Patent US3313448A successfully refreshed from Google Patents.
Patent US3081436A successfully refreshed from Google Patents.
US3081436A
Expired / Lapsed
US
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Negative resistance diode oscillator
Assignee: General Electric Co
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Filing: 1959-12-15
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Granted: 1963-03-12
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Expires: 1979-12-15
Abstract
No abstract record available.
Inventors
- 👤 Robert L Watters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:07
CPC Classifications
H; H03; H03B; H03B7/00; H03B7/02; H03B7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A FREQUENCY CONTROLLED OSCILLATOR CIRCUIT COMPRISING: A NARROW JUNCTION DEGENERATE SEMICONDUCTOR DIODE DEVICE EXHIBITING A NEGATIVE RESISTANCE REGION IN THE LOW FORWARD VOLTAGE RANGE OF ITS CURRENT-VOLTAGE CHARACTERISTIC; BIAS MEANS IN CIRCUIT WITH SAID DIODE DEVICE ESTABLISHING A DIRECT CURRENT OPERATING POINT THEREFOR IN SAID NEGATIVE RESISTANCE REGION; A PIEZOELECTRIC CRYSTAL HAVING A PREDETERMINED PARALLEL RESONANT FREQUENCY CONNECTED IN PARALLEL CIRCUIT RELATION WITH SAID DIODE DEVICE; AN INDUCTANCE; AND MEANS EFFECTIVELY CONNECTING SAID INDUCTANCE IN SERIES CIRCUIT WITH SAID DIODE AT ZERO FREQUENCY AND IN PARALLEL THEREWITH NEAR THE SELECTED PARALLEL RESONANT FREQUENCY OF SAID CRYSTAL, SAID INDUCTANCE, A PIEZOELECTRIC CRYSTAL AND CONNECTING MEANS FORMING A FREQUENCY DETERMINING NETWORK FOR SAID DIODE DEVICE HAVING ITS HIGHEST IMPEDANCE ONLY AT THE SELECTED PARALLEL RESONANT FREQUENCY OF SAID CRYSTAL.
Claim 2
Dependent Claim
127 words
A FREQUENCY CONTROLLED OSCILLATOR CIRCUIT COMPRISING: A NARROW JUNCTION DEGENERATE SEMICONDUCTOR DIODE DEVICE EXHIBITING A NEGATIVE RESISTANCE REGION IN THE LOW FORWARD VOLTAGE RANGE OF ITS CURRENT-VOLTAGE CHARACTERISTIC; BIAS MEANS IN CIRCUIT WITH SAID DIODE DEVICE ESTABLISHING A DIRECT CURRENT OPERATING POINT THEREFOR IN SAID NEGATIVE RESISTANCE REGION; A PIEZOELECTRIC CRYSTAL HAVING A PREDETERMINED PARALLEL RESONANT FREQUENCY CONNECTED IN PARALLEL CIRCUIT RELATION WITH SAID DIODE DEVICE; AN INDUCTANCE; AND MEANS EFFECTIVELY CONNECTING SAID INDUCTANCE IN SERIES CIRCUIT WITH SAID DIODE AT ZERO FREQUENCY AND IN PARALLEL THEREWITH NEAR THE SELECTED PARALLEL RESONANT FREQUENCY OF SAID CRYSTAL, SAID INDUCTANCE, A PIEZOELECTRIC CRYSTAL AND CONNECTING MEANS FORMING A FREQUENCY DETERMINING NETWORK FOR SAID DIODE DEVICE HAVING ITS HIGHEST IMPEDANCE ONLY AT THE SELECTED PARALLEL RESONANT FREQUENCY OF SAID CRYSTAL.
References Cited (Backward Citations)
US2506762A
Cited
US2469569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |