The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Measurements >> Other Measurements >> how to generate a negative voltage during test
https://designers-guide.org/forum/YaBB.pl?num=1253501884

Message started by trashbox on Sep 20^th, 2009, 7:58pm

Title: how to generate a negative voltage during test
Post by trashbox on Sep 20^th, 2009, 7:58pm

I need to add a negative voltage on the PCB for my circuit, the average output current is about 80mA. Except the charge pump chip, how can I realize a negative voltage with simple method?

Thanks in advance!
Trashbox

Title: Re: how to generate a negative voltage during test
Post by loose-electron on Jan 8^th, 2010, 1:49pm

a separate negative power supply
an oscillator generator and an isolation transformer
a capacitive charge pump
A solar cell and a bright light (just kidding) :P

Title: Re: how to generate a negative voltage during test
Post by love_analog on Apr 20^th, 2010, 8:12am

You can easily use a negative buck boost. This way it is also easy to change the voltage later on (by changing duty cycle)