BOSOZ Output Waveform Question

hifimaker · 8th April 2007, 02:34 AM

I hooked up a 1khz 1vdc waveform generator to the input of my BOSOZ and measured the output before the attenuator.

The output is a 4.5 volt square wave. The bottom of the square wave is rounded. (See attached picture)

The output from the signal generator is nice and square 1khz waveform on my scope.

Any ideas for how I should adjust the BOSOZ to square up the signal?

Thank you!

-David

Fox · 8th April 2007, 08:55 AM

Did you measure the output with less input voltage? The BOSOZ works best when fed with a signal between 0,3 and 0,6 Volt. Perhaps 1 Volt is a little too much.

Just my two cents,

Fox

Babowana · 8th April 2007, 12:41 PM

Quote:

Originally posted by dw8083

Any ideas for how I should adjust the BOSOZ to square up the signal?

I have thin idea about the square wave things. Nevertheless, the asymmetric edge rounding looks very unusual. The asymmetry explains that the internal capacitance of the amp seems to have different rates in charging and dischaging time--really unusual.

Did you check the sq. wave at 10kHz too?

hifimaker · 8th April 2007, 04:29 PM

Here's the output with a 1khz .6vdc square wave. Scope is set to 1volt per division.

Top trace is BOSOZ output, bottom trace is the waveform generator.

hifimaker · 8th April 2007, 04:31 PM

Here's the output with a 10khz .6vdc square wave. Scope is set to 1volt per division.

Top trace is BOSOZ output, bottom trace is the waveform generator.

Thank you for any insights!

-David

hifimaker · 8th April 2007, 05:12 PM

DOH! My bad. I did not connect the - Neg phase of the balanced input to ground. After ground the neg input the waveform is nice and square!

10khz .6vdc square wave on the pos input, neg input grounded.

-David

Zen Mod · 8th April 2007, 07:37 PM

Quote:

Originally posted by dw8083
DOH! My bad. I did not connect the - Neg phase of the balanced input to ground. After ground the neg input the waveform is nice and square!

10khz .6vdc square wave on the pos input, neg input grounded.

-David

typical mistake-when someone choose to power up brain instead ears..................

Babowana · 9th April 2007, 01:18 AM

^^.

My mistake rate is rather high in one per ten measurements.
But, only once with the same kind . . .

mpmarino · 9th April 2007, 01:34 AM

Quote:

Originally posted by Babowana
^^.

My mistake rate is rather high in one per ten measurements.
But, only once with the same kind . . .

1 in 10 - hey that's pretty good.

I screw it up everytime, especially when it has a zener in it somewhere.

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8th April 2007, 08:55 AM	#2
Fox diyAudio Member Join Date: Dec 2002 Location: The Netherlands	Did you measure the output with less input voltage? The BOSOZ works best when fed with a signal between 0,3 and 0,6 Volt. Perhaps 1 Volt is a little too much. Just my two cents, Fox

9th April 2007, 01:18 AM	#8
Babowana Formerly "jh6you". R.I.P. Join Date: Jul 2006	^^. My mistake rate is rather high in one per ten measurements. But, only once with the same kind . . .

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