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XCO3.php 4570 Bytes 06-03-2025 12:51:13
XCO3 - A low cost Crystal Oscillator Module
For any standard 7 x 5 mm Oscillator
The assembled prototype
✈ Motivation • Design Criteria
On one hand, we wanted a calibrated Source for the EMC-Precompliance Setup.
On the other hand, a Source to study the Harmonics of a Standard Crystal Oscillator
was desirable.
This is a board to house any 7 x 5 mm Crystal Oscillator. A Voltage Regulator supplies it with a stable 3.3 V / 5 V, max. 100 mA. We used the SO-8 78LXX type Voltage Regulator for that.
In order to use 50 Ω Measurement Gear, a massive Output Divider (30 dB) does this matching thing, without loading the Oscillator too much.
This is a board to house any 7 x 5 mm Crystal Oscillator. A Voltage Regulator supplies it with a stable 3.3 V / 5 V, max. 100 mA. We used the SO-8 78LXX type Voltage Regulator for that.
In order to use 50 Ω Measurement Gear, a massive Output Divider (30 dB) does this matching thing, without loading the Oscillator too much.
✈ Downloads
✈ Performance • 4.096 MHz
The CMOS oscillator creates beautiful Harmonics (FSP is 50Ω)
Whilst in the time domain it is close to a squarewave (SCOPE is Hi-Z)
✈ Share your thoughts
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t1 = 7299 d
t2 = 331 ms |
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