Explain what is happening here ...

[abikutn]

Hello,

Below are two figures that show the output from a Laser Driver Board , running pulses at 80Mhz.

1. The power to the board Vdd and gnd is connected via a DC POWER SUPPLY.

View image: DC Power Supply

2. The second figure is when the Vdd and gnd is connected via a 5V battery.

View image: 5 V Battery Supply

I dont understand the behavior on the shape of the pulse. Why is this happening when it is powered via the Line-> DC power supply ... and ... NOT via battery ...

 

[abikutn]

Guys ! the images are upside down ... sorry ... :kewlpics:

 

[jArdi]

what type of power supply are you using? it might be giving out sine wave pulses ( i would think)

 

[baddspella]

I know its for a dimmer but its using a leading edg wave to lower line current.
There is also trailing edge.

Please Read http://www.ilight.co.uk/downloads/iLIGHT%20Binder-HowDimmers.pdf

for a verry detailed explenation on this type of wave and method of reducing current.

 

[abikutn]

what type of power supply are you using? it might be giving out sine wave pulses ( i would think)

I checked with both (below mentioned ) power supplies:

1. Agilent E3612A

2. TENMA 72-2005 Laboratory DC power supply

 

[abikutn]

I know its for a dimmer but its using a leading edg wave to lower line current.
There is also trailing edge.

Please Read http://www.ilight.co.uk/downloads/iLIGHT%20Binder-HowDimmers.pdf

for a verry detailed explenation on this type of wave and method of reducing current.

Thank you

 

[hakzaw1]

WTH??
I PMed you already about double posting-
You may not agree but I was being nice.

we still need you to fill in your profile and make your intro thread in WELCOME section.

I don't think we are asking too much from you-
you are asking for a lot of help--

plz meet us half-way OK?

 

[HitShane]

Why would a member of this forum send another member a personal message to tell him what to do? Is that not a moderator's job?