US3178650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four-terminal, negative-resistance amplifying circuit
Assignee: Individual
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Filing: 1961-08-16
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Granted: 1965-04-13
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Expires: 1981-08-16
Abstract
No abstract record available.
Inventors
- 👤 Hamasaki Joji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:55
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H03F3/10; H03F3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A NEGATIVE-RESISTANCE AMPLIFIER COMPRISING, A FIRST NEGATIVE-RESISTANCE MEANS, MEANS TO APPLY A SIGNAL INPUT TO BE AMPLIFIED TO SAID NEGATIVE-RESISTANCE MEANS, FIRST TUNING CIRCUIT MEANS CONNECTED TO RECEIVE THE OUTPUT OF SAID FIRSTNEGATIVE RESISTANCE MEANS, A PAHSE-SHIFTING CIRCUIT MEANS CONNECTED TO RECEIVE THE OUTPUT OF SAID TUNING CIRCUIT MEANS TO CHANGE THE PAHSE OF SAID OUTPUT THROUGH AN ODD NUMBER MULTIPLE OF APPROXIMATELY 90 DEGREES, SECOND TUNING CIRCUIT MEANS CONNECTED TO RECEIVE THE OUTPUT OF SAID PHASE-SHIFTING CIRCUIT MEANS, AND SECOND NEGATIVERESISTANCE MEANS, CONNECTED TO RECEIVE THE OUTPUT OF SAID SECOND TUNING CIRCUIT MEANS.
Claim 2
Dependent Claim
94 words
A NEGATIVE-RESISTANCE AMPLIFIER COMPRISING, A FIRST NEGATIVE-RESISTANCE MEANS, MEANS TO APPLY A SIGNAL INPUT TO BE AMPLIFIED TO SAID NEGATIVE-RESISTANCE MEANS, FIRST TUNING CIRCUIT MEANS CONNECTED TO RECEIVE THE OUTPUT OF SAID FIRSTNEGATIVE RESISTANCE MEANS, A PAHSE-SHIFTING CIRCUIT MEANS CONNECTED TO RECEIVE THE OUTPUT OF SAID TUNING CIRCUIT MEANS TO CHANGE THE PAHSE OF SAID OUTPUT THROUGH AN ODD NUMBER MULTIPLE OF APPROXIMATELY 90 DEGREES, SECOND TUNING CIRCUIT MEANS CONNECTED TO RECEIVE THE OUTPUT OF SAID PHASE-SHIFTING CIRCUIT MEANS, AND SECOND NEGATIVERESISTANCE MEANS, CONNECTED TO RECEIVE THE OUTPUT OF SAID SECOND TUNING CIRCUIT 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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |