Clock-Signal (Synchronous Circuits) - How is it done?

Question

Please, in layman terms... but try to explain all the details.

What components can be used to create the clock? And then how is it hooked up to the logic transistors to make a synchronous circuit?

Answer 1

to create clock signal quartz crystal is used. it triggers ckt depending on duty cycle. you can generate clock from various ic like ic 555. can give various duty cycle depending on requirement

Answer 2

There's a nice document on clock generation at http://www.ti.com/lsds/ti/analog/clocksandtimers/clocks_and_timers.page?DCMP=TIHeaderTracking&HQS=Other+OT+hdr_p_clocks



Clocks are usually generated from a quartz crystal source and sometimes from a ceramic resonator. These are the most stable clock sources. Clocks using PLLs have a quartz crystal oscillator as the reference frequency. You can make free running clocks with either logic gates or the likes of a 555 timer but there will be the potential of clock timing errors (drift) of 2% or more, jitter and phase noise and should only be used in non-critical circuits.

Answer 3

google piezoelectricity . read up on the crystals.