A ceramic resonator used as a frequency source. The bar of piezoelectric ceramic is driven to oscillate by the chip below. The natural resonant frequency of the bar is tuned to the desired frequency via laser milling, which are the two groves in the top of the bar. The entire device is fairly tiny. ~1cm long.
Details of the laser milling:
Some fun details, mostly because I like textures:
Ceramic Resonator
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Re: Ceramic Resonator
Interesting!
Do you know what the frequency and precision/accuracy/stability of the device is?
What is the application?
--Rik
Do you know what the frequency and precision/accuracy/stability of the device is?
What is the application?
--Rik
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Re: Ceramic Resonator
An interesting piece, nicely photographed. The concept/illustration of laser milling is intriguing. What is the (presumably) conductive material used to make the various electrical connections? It doesn't look like solder.
Leonard
Leonard
Re: Ceramic Resonator
Nice series, and I like the technical explanation.
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Re: Ceramic Resonator
Not entirely. I believe these were from a T1 interface board that had 4 of these. Two were 32768 Hz devices, and the other two were whatever the fundamental clock for a T1 is ( 1.5...MHz? ) from boards in Nortel PBX equipment.rjlittlefield wrote: ↑Fri Aug 13, 2021 3:35 pmDo you know what the frequency and precision/accuracy/stability of the device is?
-- Bob
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Re: Ceramic Resonator
"T1" as in the 1.544 megabits/sec telecommunication channels? I have fond memories of those things, but the memories are from very long ago!
--Rik
--Rik