76.8 KHz quartz oscillator

[tomeo.gonzales]

I have an old quartz crystal with the frequency 76.8 KHz.
I want to build a simple sinusoidal oscillator with it using MOSFETS (I have  some 2N7000 for this project)
Please help me with a circuit diagram.
I don't find anything useful after searching on Internet.

[Cerebus]

Search for "Hartley crystal oscillator" or "Colpitts crystal oscillator" and you'll be inundated with stuff to choose from.

[JPortici]

"crystal oscillator circuit" will point you to an app note by jim williams

[edavid]

I have an old quartz crystal with the frequency 76.8 KHz.
I want to build a simple sinusoidal oscillator with it using MOSFETS (I have  some 2N7000 for this project)
Please help me with a circuit diagram.
I don't find anything useful after searching on Internet.

If it's actually an old crystal, in a large, flat metal can, look for 100kHz crystal oscillator schematics - close enough.

(If instead it's a tiny cylinder, look for 32kHz schematics instead.)

You will find some circuits using bipolar transistors... they can be adapted to 2N7000s... you may need to adjust the biasing.  It's probably better just to buy some bipolar transistors though.

There is no such thing as a "simple sinusoidal oscillator".  To get a good sine wave, you need AGC, which is not really simple.

As a compromise, you can take the oscillator output from the output side of the crystal (usually using an emitter/source follower so as not to load it).  That waveform is filtered by the crystal, so it is close to a sine wave.

[tomeo.gonzales]

If it's actually an old crystal, in a large, flat metal can, look for 100kHz crystal oscillator schematics - close enough.
(If instead it's a tiny cylinder, look for 32kHz schematics instead.)
You will find some circuits using bipolar transistors... they can be adapted to 2N7000s... you may need to adjust the biasing.  It's probably better just to buy some bipolar transistors though.
There is no such thing as a "simple sinusoidal oscillator".  To get a good sine wave, you need AGC, which is not really simple.
As a compromise, you can take the oscillator output from the output side of the crystal (usually using an emitter/source follower so as not to load it).  That waveform is filtered by the crystal, so it is close to a sine wave.

Thank you edavid. Its a crystal made in 1968 in the former Soviet Union. Build in a glass enclosure like a vacuum tube with the quartz visible. I want to use it for the nice retro look. I found a simple circuit with JFET 2N5484 designed for 100Khz.