Wow, yes. This is such a great concept, and something I’ve been wondering about actualizing (I’d love to understand the circuit better). Anhwhooo… definitely getting one. Question… this works with any triangle/saw wave, yah (not just H and V-syncd ramps)? I hope to use it with oscillographics. Cheers!
It is based out of Saw Animator kind of circuit made for audio, it is usually multiple of this circuit that are used to phase shift a sawtooth/ramp signal and sum it with the original signal to make it sound "fatter". It works quite well for video, though it generates a little glitch where the two parts of the shifted waveform joins. As this is basically how it works: - the input signal is sent to a comparator, that generates a pulse out of the ramp - this pulse is summed with the inverted input signal - once the pulse is high, it adds an offset to the ramp signal, which shifts it upward, and "moves" when the falling edge of the ramp in time. - the reference of the comparator that change the pulsewidth will act on the amount of phase shift of the output waveform, and this same voltage reference is summed with the output signal to bring it back in the useable range (0-1V) Not sure if the text description makes a lot of sense, then you can check the circuit simulation linked in the user/build guide: tinyurl.com/yh9kbffj And yes, it does work with any signal, though the "phase shift" (which is more of a level shift) is effective only with ramp/saw signals, with triangle it does shift both ways from the center of the waveform (as shown around 3:20), should be similar with a sinewave iirc, then it doesn't do much with a square/pulse, as it is then summed with the comparator output which also produce a square. It does work with an external video signal too, giving a level shifting (which is then clipped at encoder stage), here I'm using two VU008 to process R, G and B channel of an external video source: instagram.com/p/CaemAWkl2h0/ instagram.com/p/Caj4eWJulX0/ About oscillographics, I tried it to modulate H and V ramps used to display an external video signal and the result is quite interesting: ua-cam.com/video/cofK5joB500/v-deo.html
@@syntonie1487 thank you so much for the details about the circuit! And for the links to the other examples. Do you know if the phase shift on the LZX Staircase works similarly?
Really liking this one!
hell yea
Wow, yes. This is such a great concept, and something I’ve been wondering about actualizing (I’d love to understand the circuit better). Anhwhooo… definitely getting one. Question… this works with any triangle/saw wave, yah (not just H and V-syncd ramps)?
I hope to use it with oscillographics.
Cheers!
It is based out of Saw Animator kind of circuit made for audio, it is usually multiple of this circuit that are used to phase shift a sawtooth/ramp signal and sum it with the original signal to make it sound "fatter". It works quite well for video, though it generates a little glitch where the two parts of the shifted waveform joins.
As this is basically how it works:
- the input signal is sent to a comparator, that generates a pulse out of the ramp
- this pulse is summed with the inverted input signal
- once the pulse is high, it adds an offset to the ramp signal, which shifts it upward, and "moves" when the falling edge of the ramp in time.
- the reference of the comparator that change the pulsewidth will act on the amount of phase shift of the output waveform, and this same voltage reference is summed with the output signal to bring it back in the useable range (0-1V)
Not sure if the text description makes a lot of sense, then you can check the circuit simulation linked in the user/build guide:
tinyurl.com/yh9kbffj
And yes, it does work with any signal, though the "phase shift" (which is more of a level shift) is effective only with ramp/saw signals, with triangle it does shift both ways from the center of the waveform (as shown around 3:20), should be similar with a sinewave iirc, then it doesn't do much with a square/pulse, as it is then summed with the comparator output which also produce a square.
It does work with an external video signal too, giving a level shifting (which is then clipped at encoder stage), here I'm using two VU008 to process R, G and B channel of an external video source:
instagram.com/p/CaemAWkl2h0/
instagram.com/p/Caj4eWJulX0/
About oscillographics, I tried it to modulate H and V ramps used to display an external video signal and the result is quite interesting:
ua-cam.com/video/cofK5joB500/v-deo.html
@@syntonie1487 thank you so much for the details about the circuit! And for the links to the other examples. Do you know if the phase shift on the LZX Staircase works similarly?