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 Forum index » DIY Hardware and Software » Rob Hordijk DIY Designs
Benjolin voltage level outputs
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elmegil



Joined: Mar 20, 2012
Posts: 1983
Location: Chicago
Audio files: 16

PostPosted: Sun Jun 26, 2016 2:42 pm    Post subject: Benjolin voltage level outputs Reply with quote  Mark this post and the followings unread

I've built a couple different Benjolins now from a couple different PCBs I've been working on. My peak to peak values are pretty different from each other and I wanted to validate this against someone with a "standard" Benjolin build if you have time to check for me....

Both oscillators' triangle outputs are 7.8 - 8 Vpp. Pulse outputs are 15.2 Vpp.

I know the VCF output is supposed to be line level, so that's 1.6 / 1.7Vpp on my units, totally within spec.

The pulse is generated by a comparator on the triangle, and I'm using TL07X op amps (I actually divided one of the TL074's into two TL072's for spacing things out), so I get the 15.2Vpp since this isn't rail to rail. I just want to be sure that the output of the triangle stage looks right?
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macumbista



Joined: Sep 12, 2007
Posts: 390
Location: berlin
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PostPosted: Tue Jan 17, 2017 9:37 am    Post subject: Reply with quote  Mark this post and the followings unread

Maybe you found this already, but the Epoch Modular Benjolin has the following measurements:

Quote:
The filter outputs go from +2 to -2V, the triangle outs are ±4V, the rungler and XOR are ±5V, the pulses ±8V, and the PWM range is ±8.5V.


Source: http://www.emusician.com/benjolin

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