LED chip market demand scale in 2020 nearly 17.5 billion yuan. It is understood that since the LED chip industry profits shrink, LED products into parity period, many businesses want to rely on more profitable to expand the scale of high-power thick film resistors, China MOCVD capacity utilization is only about 30% at present, about 50% of power rate Although the downstream market demand is relatively strong lighting, but due to years of capacity expansion and utilization rate is not high, resulting in a huge machine loss, so the future of LED industry mainly to consolidate existing resources mainly to expand production capacity may exist in several major listed probability of a larger company. Power heating resistor resistance _ _ Taiwan Yi Jia Electronics provided by Nanjing-kai Electronics Co., Nanjing-kai Electronics Co., Ltd. (www.eajay.com) strong, credible, in other industries Nanjing accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Yi Jia Electronics into the brilliant and you work for a better future!