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Magnetic Core Counter

IP.com Disclosure Number: IPCOM000098654D
Original Publication Date: 1959-Aug-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

Sommerfield, EH: AUTHOR

Abstract

This circuit generates trains of pulses wherein each successive pulse within a train is lower in amplitude than the preceding pulse. The number of pulses generated before the pulse amplitude diminishes to some predetermined value is known. A counter is constructed by applying the output of this circuit to the input of a voltage sensing device of the type which provides an indication when the input voltage drops to a specific value.

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Magnetic Core Counter

This circuit generates trains of pulses wherein each successive pulse within a train is lower in amplitude than the preceding pulse. The number of pulses generated before the pulse amplitude diminishes to some predetermined value is known. A counter is constructed by applying the output of this circuit to the input of a voltage sensing device of the type which provides an indication when the input voltage drops to a specific value.

A negative pulse applied to input terminal 10 drives core 12 to a first direction of magnetic saturation and a subsequent positive pulse applied to input terminal 11 drives the core to magnetic saturation in the reverse direction. When the direction of magnetization within the core is reversed, a pulse is generated in winding 13 which charges capacitor 14 and also provides a pulse at the output terminals of the circuit. A positive pulse applied to terminal 15 then renders the transistor conductive, and the capacitor discharges through the transistor and winding 16 driving the core back to its first direction of magnetization, but to a lower level of magnetization because of losses in the circuit and components.

A positive pulse is again applied to terminal 11, again reversing the direction of magnetization within the core and generating a pulse in winding 13. This action again charges the capacitor and delivers a pulse at the circuit output terminals which is of lower amplitude than the preceding output pulse. By ...