Questions tagged [quartz]

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Load frequency calculation of quartz with its load capacitance

After web researches and a first discussion about general comprehension, I am a bit lost with the load frequency calculation: I see a design which uses two 33pF external capacitors (C1 and C2),with a ...
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1answer
60 views

Crystal frequencies

the context is that I am working on project which uses a 32 768 Hz quartz oscillator used for a uC. My questions are: I have read that series resistance should be low (25 to 100 Ohm) otherwise it can ...
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66 views

Output Impedance of a DIP8 Crystal Oscillator

I would like to make a module for OOK transmission using a generic DIP8 Crystal Oscillator, and this is what I currently have. How is the output impedance of a Crystal Oscillator determined?
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41 views

Negative frequency deviation in crystal oscillator

What is the significance of a negative frequency deviation in the freq deviation vs temperature profile of a typical OXCO (e.g. the diagram seen on this page)? My understanding is that a positive ...
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32 views

How to flash ATtiny85 with clock quartz (32khz) again?

I flashed ATtiny85 once with simple program blinking for 1 second. F_CPU = 32768. I set low fuse byte to 0xe6 with avrdude. According to datasheet 6 = 0b0110 CKSEL is intended for low frequency quartz ...
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145 views

How to use 4 pin crystal with power?

I have a KXO-V97T 8MHz crystal. It looks like it's an unusual crystal. The datasheet contains the following pinout: 1 - h or open 2 - GND 3 - OUTPUT 4 - VCC A crystal with VCC? I am surprised. The ...
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82 views

starting material for silicon production

Where does silicon semiconductor manufacturing start from? I mean, what are the principal ores that may be used to start the technological process and what extraction process is used? (And what are ...
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188 views

What is the current through a parallel LC tank circuit in its resonant frequency?

I read that in a quartz crystal: For a series-resonant crystal, the crystal current is the RMS voltage across the crystal divided by the crystal internal series resistance. Meanwhile, for a parallel-...
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101 views

The Piezoelectric Effect on Natural Quartz Crystals

Background I have recently started doing a lot of research on the piezoelectric effect with the hopes of gaining a better understanding of the topic. When I can I like to do experiments on top of ...
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1answer
77 views

How does a crystal oscillator work? [closed]

What I already know is that they are used as a frequency generator when they are stimulated at their own resonance frequency. But when I have to tune the applied voltage to that certain frequency, why ...
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3answers
77 views

Quartz Crystal with or without metal lid for EMI suppression?

Is there any reason for choosing a quartz crystal with or without metal lid? Some datasheets (this one for instance: link) claim better EMI performance and other do not write at all about it. So is ...