drain (redirected from controlled drain)

drain

One side of a field effect transistor. When the gate is pulsed, current flows from the source to the drain, or vice versa depending on the design. See collector.

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drain

1. a pipe or channel that carries off water, sewage, etc.

2. Surgery a device, such as a tube, for insertion into a wound, incision, or bodily cavity to drain off pus, etc.

3. Electronics the electrode region in a field-effect transistor into which majority carriers flow from the interelectrode conductivity channel

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(jargon)

drain - (IBM) To allow a system to complete the processing of its current work before the system becomes unavailable. E.g. draining a device before taking it off-line or telling a web server in a server farm not to accept any new requests but to finish processing any requests it has already accepted.