Author Topic: adding noise to HV circuit  (Read 170 times)

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Online TheBaconWizard

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adding noise to HV circuit
« on: March 08, 2018, 03:35:09 am »
I am providing pulsed 600v DC to a 500khz tank oscillator which of course rings with a sine wave.

I would like to make that sine wave "dirty" but do not want to make it into a saw-tooth or square wave..  simply "fuzzy"  as if there were some vhf interference on it, but still a sine.

I don't mind dropping some of the voltage, so I was wondering about putting a few reverse-biased zener diodes in the circuit for noise.

Will that work? Any better ideas?
 

Offline BrianHG

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Re: adding noise to HV circuit
« Reply #1 on: March 08, 2018, 06:18:53 am »
Where is this 600khz pulse coming from?
Are you generating it from an MCU?
Are you trying to create a spread-spectrum noise in your oscillator to weaken it's effect on radio broadcasts?
__________
BrianHG.
 

Online TheBaconWizard

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Re: adding noise to HV circuit
« Reply #2 on: March 08, 2018, 09:04:33 am »
The initial pulse is being provided by a 555 timer and amplified to the voltage needed.

The Tank Oscillator takes the 600v pulse and then does it's job: Oscillating at 500kHz until losses cause it to stop (except there will be another pulse before then)

I have attached 2 oscillagrams. You will see one is quite pure and the other is a bit dirtier. I want the dirtier version, possibly more dirty than the example I have given.




 


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