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From: john larkin <jl@glen--canyon.com>
Newsgroups: sci.electronics.design
Subject: Re: BAW
Date: Wed, 22 Jan 2025 17:09:29 -0800
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On Thu, 23 Jan 2025 00:55:25 +0000, Cursitor Doom <cd@notformail.com>
wrote:

>On Wed, 22 Jan 2025 10:55:39 -0800, john larkin <jl@glen--canyon.com>
>wrote:
>
>>On Wed, 22 Jan 2025 18:07:06 +0000, Cursitor Doom <cd@notformail.com>
>>wrote:
>>
>>>On Mon, 20 Jan 2025 16:26:10 -0800, john larkin <JL@gct.com> wrote:
>>>
>>>>On Mon, 20 Jan 2025 19:52:03 -0000 (UTC), Phil Hobbs
>>>><pcdhSpamMeSenseless@electrooptical.net> wrote:
>>>>
>>>>>john larkin <jl@glen--canyon.com> wrote:
>>>>>> https://www.ti.com/product/CDC6C
>>>>>> 
>>>>>> These are like 35 cents at 1K.
>>>>>> 
>>>>>> 
>>>>>
>>>>>Of course a crystal oscillator is a BAW device too. ;)
>>>>>
>>>>>Cheers 
>>>>>
>>>>>Phil Hobbs 
>>>>
>>>>Don't get technical with me!
>>>>
>>>>I wonder if it's all silicon, a sort of bulk MEMS thing. The price is
>>>>absurd. I guess every one has to be trimmed to frequency.
>>>
>>>Phil's pretty good in that regard. There are some people who see
>>>everything in terms of equations and use higher mathematics to explain
>>>their function. A xtal oscillator would provide a very simple example
>>>for such persons to exhibit this (most unfortunate) character trait.
>>
>>Phil is one of those people who can see equations in motion. I can't.
>>I operate on instinct and simulation.
>>
>>We have brainstormed on some pretty important projects and generated
>>some ideas that influence most everyone here. The skills are
>>complementary.
>>
>>His book is good to have if you design electro-optics or low-level
>>analog stuff.
>>
>>https://www.amazon.com/Building-Electro-Optical-Systems-Making-Applied/dp/1119438977/ref=sr_1_fkmr0_1?crid=3M9PG1T68443R&dib=eyJ2IjoiMSJ9.xIlGO_AWviZZRYMlHFKJuNzKnLc8MDBpUjgE7RsYsDk.WiFCuc8GjBlGtPimMCFx0kOu5NieBv0TzXDNCokyLQM&dib_tag=se&keywords=phil+hobbs+optics&qid=1737571796&s=books&sprefix=phil+hobbs+optics%2Cstripbooks%2C138&sr=1-1-fkmr0
>>
>>Be cautioned that there are equations.
>
>Equations are fine (unavoidable anyway) in this science. But it's not
>helpful in the first instance to gain an intuitive idea of how
>something works - unless you're one of the people I mentioned above.
>This is my main issue with Tom Lee's otherwise superb book, 'Planar
>Microwave Engineering' where he typically launches into higher
>mathematics almost from the get-go.

I have that book. It's mostly useless. One equation will be a full
page of fine print, and then the next page turns out to be one term of
that equation.