Analog circuit design methodology in a low power RISC microprocessor

There are various kinds of analog CMOS circuits in microprocessors. IOs, cl ock distribution circuits including PLL, memories are the main analog circu its. The circuit techniques to achieve low power dissipation combined with high performance in newest prototype chip in the Super H RISC engines are d escribed. A TLB delay can be decreased by using a CAM with a differential a mplifier to generate the match signal. The accelerator circuit also helps t o speed up the TLB circuit, enabling single-cycle operation. A fabricated 9 6-mm(2) test chip with the super H architecture using 0.35-mu m four metal CMOS technology is capable of 167-MHz operation at 300 Dhrystone MIPS with 2.0-W power dissipation.