US3715522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-track magnetic hall head
Assignee: Pioneer Corp
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Filing: 1970-07-29
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Granted: 1973-02-06
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Expires: 1990-07-29
Abstract
Abstract A multi-track magnetic head comprising a plurality of threeterminal T-type Hall elements each having one Hall potential terminal and two current terminals provided at both ends thereof, said Hall elements being arranged at positions aligned with a corresponding number of tracks provided on a magnetic tape to be reproduced, an electric power source supplying electric currents only to a selected number of Hall elements aligned with the tracks to be reproduced simultaneously, a common terminal provided on a balancing resistor connected across the power source, and a capacitor for adjusting the impedance of the power source so that the ratio between the impedance of each Hall element to the impedance of the power source is selected to be more than 100 in general cases and to be more than 10 when a stereophonic reproduction is undertaken.
Inventors
- 👤 T Tsukagoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:37
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/37; G11B5/376; G11B5/378; G11B5/48; G11B5/49; G11B5/4969
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
201 words
A multi-track magnetic head comprising a plurality of three terminal Hall elementS, each Hall element having two current terminals, one at each end thereof, and one Hall potential terminal positioned on the side of the element opposite to the side which contacts a magnetic tape to be reproduced, said plurality of Hall elements being arranged side by side in positions adapted to be aligned with a plurality of tracks on the magnetic tape; electric power source means for supplying current only to selected ones of said plurality of Hall elements which are aligned with the tracks to be simultaneously reproduced, wherein said selected ones are less than all of said plurality; a balancing resistor connected across said power source, said resistor having a terminal common to said selected ones of said Hall elements; and means for reducing the cross-talk between the selected ones of said Hall elements, said means including means for adjusting the impedance of said power source so that the ratio of the impedance of each of the selected ones of said Hall elements to the impedance of the power source is selected to be larger than approximately 100 for nonstereophonic recorded signals and/or 10 for stereophonic recorded signals.
Claim 2
Dependent Claim
201 words
A multi-track magnetic head comprising a plurality of three terminal Hall elementS, each Hall element having two current terminals, one at each end thereof, and one Hall potential terminal positioned on the side of the element opposite to the side which contacts a magnetic tape to be reproduced, said plurality of Hall elements being arranged side by side in positions adapted to be aligned with a plurality of tracks on the magnetic tape; electric power source means for supplying current only to selected ones of said plurality of Hall elements which are aligned with the tracks to be simultaneously reproduced, wherein said selected ones are less than all of said plurality; a balancing resistor connected across said power source, said resistor having a terminal common to said selected ones of said Hall elements; and means for reducing the cross-talk between the selected ones of said Hall elements, said means including means for adjusting the impedance of said power source so that the ratio of the impedance of each of the selected ones of said Hall elements to the impedance of the power source is selected to be larger than approximately 100 for nonstereophonic recorded signals and/or 10 for stereophonic recorded signals.
Claim 3
Dependent Claim
201 words
A multi-track magnetic head comprising a plurality of three terminal Hall elementS, each Hall element having two current terminals, one at each end thereof, and one Hall potential terminal positioned on the side of the element opposite to the side which contacts a magnetic tape to be reproduced, said plurality of Hall elements being arranged side by side in positions adapted to be aligned with a plurality of tracks on the magnetic tape; electric power source means for supplying current only to selected ones of said plurality of Hall elements which are aligned with the tracks to be simultaneously reproduced, wherein said selected ones are less than all of said plurality; a balancing resistor connected across said power source, said resistor having a terminal common to said selected ones of said Hall elements; and means for reducing the cross-talk between the selected ones of said Hall elements, said means including means for adjusting the impedance of said power source so that the ratio of the impedance of each of the selected ones of said Hall elements to the impedance of the power source is selected to be larger than approximately 100 for nonstereophonic recorded signals and/or 10 for stereophonic recorded signals.
Claim 4
Dependent Claim
201 words
A multi-track magnetic head comprising a plurality of three terminal Hall elementS, each Hall element having two current terminals, one at each end thereof, and one Hall potential terminal positioned on the side of the element opposite to the side which contacts a magnetic tape to be reproduced, said plurality of Hall elements being arranged side by side in positions adapted to be aligned with a plurality of tracks on the magnetic tape; electric power source means for supplying current only to selected ones of said plurality of Hall elements which are aligned with the tracks to be simultaneously reproduced, wherein said selected ones are less than all of said plurality; a balancing resistor connected across said power source, said resistor having a terminal common to said selected ones of said Hall elements; and means for reducing the cross-talk between the selected ones of said Hall elements, said means including means for adjusting the impedance of said power source so that the ratio of the impedance of each of the selected ones of said Hall elements to the impedance of the power source is selected to be larger than approximately 100 for nonstereophonic recorded signals and/or 10 for stereophonic recorded signals.
Claim 5
Dependent Claim
27 words
A multi-track magnetic head as defined in claim 1 wherein said means for adjusting impedance of the power source is a capacitor connected across said power source.
Claim 6
Dependent Claim
27 words
A multi-track magnetic head as defined in claim 1 wherein said power source comprises a D.C. power source and a current adjusting variable resistor connected in series.
Claim 7
Dependent Claim
29 words
A multi-track magnetic head as defined in claim 1 wherein said selected number of Hall elements aligned with the tracks to be reproduced simultaneously is selected to be two.
Claim 8
Dependent Claim
51 words
A multi-track magnetic head as defined in claim 4 wherein the currents supplied only to said two Hall elements aligned with the tracks to be reproduced simultaneously flow through said two Hall elements in opposite directions so that the output Hall potentials from said two Hall elements are of opposite polarity.
Claim 9
Dependent Claim
33 words
A multi-track magnetic head as defined in claim 1, further comprising switching means whereby said electric power source means supplies current only to said selected ones of Hall elements, through said switching means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |