Browse Prior Art Database

Double Regulation Supply Circuit

IP.com Disclosure Number: IPCOM000051138D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 20K

Publishing Venue

IBM

Related People

Wells, TL: AUTHOR

Abstract

A two-step regulation arrangement provides protection to load circuits in the event of a single regulator device failure and shares the regulator dissipation energy between two regulator devices.

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Double Regulation Supply Circuit

A two-step regulation arrangement provides protection to load circuits in the event of a single regulator device failure and shares the regulator dissipation energy between two regulator devices.

Two regulating transistors T1 and T2 are connected in series with a bulk voltage source. The regulation transistor T1 is closest to the load and is supplied at its base with a fine regulation signal S(F) that is referenced to the desired load voltage and tends to shut off the regulation transistor T1 as the actual load voltage V(L) rises above the desired value. The regulation transistor T2 is closest to the source of bulk voltage (V(BULK)) and is supplied at its base with a coarse regulating signal S(C). The coarse signal S(C) is referenced to a threshold voltage level that is preferably intermediate of the bulk voltage V(BULK) and the desired load voltage. The regulation transistor T2, in this arrangement, tends to reduce the bulk voltage V(BULK) to be within a narrow range above the threshold voltage level, and the regulation transistor then reduces the resulting voltage to produce a load voltage V(L) that is within a narrow range of the desired load voltage level.

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