Generatin square waveform using ttl

[mtijijoy]

I need to generate a square waveform with 30% duty cycle having +/-5volt peak voltages by using a ttl circuits

 

[tusemo]

Is it allowed to use microcontroller ?

 

[mtijijoy]

No..actually i need to convert a square wave of o to 5volt to +/-5volt wave form ...

 

[crutschow]

You can't readily do that with TTL chips.

What is the maximum frequency of the square-wave?

 

[mtijijoy]

between 715khz to 1 mhz

 

[fareen]

use 555 timer that can do that

 

[crutschow]

You could use a high speed comparator, such as one of these, operating from ±5V supplies. Bias the negative input to about +1.5V. Feed the TTL signal to the positive input.

You may need to add some hysteresis to the positive input to avoid oscillations during the waveform transition.