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Core Shift Register

IP.com Disclosure Number: IPCOM000098659D
Original Publication Date: 1959-Aug-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Adams, LR: AUTHOR [+3]

Abstract

The circuit is a shift register for shifting binary bits one position at a time. A feature of this circuit is the relatively low power required from its drivers.

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Core Shift Register

The circuit is a shift register for shifting binary bits one position at a time. A feature of this circuit is the relatively low power required from its drivers.

A binary one is entered into the register by turning the B driver on and applying a positive pulse to input terminal 10. The current flow through winding N1 on the core 11 reverses the magnetic flux in the core. The resulting potential induced in winding N3 on the same core turns transistor T1 on and permits capacitor 13 to charge. The A driver is then turned on, permitting capacitor 13 to discharge through winding N2 on core 11 and change the magnetic flux in this core back to its original direction. The voltage induced in winding N4 as a result of the flux change in the core causes transistor T2 to conduct and permit capacitor 14 to charge.

When the B driver comes on again, capacitor 14 discharges through winding N1 of core 12 to transfer the binary one in the first

order of the register to the second order. The register is cleared by holding the reset line at such a value of voltage that the potential induced in any N3 winding does not turn the respective transistor on. Very little power is required from the drivers, since both drivers serve primarily as switches to discharge a capacitor through a core winding.

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