Since i couldnt make the schmitt trigger output duty cycle similar to the center frequency, i used the 556 timer in astable mode and gave its output to input(pin3) of 567.

I used a scope and checked the duty cycle and time period of 556 output and found that matching with the center frequency(pin5) of 567.
Yet, iam getting only a pulse output at pin8 of 567.

I dont have an Ex-OR gate right now to give the two signals(556 output and 567 center frequency) to it and check the output response. I would possibly do that.

Basically my intention on perfoming the above test is to achieve in getting HIGH/LOW logic state before/during touch of capsense.

So, once i am able to get the required output from the Ex-OR gate (logic LOW before touch and pulses during touch), i have planned to give that to an SR NAND latch with its 'R' input inverted.

This NAND latch acts as a debounce circuit and maintain a constant logic LOW state at 'Q' output during the pulse output from EX-OR gate. Otherwise the 'Q' output will be HIGH.

This is the concept iam trying and would get back if i see success.

Suresh.