US3221272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-capacitance diode modulator
Assignee: Hitachi Ltd
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Filing: 1963-02-19
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Granted: 1965-11-30
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Expires: 1983-02-19
Abstract
No abstract record available.
Inventors
- 👤 Aoki Nobuhiko
- 👤 Abe Zenmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:15
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/08; H03C1/14; H03C1/52; H03C1/54; H03C1/56; H03C1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A VARIBLE-CAPACITANCE DIODE MODULATOR OF THE TYPE IN WHICH SIGNALS TO BE MODULATED ARE IMPRESSED ON THE DETECTING TERMINALS OF A BRIDGE CIRCUIT HAVING A VARIABLECAPACITANCE DIODE IN AT LEAST ONE ARM THEREOF, AND MODULATION IS ACCOMPLISHED BY EXITING THE SAID BRIDGE CIRCUIT WITH ALTERNATING-CURRENT VOLTAGE, WHEREIN THERE IS FURTHER PROVIDED AT LEAT ONE UNILATERAL ELEMENT IN THE CIRCUIT FOR IMPRESSING EXCITING VOLTAGE ON THE SAID BRIDGE CIRCUIT, THE SAID UNILATERAL ELEMENT IMPARTING A HIGH EXCITING VOLTAGE TO THE INVERSE SIDE OF THE SAID VARIABLECAPACITANCE DIODE AND IMPARTING A VOLTAGE WHICH IS LESS THAN THE VOLTAGE AT WHICH THE SAID DIODE BECOMES CONDUCTIVE TO THE FORWARD SIDE OF THE SAID DIODE.
Claim 2
Dependent Claim
111 words
A VARIBLE-CAPACITANCE DIODE MODULATOR OF THE TYPE IN WHICH SIGNALS TO BE MODULATED ARE IMPRESSED ON THE DETECTING TERMINALS OF A BRIDGE CIRCUIT HAVING A VARIABLECAPACITANCE DIODE IN AT LEAST ONE ARM THEREOF, AND MODULATION IS ACCOMPLISHED BY EXITING THE SAID BRIDGE CIRCUIT WITH ALTERNATING-CURRENT VOLTAGE, WHEREIN THERE IS FURTHER PROVIDED AT LEAT ONE UNILATERAL ELEMENT IN THE CIRCUIT FOR IMPRESSING EXCITING VOLTAGE ON THE SAID BRIDGE CIRCUIT, THE SAID UNILATERAL ELEMENT IMPARTING A HIGH EXCITING VOLTAGE TO THE INVERSE SIDE OF THE SAID VARIABLECAPACITANCE DIODE AND IMPARTING A VOLTAGE WHICH IS LESS THAN THE VOLTAGE AT WHICH THE SAID DIODE BECOMES CONDUCTIVE TO THE FORWARD SIDE OF THE SAID DIODE.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |