Mobile Audio Amplifier Chip Design

This text has designed a kind of new-type amplifier of power of audio frequency, the purpose is that the chip is put for designing the of good performance single passway low consumption audio frequency work , this circuit is applied to such electronic products as personal computer, portable consumer products, automatic loudspeaker and the toy, game machine ,etc. extensively.Still have temperature that protects the circuit within the power amplification chip of this audio frequency, can realize shutting off the function hotly , the effective one carries on temperature to protect; In addition circuit this is it is it have electric course screech that appear often to suppress to have still; This performance in other respects of circuit is superior to the early like product too, for instance, the power is suppressed than PSRR, such performance as distorted THD +N of wave in harmony ,etc. are better, this circuit still has low consumption that shuts off the mode, when the circuit is under shutting off the mode, shut off electric current to be little, effective consumption of savingDesign work of this text, mainly consult some documents, use the design experience of the foreign similar advanced products for reference at the same time , carry on systematic research to audio frequency system and audio frequency structure and function that work set free, the characteristic designed for CMOS simulation integrated circuit in the circuit design, consider such factors as the efficiency, consumption, area ,etc. synthetically, select the proper circuit form or its combining structure for use, in order to meet the designing requirement. On this basis, the craft characteristic and requirement of comprehensive simulation CMOS, design and adopt and go to China's 0.6um 2P2M Analog CMOS craft, the emulation of the circuit adopts Cadence Spetre to design emulation and optimize, the domain adopts Tanner L-edit to edit and prove.