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Subject: Re: buffer

Date: 12/09/02 at 4:00 PM
Posted by: John Dunn - Consultant
E-mail: ambertec@ieee.org
Message Posted:

In Reply to: buffer posted by arga on 12/09/02 at 12:01 PM:

Hello, Arga.

The word "buffer" has more than one meaning.

In the analog sense, a buffer is an amplifier stage, such as a voltage follower that prevents changes in the properties of a load from being experienced by a signal source. The signal source is said to be "buffered: from the load.

In the digital sense, a buffer can be a set of memory elements into which data is tranfered en masse from another device, a counter or a shift register perhaps, so that all of the bits of the data transfer are made to appear simultaneously at the next device to which those signals are to be passed.

Also in the digital sense, a buffer can be a single input and single output logic gate that allows drive to be passed on to another device where that other device would be too demanding in its signal input requirements to be fed from the logic circuitry from which the data signals originated.

In other words, to understand the meaning of "buffer", you have to conisder the context in which the word is used.

Good luck.

John Dunn

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