Motorola V998、L2000手机各部分工作原理基本相同。供电电源及音频处理模块主要由一块GCAP*(Audio Interface and Power Control U900)芯片完成,U900是一个多功能的芯片,除为手机供电外,还在U700 OR U800(CPU)控制下,对信号进行无线均...Motorola V998、L2000手机各部分工作原理基本相同。供电电源及音频处理模块主要由一块GCAP*(Audio Interface and Power Control U900)芯片完成,U900是一个多功能的芯片,除为手机供电外,还在U700 OR U800(CPU)控制下,对信号进行无线均衡、信道解码、PCM解码、D/A转换、模拟放大等处理;EPROM和EEPROM主要由一块16 Mbit U701芯片完成;展开更多
The radar power supplies exhibit a complex electronics. The development of more and more compact systems leads to master the interaction between different parts of the power supply while reducing electronic circuits, ...The radar power supplies exhibit a complex electronics. The development of more and more compact systems leads to master the interaction between different parts of the power supply while reducing electronic circuits, magnetic and thermal couplings from the constitutive circuitry. The consideration of these phenomena is very difficult at the design of the power supply. This paper presents two complementary methods based first on a circuitry model for the quantification of heat sources and secondly on finite element model for heat diffusion. This approach can help a designer in the goal of improving the performances and thermal stability of radar tied to the supply circuit subset.展开更多
文摘Motorola V998、L2000手机各部分工作原理基本相同。供电电源及音频处理模块主要由一块GCAP*(Audio Interface and Power Control U900)芯片完成,U900是一个多功能的芯片,除为手机供电外,还在U700 OR U800(CPU)控制下,对信号进行无线均衡、信道解码、PCM解码、D/A转换、模拟放大等处理;EPROM和EEPROM主要由一块16 Mbit U701芯片完成;
文摘The radar power supplies exhibit a complex electronics. The development of more and more compact systems leads to master the interaction between different parts of the power supply while reducing electronic circuits, magnetic and thermal couplings from the constitutive circuitry. The consideration of these phenomena is very difficult at the design of the power supply. This paper presents two complementary methods based first on a circuitry model for the quantification of heat sources and secondly on finite element model for heat diffusion. This approach can help a designer in the goal of improving the performances and thermal stability of radar tied to the supply circuit subset.
