>>> Exactly. But to get the same speed, meaning same signal >>> impedence, you would need 1.2Kohms since >>> 2Kohm // 3Kohm =3D 1.2Kohm. >> >> On rising edge I don't see how does mentioned in your calcs >> 3Kohm divider's bottom resistor help to speed the rising. > > This is very basic electronics. =A0Look up something called > "Thevenin Equivalent". Interesting, obviously, removing the bottom resistor from the divider would increase the speed of rising (assuming inputs would tolerate it). But, according to your logic/formula removing the bottom resistor would increase impedance and, thus, decrease the speed of rising. >>> Once again, there is no inherently better approach, >>> so please stop making it sound like yours is. >> >> Do you really want ME to adjust the sound? This kind of perception >> depends on a listener, not on a speaker. > > I want you and everyone else to stick to good engineering practises. > Absolute statements about one approach always being better than another w= hen > there are clearly tradeoffs envolved is superstition, not engineering. Aha, I see, the problem is that I ommited the magic word "COULD". Ok, if I had written " It COULD be much better to synch to sharp falling edge" - would the rest hold true about FET + resistor to VERY PROBABLY be better than the divider in many designs? -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist