transient response in INVERTER

[srini.pes]

Hi to all.,
I have designed one inverter.
The DC characteristic was very good and i checked the output of the circuit
inverter followed by inverter.
INV => INV.

The two outputs were good.

When i gave a pulse to check the transient response, the output was not coming.
it is coming like a spike in positive half (for positive half of input) then reducing and
maintaining a constant (-Ve ) value.

What may be the reason for this error ?

Thanks

SRINI

 

[pancho_hideboo]

No one can answer, unless you show more detail information.

 

[Prashanthanilm]

Depends on the frequency of the input and the variables given.
Provide the image of the waveform with variables given.