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Tuned Adaptive Network

IP.com Disclosure Number: IPCOM000096492D
Original Publication Date: 1963-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Akmenkains, IG: AUTHOR

Abstract

This is a tuned circuit element that can be conditioned to assume various tuned states. The newly conditioned state is remembered until the next conditioning cycle.

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Tuned Adaptive Network

This is a tuned circuit element that can be conditioned to assume various tuned states. The newly conditioned state is remembered until the next conditioning cycle.

The basic circuit is shown in drawing A. It consists of square-loop magnetic core 10, winding 11, capacitor 12, conditioning winding 13, conditioning current source 14 and interrogating voltage source 15. If 14 is deenergized and 15, which is a relatively low voltage source having a constant frequency f1, is energized, a small current i-18 results. The magnitude and phase of i-18 depends on the state of 10 and, therefore, the resonant frequency of the circuit consisting of 10, 11 and 12. If this circuit is tuned to the voltage source frequency f1, the magnitude of the circuit impedance is at its maximum and i-18 is at its minimum with a zero phase angle.

On the other hand, if the circuit is tuned to a frequency other than f1, i-18 has an increased magnitude and is at a non-zero phase angle. The change of the circuit impedance Z with frequency for three different states of magnetization of 10 is shown in drawing B. The state of the circuit can be determined by observing either the magnitude or phase, or both the magnitude and phase, of i-18.

In order to change the state of the circuit, 14 is energized with a controlled pulse of a given polarity. In response to this pulse, 10 is partially switched to a new state of magnetization. It has been determined that the small signal permea...