I am just checking whether it can convert single dc voltage or not. Thanks for replay.Can you please post your simulation circuit here??
It will be of great help. You are correct though ttl high means we should get around -3 to -25 on T2 out .
And viceversa for R1 in and R1out. Please can you spot where I am making mistake in the circuit .Please do post your circuit .It will be of great help . Thanks.