The first problem that we encounter with FETs and gate driving, is that we must understand that the gate of a FET is effectively a capacitor, so we need a "high" current driver to switch the FET On and to switch the FET Off by discharging. A CD4093 being a CMOS device, does not have the capability to switch the FET On/OFF, and hence the issues you are experiencing. A pull up or open collector driver will not work well.

I suggest using a gate driver device such as TC4420 or TC4427 or IRF2104 or IRF2011, etc. Use the FET data sheet when calculating the Gate to ensure that it is with in the specifications. A series resistor of 47 ohms will probably be with in the specifications, and reduce ringing. You can do a search on half bridge drivers, and check that are available at your local supplier. For the specific application any device will work. It will also make sense to read up the data sheets and information on how to drive FETs from manufacturers such as ST, Onsemi, Infineon, Fairchild, Microchip, Maxim, Toshiba, and other suppliers. Power switching is a field on its own, and understanding the switching devices will ensure better working and switching circuits.

Secondly, and I am not sure what the application is, and this may be a SMPS using fly back as its function, so the 50% duty cycle may not be a consequence, but adding the diode, will severely affect the operation of the SMPS, as the switching the inductor off or discharging the inductor is the primary option of the circuit which the diode will prevent.

The use of snubber circuits usually comes about because of incorrect switching, and inductors or inductance which may be incorrect for the application. It may also occur on lightly loaded secondaries, where the charging/discharging current in the inductor is not suppressed due to the light load. Applications to reduce the high pulse are designed around the power electronics application.

If you wish to get a perfect 50% duty cycle, then I would use an oscillator driving a Flip Flop such as CD4013 or a CD4027 or equivalent. Drive at twice the frequency required, and you will get a perfect 50% duty cycle irrespective of the quality of the driving oscillator.

Giving a bit more information in the application will yield better suggestions.

 

The first problem that we encounter with FETs and gate driving, is that we must understand that the gate of a FET is effectively a capacitor, so we need a "high" current driver to switch the FET On and to switch the FET Off by discharging. A CD4093 being a CMOS device, does not have the capability to switch the FET On/OFF, and hence the issues you are experiencing. A pull up or open collector driver will not work well.

I suggest using a gate driver device such as TC4420 or TC4427 or IRF2104 or IRF2011, etc. Use the FET data sheet when calculating the Gate to ensure that it is with in the specifications. A series resistor of 47 ohms will probably be with in the specifications, and reduce ringing. You can do a search on half bridge drivers, and check that are available at your local supplier. For the specific application any device will work. It will also make sense to read up the data sheets and information on how to drive FETs from manufacturers such as ST, Onsemi, Infineon, Fairchild, Microchip, Maxim, Toshiba, and other suppliers. Power switching is a field on its own, and understanding the switching devices will ensure better working and switching circuits.

Secondly, and I am not sure what the application is, and this may be a SMPS using fly back as its function, so the 50% duty cycle may not be a consequence, but adding the diode, will severely affect the operation of the SMPS, as the switching the inductor off or discharging the inductor is the primary option of the circuit which the diode will prevent.

The use of snubber circuits usually comes about because of incorrect switching, and inductors or inductance which may be incorrect for the application. It may also occur on lightly loaded secondaries, where the charging/discharging current in the inductor is not suppressed due to the light load. Applications to reduce the high pulse are designed around the power electronics application.

If you wish to get a perfect 50% duty cycle, then I would use an oscillator driving a Flip Flop such as CD4013 or a CD4027 or equivalent. Drive at twice the frequency required, and you will get a perfect 50% duty cycle irrespective of the quality of the driving oscillator.

Giving a bit more information in the application will yield better suggestions.

would a TL4426 work instead of TC4420?

 

would a TL4426 work instead of TC4420?

I think this is a typo TL4426, I think you meant TC4426.
Yes it will work in this case, because the inversion of the control signal is not an issue.
With future projects you may get involved in, inversion of your control signal may be an issue, so look out for this fact when selecting a driver.