Timing circuits.

555 timer applications sourcebook, with experiments Berlin, Howard M. 1978 Electronic switching, timing, and pulse circuits Pettit, Joseph M. 1970 Electronic switching, timing, and pulse circuits Pettit, Joseph M. 1970 Modeling embedded systems and SoC's Jantsch, Axel 2004 Modeling embedded systems and SoC's Jantsch, Axel 2004