The limiting performance of a CMOS bistable register based on waveform considerations

Closed-form solutions describing the output response of a CMOS bistable register are presented. From these results, the fundamental latching behavior of a CMOS register is developed in terms of its physical and circuit characteristics. Necessary and sufficient conditions for latching data are described in terms of small signal circuit parameters. From these necessary and sufficient conditions, the limiting condition for latching and the onset of metastability are presented and verified