CHARGE-TRANSFER TOUCH SENSOR QUERY

Hi All

For our ongoing project we  are using  QT113H-D.We made one PCB in that
we have provided   3 rounds of copper strip with  80 mil  as a
electrode . And also X76 Series (0.1 uF)capacitor  across SNS1 and SNS2
pins to increase the sensitivity. I want to increase the sensitivity
with this  set up, now i am able to  achieve a sensitivity of about 4
Inches . What should i do in this setup to increase the sensitivity to
around 12 inches.Please help me regarding this issue.

Thanks and regards
D.N.Patil

"patil" <dnpatil@gmail.com> a &#4294967295;crit dans le message de news: 
1126613009.873679.195230@g47g2000cwa.googlegroups.com...
> Hi All
>
> For our ongoing project we  are using  QT113H-D.We made one PCB in that
> we have provided   3 rounds of copper strip with  80 mil  as a
> electrode . And also X76 Series (0.1 uF)capacitor  across SNS1 and SNS2
> pins to increase the sensitivity. I want to increase the sensitivity
> with this  set up, now i am able to  achieve a sensitivity of about 4
> Inches . What should i do in this setup to increase the sensitivity to
> around 12 inches.Please help me regarding this issue.
>
> Thanks and regards
> D.N.Patil

As far as I know the only reasonnable way would be to use a larger sensor. 
However I dought you will be able to get a good result up to 12 inches. May 
be connecting the circuit ground to a "good" ground could also help.

Yours,
Robert