(Forked from the debouncer thread)
On 2020-08-13 16:26, John Larkin wrote: > On Thu, 13 Aug 2020 12:43:51 -0400, Phil Hobbs > wrote: > >> On 2020-08-13 12:06, snipped-for-privacy@highlandsniptechnology.com wrote: >>> On Thu, 13 Aug 2020 11:24:05 -0400, Phil Hobbs >>> wrote: >>> >>>> On 2020-08-13 06:24, Don Y wrote: >>>>> On 8/13/2020 2:43 AM, Pimpom wrote: >>>>>> On 8/13/2020 12:18 PM, Don Y wrote: >>>>>>> On 8/12/2020 11:22 PM, Pimpom wrote: >>>>>>>> On 8/12/2020 9:13 PM, snipped-for-privacy@highlandsniptechnology.com >>>>>>>> wrote: >>>>>>>>> Why do you need to debounce? >>>>>>>>> >>>>>>>> Nothing specific at the moment. I just want to have a stock >>>>>>>> standalone solution for future applications. >>>>>>> >>>>>>> So, you're going to FIX the cost and capabilities of that >>>>>>> "solution" without concern for the needs of those "future >>>>>>> applications"??? >>>>>>> >>>>>>> >>>>>> >>>>>> I don't understand the head shaking. Anyone who designs >>>>>> circuits regularly will have their favourite solution for a >>>>>> common task. I've used various debouncing techniques but they >>>>>> all require passive components, a particular type of switch, >>>>>> and in some cases another active device to complement the main >>>>>> active devices. >>>>>> >>>>>> If there's an inexpensive standalone part that needs no >>>>>> external parts and can replace those techniques in most >>>>>> applications, what's wrong with using that as a stock >>>>>> solution? A 2N3904/BC547 transistor can be used at the heart of >>>>>> a wide range of low frequency low power applications. Why hunt >>>>>> for a suitable type every time? >>>>> >>>>> What do you do when you need a greater Icc? Do you have your >>>>> "favorite FET"? >>>> >>>> I sure do. Besides the late lamented BF862 (of which I have >>>> several reels), there's the CPH3910 and my new fave, the Mini >>>> Circuits SAV-551+, which (with a bit of circuit magic) makes the >>>> world's finest bootstraps. >>> >>> >>> SAV-551 is a great switch to ground too. 2 ohms, half a pF. Good for >>> steering current, discharging ramps, changing gain, or switching >>> caps in and out. It only needs a half volt or so of gate swing, but >>> you can drive it from bigger stuff with just a series gate resistor. >> >> Have you tried the new 18-GHz Renesas pHEMT parts as switches? They >> wouldn't have much chance to oscillate in that service. > > I didn't know about them. Got a part number that you like?
I haven't used them yet, but I'll get some to try.
There are several nice ones here, and DK has zillions of them.
Cheers
Phil Hobbs