Browse Prior Art Database

Antistorage System for Driving a Power Transistor

IP.com Disclosure Number: IPCOM000091597D
Original Publication Date: 1968-Mar-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Briot, JC: AUTHOR

Abstract

This system establishes a dependence between the storage value and the importance of the base current supplied to high-frequency power transistor. The system comprises power transistor T1, control transistor T2, polarity control transistor T3 and driving core 4. The latter includes control winding 5, polarization winding 6 and drive winding 7 of T1. Resistor R1 is the polarization resistance of T2. In the polarization control circuit there are choke L, diode D and resistor R2. The system has short blocking times and allows an action upon the driving core polarization as well as the antistorage circuit control by a signal between the time when the signal which drives T1 is applied and the time when T1 is blocked.

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Antistorage System for Driving a Power Transistor

This system establishes a dependence between the storage value and the importance of the base current supplied to high-frequency power transistor. The system comprises power transistor T1, control transistor T2, polarity control transistor T3 and driving core 4. The latter includes control winding 5, polarization winding 6 and drive winding 7 of T1. Resistor R1 is the polarization resistance of T2. In the polarization control circuit there are choke L, diode D and resistor R2. The system has short blocking times and allows an action upon the driving core polarization as well as the antistorage circuit control by a signal between the time when the signal which drives T1 is applied and the time when T1 is blocked.

When the control operation stops, the polarization current causes a reverse current to flow through the base when T1 is blocked. If a constant control current is considered, by acting upon the polarization current, the direct and reverse currents flow in an opposite directions in the base. When the polarization current is varied, the blocking time of the transistor is also varied. The driving signal for T3 is of a duration which is a function of that for controlling the anti-storage circuit, the signal at C. The current which flows through winding 6 is related to the width of the signal for driving T3. If the blocking time of T1 tends to be long, the current which flows through winding 6 tends to be import...