INPUT PROTECTION CIRCUITS FOR INTEGRATED CIRCUIT DEVICES

INPUT PROTECTION CIRCUITS FOR INTEGRATED CIRCUIT DEVICES

INPUT PROTECTION CIRCUITS FOR INTEGRATED CIRCUIT DEVICES An input of a CMOS integrated circuit device is protected from excessive voltage swings at an input terminal by a protection circuit which comprises two series-connected protective stages between the input terminal and the device input. Each p...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: WHITING, DAVID R, HINZ, LORNE C
Format: Patent
Sprache:eng ; fre
Schlagworte:
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
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Beschreibung
Zusammenfassung:INPUT PROTECTION CIRCUITS FOR INTEGRATED CIRCUIT DEVICES An input of a CMOS integrated circuit device is protected from excessive voltage swings at an input terminal by a protection circuit which comprises two series-connected protective stages between the input terminal and the device input. Each protective stage comprises a current-limiting series resistor and clamping diodes connected to the supply voltages of the device. The two stages enable the series resistance of the protection circuit to be much lower than that required for a single stage diode clamping arrangement, this being particularly advantageous if the device is an analog-to-digital converter for converting to digital values analog voltages present at the input terminal.