Leading modifiers such as "+" or "-" may be used in the keywords to specifically require or exclude search terms. By default, all keywords without a modifier are assumed to have a leading "+". Example: "DAC -power" will return all entries that have "DAC", but do not have "power". The quotation marks here should not be typed when searching for individual words (see below).

Quotation marks can be used to indicate phrases. For example "pipelined converter" searches for entries containing the phrase "pipelined converters".

The search is performed across the following fields: Author name, Title, Abstract, and place of publication.