US3177378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor amplifier and frequency multiplier
Assignee: National Research Council Canada
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Filing: 1962-10-02
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Granted: 1965-04-06
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Expires: 1982-10-02
Abstract
No abstract record available.
Inventors
- 👤 Pulfer James Kenneth
- 👤 Lindsay Albert Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:07
CPC Classifications
H; H03; H03B; H03B19/00; H03B19/06; H03B19/14; H03B1/00; H03B1/04; H03B2200/00; H03B2200/006; H03B2200/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A TRANSISTOR AMPLIFIER AND FREQUENCY MULTIPLIER COMPRISING, (A) A JUNCTION TRANSISTOR HAVING A BASE, A COLLECTOR AND AN EMITTER, AND IN WHICH THE BASE-TO-COLLECTOR JUNCTION ACTS AS A VARIABLE CAPACITANCE HARMONIC GENERATOR, (B) MEANS FOR SUPPLYING A SIGNAL AT A FREQUENCY LYING WITHIN THE NORMAL RANGE OF OPERATION OF THE TRANSISTOR BETWEEN THE BASE AND EMITTER OF SAID TRANSISTOR, (C) A FIRST RESONANT CIRCUIT TUNED TO THE FREQUENCY OF THE INPUT SIGNAL, (D) A SOURCE OF DIRECT CURRENT BIAS VOLTAGE, (E) MEANS FOR CONNECTING SAID FIRST RESONANT CIRCUIT AND SAID BIAS VOLTAGE IN SERIES BETWEEN COLLECTOR AND EMITTER OF SAID TRANSISTOR, (F) A SECOND RESONANT CIRCUIT TUNED TO A DESIRED HARMONIC OF SAID SIGNAL FREQUENCY CONNECTED ACROSS AT LEAST A PORTION OF SAID FIRST RESONANT CIRCUIT, (G) SAID DESIRED HARMONIC FREQUENCY BEING ABOVE THE NORMAL RANGE OF OPERATION OF THE TRANSISTOR,
Claim 2
Dependent Claim
141 words
A TRANSISTOR AMPLIFIER AND FREQUENCY MULTIPLIER COMPRISING, (A) A JUNCTION TRANSISTOR HAVING A BASE, A COLLECTOR AND AN EMITTER, AND IN WHICH THE BASE-TO-COLLECTOR JUNCTION ACTS AS A VARIABLE CAPACITANCE HARMONIC GENERATOR, (B) MEANS FOR SUPPLYING A SIGNAL AT A FREQUENCY LYING WITHIN THE NORMAL RANGE OF OPERATION OF THE TRANSISTOR BETWEEN THE BASE AND EMITTER OF SAID TRANSISTOR, (C) A FIRST RESONANT CIRCUIT TUNED TO THE FREQUENCY OF THE INPUT SIGNAL, (D) A SOURCE OF DIRECT CURRENT BIAS VOLTAGE, (E) MEANS FOR CONNECTING SAID FIRST RESONANT CIRCUIT AND SAID BIAS VOLTAGE IN SERIES BETWEEN COLLECTOR AND EMITTER OF SAID TRANSISTOR, (F) A SECOND RESONANT CIRCUIT TUNED TO A DESIRED HARMONIC OF SAID SIGNAL FREQUENCY CONNECTED ACROSS AT LEAST A PORTION OF SAID FIRST RESONANT CIRCUIT, (G) SAID DESIRED HARMONIC FREQUENCY BEING ABOVE THE NORMAL RANGE OF OPERATION OF THE TRANSISTOR,
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |