Loking for dual clocking chip

[StephenGiles]

Can anyone suggest a chip which provides either 2 independent squarewaves, or one square wave which is available as either a modulated or unmodulated output - all of which, with suitable buffering would be suitable for driving BBDs?

 

[jdbakker]

-ENOTENOUGHDATA

Could you tell us more about:

- the required frequency range
- how much you need to be able to change the frequencies
- the relationship between the two square waves
- how much modulation depth you need
- the required duty cycle (ratio of on-time vs off-time)
- the available supply voltages
- the required amplitude of the square wave

?

Without more info I can say little more than 'look for the data sheet of the NE555 (single) / NE556 (double), or the 74HC4060, or use the internal pulse width modulation generators of an ATTiny26 if you're any good with microcontrollers'.

HTH,

JDB.

 

[adamasd]

-ENOTENOUGHDATA

I think it is safe to say he wants to make an audio delay effect since he is talking BBD, which means he did give plenty of data. Most BBDs want to see pretty much the same thing for a clock.

NE556 can do the job, 4060 seems kinda a goofy way to go, but you could do some fun things with it, sequenced delays? The CD4046 PLL can do lots of fun stuff for modulating BBDs. CD4047 or the panasonic clock chips tend to be the standard for this, neither will do what you want, though.

adam