A 16 bit stereo audio novel stability fifth-order ∑△ A/D converter that consists of switched capacitor ∑△ modulators, a decimation filter, and a bandgap circuit is proposed. A method for the stabilization of a high order single stage ∑△ modulator is also proposed. A new multistage comb filter is used for the front end decimation filter. The ∑△ A/D converter achieves a peak SNR of 96dB and a dynamic range of 96dB. The ADC was implemented in 0. 5μm 5V CMOS technology. The chip die area occupies only 4. 1mm × 2.4mm and dissipates 90mW.
I:C设计已经进入系统芯片(system on a chip,SoC)时代。片上总线作为SoC集成系统的互连结构,可以解决各个IP功能模块间的相互通信问题。AMBA总线由于其高性能和ARM处理器的广泛应用以及该总线协议的完全开放性,逐渐成为事实上的SoC总线标准。对现有的微处理器IP核按照AMBA ASB片上总线的协议进行改造,使其能够作为主设备方便的集成在SoC系统中,并使用FPGA验证了基于AMBA总线的系统集成的正确性。
