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Momentary power supply for doorbell

Is it possible to add a capacitor to a 16v doorbell transformer so that when the power goes off due to a momentary power outage/brown out, there is uninterrupted power going to the doorbell?
 
It is possible that your doorbell is AC, which eliminates the use of a capacitor, in any case that most likely would be good for one shot only, if DC bell, it might pay to look at a rechargeable battery backup.
M.
 
Hello Minder,

Thank you for the reply. It is a 120v to 16v AC transformer. I was trying to avoid the battery backup route (UPS) because it is in an attic and I’d prefer not to deal with battery replacement maintenance.
 
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