Kevin Weddle Posted October 27, 2010 Report Share Posted October 27, 2010 A circuit based on a 1KHz clock has a longer pulse transistion time than a 10Khz clock. But couldn't it have the same transistion time? Is there a circuit to reduce pulse transistion time and make a low frequency digital circuit perform better? Quote Link to comment Share on other sites More sharing options...
audioguru Posted October 28, 2010 Report Share Posted October 28, 2010 Use a logic inverter, gate or counter that has a Schmitt-trigger input.A CD4017 decade counter made by Texas Instruments has a clock input that has a Schmitt-trigger. Its clock rise and fall times are allowed to be unlimited. Quote Link to comment Share on other sites More sharing options...
Kevin Weddle Posted October 28, 2010 Author Report Share Posted October 28, 2010 Thank you audioguru. Although Schmitt triggered digital devices seem more reliable, isn't it a form of positive feedback that prevents noise from switching the device? Quote Link to comment Share on other sites More sharing options...
audioguru Posted October 29, 2010 Report Share Posted October 29, 2010 A Schmitt trigger has an upper trigger voltage and a lower trigger voltage caused by positive feedback. Voltages from noise that are in between do not have any affect. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.