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EXCLUSIVE OR Device

IP.com Disclosure Number: IPCOM000098584D
Original Publication Date: 1959-Apr-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Butler, SA: AUTHOR

Abstract

The magnetic core EXCLUSIVE OR device employs a two phase clock drive and transfer circuits including a series capacitor C. With one core S(1a) or S(1b) in the 1 state, upon energization of the A shift windings S(1a) or S(1b) is reset to 0 and provides a counter-clockwise current in the circuit associated with the core S(1a) including the common input winding on K(2b) and K(2a) or a clockwise current in the circuit associated with S(1b) including the common input windings on K(2a) and K(2b). If S(1a) was previously in the 1 state, K(2b) is switched to 1, while if S(1b) was previously in the 1 state, K(2a) is switched to 1, providing a clockwise current in the output loop to charge C(2).

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EXCLUSIVE OR Device

The magnetic core EXCLUSIVE OR device employs a two phase clock drive and transfer circuits including a series capacitor C. With one core S(1a) or S(1b) in the 1 state, upon energization of the A shift windings S(1a) or S(1b) is reset to 0 and provides a counter-clockwise current in the circuit associated with the core S(1a) including the common input winding on K(2b) and K(2a) or a clockwise current in the circuit associated with S(1b) including the common input windings on K(2a) and K(2b). If S(1a) was previously in the 1 state, K(2b) is switched to 1, while if S(1b) was previously in the 1 state, K(2a) is switched to 1, providing a clockwise current in the output loop to charge C(2).

When the rate of switching of K(2a) or K(2b) starts decreasing, C(1b) or C(1a) respectively, starts discharging. If S(1a) was previously at 1 and C(1a) charged, then a clockwise current is provided in the input circuit when C(1a) discharges which tends to switch the K(2a) to 1 and reset K(2b) to 0. If, however, S(1b) was previously at 1 and C(1b) charged, then a counter-clockwise current is provided in the input circuit when C(1b) discharges which tends to switch K(2b) to 1 and reset K(2a) to 0. Simultaneously, C(2) discharges to provide a counter-clockwise current in the output loop which tends to switch K(2a), K(2b) and K(3) to 1. Since K(3) is held by the energization of its A shift winding in the 0 state, it is unaffected while C(2) is discharging. If C(1a)...