Patent US2501760A successfully refreshed from Google Patents.
Patent US3602888A successfully refreshed from Google Patents.
US3602888A
Expired / Lapsed
US
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Learning device
Assignee: Panasonic Holdings Corp
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Filing: 1968-12-09
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Granted: 1971-08-31
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Expires: 1988-12-09
Abstract
Abstract A learning device having a plurality of magnetic cores which serve as multistage level weight memory elements. In the device, the product of an input and a corresponding weight is delivered from the magnetic core in the form of a digital output, and the sum of digital outputs is compared with a threshold value in a decision circuit to derive an error signal so that the weight carried by each magnetic core can fully automatically be corrected until the actual output coincides with an expected output.
Inventors
- 👤 Akira Nishiyama
- 👤 Hirokazu Yoshino
- 👤 Tomio Yoshida
- 👤 Tetsuo Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:10
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/02; G06F7/023
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
171 words
A learning device for automatically adapting itself to produce a desired output in response to an input pattern, comprising in combination: a. multistage weighting means connected to plural input terminals for producing product signals of the respective inputs and corresponding weights, b. means for summing said product signals, c. decision means for comparing the sum with a preselected threshold value to deliver a classification output, d. logical control means connected between said decision means and weighting means for delivering a sequence of pulses to the latter for successively selecting certain weights of said weighting means for production of said product signals and delivering learning pulses to the latter for shifting said certain weights to obtain said classification output in coincidence with the desired response: wherein said weighting means each comprises magnetic core memory element capable of being magnetized at a certain number of magnetization levels ranging from the negative saturation to the positive saturation with its excitations responsive to the application of the sequence of pulses for presenting the corresponding weight.
Claim 2
Dependent Claim
171 words
A learning device for automatically adapting itself to produce a desired output in response to an input pattern, comprising in combination: a. multistage weighting means connected to plural input terminals for producing product signals of the respective inputs and corresponding weights, b. means for summing said product signals, c. decision means for comparing the sum with a preselected threshold value to deliver a classification output, d. logical control means connected between said decision means and weighting means for delivering a sequence of pulses to the latter for successively selecting certain weights of said weighting means for production of said product signals and delivering learning pulses to the latter for shifting said certain weights to obtain said classification output in coincidence with the desired response: wherein said weighting means each comprises magnetic core memory element capable of being magnetized at a certain number of magnetization levels ranging from the negative saturation to the positive saturation with its excitations responsive to the application of the sequence of pulses for presenting the corresponding weight.
Claim 3
Dependent Claim
172 words
A learning device according to claim 1, wherein said control means has a pulse generator for generating the sequence of pulses, said weighting means each further comprises a multistable circuit whose specific state shifts from stage to stage with the successive application of the learning pulses thereto, weight supply gate means operable to supply the certain weight by the specific state of said multistable circuit, said memory element being coupled to said multistable circuit to also shift its magnetization level with the application of the learning pulses, said pulse generator being connected to said memory element to supply thereto the same number of excitation pulses as the number of the stages of said multistable circuit in the case of occasional disappearance of the specific state on the circuit and being connected to said multistable circuit to supply thereto a certain number of pulses of said excitation pulses occurring after the establishment of the memory element reset to the negative saturation for restoring its position of the specific state just before the disappearance.
Claim 4
Dependent Claim
96 words
A learning device according to claim 1, wherein said memory elements are connected to the respective input terminals, said control means having a constant-voltage pulse generator for supplying the sequence of a predetermined numbeR of pulses to the respective memory elements for shifting their magnetization levels defined as weights, said weighting means digitally supplying to said summing means the product signals of the respective inputs and the corresponding weights each composed of a certain number of pulses supplied from said generator after the establishment of each memory element reset to its saturation in the negative direction.
Claim 5
Dependent Claim
137 words
A learning device according to claim 3, wherein said memory element comprises a magnetic core carrying a write-in winding with its one end connected to said pulse generator for the excitation of the core with the application of the sequence of pulses, a feedback winding with its one end connected through a resistor to the other end of said write-in winding and a reset winding with its one end connected through a resistor, the collector and emitter of a transistor and a DC power supply to its other end, and comprises a diode connecting its anode and cathode to the other end of said feedback winding and the base of said transistor respectively, said emitter being connected through a resistor to the other end of said write-in winding for ensuring the stabilized reset operation of the core.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |