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   sci.electronics.design      Electronic circuit design      143,326 messages   

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   Message 141,339 of 143,326   
   Lasse Langwadt to john larkin   
   Re: MMIC filter   
   26 Nov 25 18:09:54   
   
   From: llc@fonz.dk   
      
   On 11/26/25 18:00, john larkin wrote:   
   > On Wed, 26 Nov 2025 16:24:52 GMT, Jan Panteltje    
   > wrote:   
   >   
   >>> Bill Sloman wrote:   
   >>>> On 26/11/2025 8:16 pm, Jan Panteltje wrote:   
   >>>>> "Tom Del Rosso" wrote:   
   >>>>>> john larkin wrote:   
   >>>>>>   
   >>>>>> Good on-chip oscillators would be cool, on uPs and FPGAs.   
   >>>>>   
   >>>>> I have an electric oven that seems to use the on-chip oscillatior. The   
   >>>>> clock gains a few minutes a day. Thay could have omitted the clock and   
   >>>>> no one would miss it.   
   >>>>   
   >>>> On chip oscillators are temperature dependent   
   >>>   
   >>> But some more so that others. I had cheap Casio watch that I bought in   
   >>> the 1980's and it went through three lithium batteries until I managed   
   >>> to leave it in the washing machine a couple of years ago, which wrecked it.   
   >>   
   >> https://casiosupport.zendesk.com/hc/en-us/articles/3600001011   
   2-Quartz-movemCASIO AMERICA, INC. Watches Atomic/WaveCeptor   
   >> All Casio watches have Quartz movements.   
   >>   Quartz-is powered by an electronic oscillator synchronized by quartz   
   crystal.   
   >>   The electric current causes the quartz inside to pulsate with a precise   
   frequency   
   >   
   > Probably all watches now have an off-chip quartz tuning-fork   
   > resonator, usually 2^15 Hz. MEMS resonators are getting pretty good   
   > lately, and the resonator and the oscillator circuit can be on the   
   > same silicon chip, so I expect MEMS watches soon.   
   >   
   > Bulova once made a watch that used a low frequency tuning fork   
   > resonator that directly operated a tiny ratchet.   
   >   
   > Given that everybody carries a phone now, why have a watch?   
   >   
      
   how else are you going to show off how much money you have?   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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