Methods and apparatus for trimming electrical devices

Trimming methods and apparatus are disclosed for selectively removing resistance between first and second nodes in an electrical device, including trim circuits comprising a resistor and a diode formed in the resistor body having a conductive portion which may be selectively melted to short the resi...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ROMAS, JR. GREGORY G, WANG JIAN
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:Trimming methods and apparatus are disclosed for selectively removing resistance between first and second nodes in an electrical device, including trim circuits comprising a resistor and a diode formed in the resistor body having a conductive portion which may be selectively melted to short the resistor. A multi-bit trim cell is disclosed having trim cells individually comprising a resistor with a diode formed in the resistor body for selectively shorting the resistor, and a fuse for selectively disconnecting the diode from a trim pad.