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Bridge Center Tap Rectifier Regulator

IP.com Disclosure Number: IPCOM000079824D
Original Publication Date: 1973-Sep-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Feth, GC: AUTHOR

Abstract

The circuit of the drawing receives an alternating voltage at the primary winding 2 of a transformer 3 and it produces a regulated direct load voltage at terminals 5, 6. Diodes 7, 8 are connected to form a full-wave rectified voltage between load terminal 5 and the transformer center tap. Diode 9 in the connection of load terminal 6 to the transformer center tap provides isolation. Diodes 11 and 12 cooperate with diodes 7 and 8, to form a full-wave bridge rectifier that is connected to charge a capacitor 13 up to the voltage across the entire secondary winding. A transistor 14 connects the bridge rectifier to load terminal 6.

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Bridge Center Tap Rectifier Regulator

The circuit of the drawing receives an alternating voltage at the primary winding 2 of a transformer 3 and it produces a regulated direct load voltage at terminals 5, 6. Diodes 7, 8 are connected to form a full-wave rectified voltage between load terminal 5 and the transformer center tap. Diode 9 in the connection of load terminal 6 to the transformer center tap provides isolation. Diodes 11 and 12 cooperate with diodes 7 and 8, to form a full-wave bridge rectifier that is connected to charge a capacitor 13 up to the voltage across the entire secondary winding. A transistor 14 connects the bridge rectifier to load terminal 6.

A pulsed control current, derived from the error signal between a reference voltage and the load voltage (by conventional circuits not shown), is applied to the base terminal of transistor 14 to cause it to function as a switching series regulator; when transistor 14 is turned on, it raises the load voltage to a regulated value which is intermediate between the average value supplied by a half of the center-tapped winding and the peak value supplied by the full center-tapped winding to capacitor 15.

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