Browse Prior Art Database

Series Switched Regulator

IP.com Disclosure Number: IPCOM000092126D
Original Publication Date: 1968-Sep-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Church, RD: AUTHOR

Abstract

The regulator utilizes electronic regeneration to control the on-off times of transistorized power switch 1.

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Series Switched Regulator

The regulator utilizes electronic regeneration to control the on-off times of transistorized power switch 1.

Initially, transistors T2...T4 are conducting and transistors T1, T5...T7 are not conducting. During this period no current flows in windings N1, N2, and N3 of transformer 8 from voltage source Vin. Also, bias source Vb is charging capacitor C9 through the conducting transistor T2. When the voltage level on C9 reaches the threshold level of T5, the latter conducts. As a result, current flows in the transformer 8 windings and T1 is turned on. C9 discharges primarily through the base-emitter circuit of the conducting T5 until it reaches a steady-state condition. The current passing through N2 is comprised of the currents passing through N1 and the still conducting T2 as well as the reflected current from N3. The current in the winding N2 increases inductively until a voltage level is reached at the junction 10 which causes transistor 6 to conduct.

When T6 conducts, it turns on T7, the input of which is coupled to the output of T6. With T7 on, the current from Vb bypasses T2 and flows through the collector-emitter circuit of T7, the output of which is connected to the input of T6. Currents in the respective emitter-collector circuits of T6 and T7 latch the latter on.

The turning off of T2 results in the turning off of T5 and consequently T1. The current through N1 begins to decrease. When the selected voltage reverses its polarity, i...