jrcfg Posted July 21, 2005 Report Share Posted July 21, 2005 I have read many times in various forums that allowing an input to float is a bad idea...that unused inputs should be pulled up or down. I always do just that as a result. Just so I know.... why, specifically, is it a bad idea to float a CMOS input??And feel free to get technical.... ;D Quote Link to comment Share on other sites More sharing options...
audioguru Posted July 22, 2005 Report Share Posted July 22, 2005 Hi Jrcfg,A Cmos input has an extremely high resistance and will:1) Get damaged by any nearby static electricity.2) Capacitively pick-up nearby signals resulting in a wrong or random output.3) Maybe oscillate at a very high frequency if it picks-up its own output.4) Dissipate power because it operates linear instead of logic switching. ;DI only used a little geek-talk! Quote Link to comment Share on other sites More sharing options...
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