4Hz Bilateral Oscillator 60V Some Help Please

[Zak28]

Here I have a very low frequency (4Hz) square wave oscillator, its oscillation fidelity is not impressive although I am new to circuit design.

Looking for advice/suggestions/considerations to:
1. Improve wave fidelity.
2. 0Shift and 180shift nets ramp 0V to 60V




Any help will be greatly appreciated.

 

[KlausST]

Hi,

What does "fidelity" mean:
* voltage levels
* match in rise and fall time
* absolute frequency
* frequency jitter
.....

My recommendation:
* Build an 8Hz clock with single supply (more easy, don't care about duty cycle)
* connect a T-FF or D-FF to the output (they need to have Q as well as Q_n outputs) as a 2:1 frequency divider
* with each output drive a bjt in open collector connection, pullup at collector, collector = output

This gives exact 50% duty cycle and 0V / 60V output levels.

Klaus

 

[Zak28]

Just realised oscillator is NOT 4Hz =/

 

[KlausST]

Hi,

yes, it´s a little bit more than 5Hz.

Again my request on your specifications...

Klaus

 

[c_mitra]

2. 0Shift and 180shift nets ramp 0V to 60V.

You want a triangular wave (ramp up and down or only one way)? Or a sawtooth?