Browse Prior Art Database

Multipurpose Interface Circuit

IP.com Disclosure Number: IPCOM000084808D
Original Publication Date: 1976-Jan-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Gani, VL: AUTHOR [+2]

Abstract

The multipurpose interface circuit depicted in the drawing may be employed in off-chip drive applications where a relatively large voltage transition is required. The output of this circuit provides both pull-up and pull-down drive and may be inhibited to allow dotting at the output node.

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Multipurpose Interface Circuit

The multipurpose interface circuit depicted in the drawing may be employed in off-chip drive applications where a relatively large voltage transition is required. The output of this circuit provides both pull-up and pull-down drive and may be inhibited to allow dotting at the output node.

Resistors R1 are current limiters whose valves are chosen to provide sufficient base drive for PNP transistors T3, T4 and T5. Resistor R2 provides base drive for PNP transistor T6. Ample base drive is available for low-beta transistors.

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