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Blocking Oscillator

IP.com Disclosure Number: IPCOM000096241D
Original Publication Date: 1963-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Frantz, H: AUTHOR [+2]

Abstract

This is a blocking oscillator having a feed back transformer. Its core 5 exhibits a rectangular hysteresis loop. It is switched from its first into its second magnetic condition during the feedback process. It returns to its first magnetic condition on completion of the feedback process. Such is by a reset winding due to a change in charge of an energy storage device under the control of the blocking oscillator.

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Blocking Oscillator

This is a blocking oscillator having a feed back transformer. Its core 5 exhibits a rectangular hysteresis loop. It is switched from its first into its second magnetic condition during the feedback process. It returns to its first magnetic condition on completion of the feedback process. Such is by a reset winding due to a change in charge of an energy storage device under the control of the blocking oscillator.

A control pulse Ie, applied to winding 1 and thus also to winding 3, is effective to switch transistor Tr to its conductive state. The feedback process is thus initiated through windings 2 and 3 due to current Ic, so that core 5 is transferred from its lower into its upper state of magnetic saturation. Now the feedback is interrupted and Tr returns to its cutoff condition.

In the absence of any further measures, core 5 would now remain in its magnetized condition corresponding to the upper point of remanence, and the next control pulse would have no effect. However, during the conductive state of Tr the condenser C2, which originally had been charged to the voltage Uc2 = -U, has partly discharged and is recharged to the voltage -U with Tr in its cutoff condition. This charge current Ic2 then flows through additional winding 4 and switches core 5 back into its lower remanent condition. The blocking oscillator is then again ready for operation.

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