Current pulse circuit for ferrite core memories

Details Current pulse circuit for ferrite core memories Current pulse circuit for ferrite core memories

1977-03-16

1979-02-27

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307297, 307314, H03K 100

Patent

active

041421132

ABSTRACT:
Current pulse circuit for the supply of a well-defined current pulse to a ferrite core memory of the type where a desired current loop is set up by means of current gates according to a coordinate system. In order to reduce power loss and activation time the circuit is provided with a current regulator comprising a number of parallel-connected output transistors connected as emitter-followers. Base current is supplied to the output transistors by a driver circuit which is controlled by a control voltage received from a comparator circuit in correspondence with the difference between the momentary value of the pulse current and a target value produced by a reference source. The circuit may be further improved by the inclusion of an auxiliary current circuit in parallel with the output transistors, dimensioned to supply an auxiliary current which is equal to or less than the target value.

REFERENCES:
patent: 3600667 (1971-08-01), Wynn
patent: 3675114 (1972-07-01), Nercessian

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