Design of a high speed processor system bus for notebook computers

A 133 MHz processor system bus (PSB) has been designed and developed for notebook computer systems running at core frequency of 500 MHz and beyond based on an enhanced gunning transceiver logic. We described the design flow and highlighted the design challenges unique to notebook computers, It is shown that with careful I/O circuit design, transmission line analysis and reliability consideration, the design target can be achieved. A similar approach can be applied to notebook computers with even higher bus frequency.