Schottky or normal diode for protection?

[Vague]

Hi
I notice that in some of the PI designs a schottky diode is used as a protection diode across the coil instead of a 1N4148. The forward voltage drop across the schottky will be less than that across the 1N4148 but the response will be quicker. Which is the better solution?
Thank you

[kt315]

what you say on two non-schottky in serial in some designs?
have you to have some RANGE in that you will catch your signal? right? if you use two diodes so you INCREASE the signal in TWO time... and can go near to begin of delta impulse.

[Carl-NC]

I've not seen Schottky diodes offer any real speed improvements for this function. Hard to beat the 4148s.

[Vague]

Thank you these replies are helpful

[bklein]

How about a tbs diode?
Ever tried a variable gain/attenuation circuit timed off the tx release?

[bklein]

make that "TVS" diode...

[jon-ecm]

I have had better results with Schottky diodes

I have had better results with Schottky diodes but not a whole lot of difference, capacitance makes more difference.

I personally believe Schottky diodes are tougher but that might just be me

[chemelec]

Hi
I notice that in some of the PI designs a schottky diode is used as a protection diode across the coil instead of a 1N4148. The forward voltage drop across the schottky will be less than that across the 1N4148 but the response will be quicker. Which is the better solution?
Thank you

Do you mean Diodes actually across the coil?
OR do you mean the diodes used to Protect the First Op-Amp from High voltage Spikes?

[Vague]

Sorry I actually mean the diodes to protect the opamp

[Taktyk]

These diodes are 1N4148 such a standard, like the zener diode - just about the low noise OPAMP protection against high voltage.