US3213387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power amplifier for reducing thirdorder intermodulation products in single-sideband signals
Assignee: US Philips Corp
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Filing: 1961-11-15
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Granted: 1965-10-19
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Expires: 1981-11-15
Abstract
No abstract record available.
Inventors
- 👤 Snijders Cornelis Arie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:24
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/34; H03F1/36; H03F1/32; H03F1/33
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
AN AMPLIFIER FOR SINGLE-SIDEBAND SIGNALS COMPRISING AN AMPLIFYING DEVICE HAVING AN INPUT ELECTRODE AND SECOND AND THIRD ELECTRODES, A SOURCE OF OPERATING POTENTIAL, MEANS CONNECTING SAID SOURCE OF OPERATING POTENTIAL BETWEEN SAID SECOND AND THIRD ELECTRODES, A SOURCE OF SINGLE-SIDEBAND SIGNALS CONNECTED TO SAID INPUT ELECTRODE WHEREBY CURRENT FLOW IN SAID DEVICE BETWEEN SAID SECOND AND THIRD ELECTRODES VARIES AS A FUNCTION OF SAID SIGNALS, AND MEANS FOR COMPENSATING FOR THIRD-ORDER INTERMODULATION CURRENTS IN SAID AMPLIFIER COMPRISING RESONANT CIRCUIR MEANS TUNED TO A FREQUENCY HIGHER THAN SAID SINGLE-SIDEBAND SIGNALS AND CONNECTED TO SAID DEVICE FOR SHIFTING THE PHASE OF SECONDORDER DISTORTION CURRENTS IN SAID SEVICE WHEREBY SAID SIGNALS MIX WITH SAID PHASE SHIFTED SECOND-ORDER DISTORTION CURRENTS IN SAID DEVICE TO PROVIDE CURRENTS SUBSTANTIALLY CANCELLING SAID THIRD-ORDER INTERMODULATION CURRENTS.
Claim 2
Dependent Claim
128 words
AN AMPLIFIER FOR SINGLE-SIDEBAND SIGNALS COMPRISING AN AMPLIFYING DEVICE HAVING AN INPUT ELECTRODE AND SECOND AND THIRD ELECTRODES, A SOURCE OF OPERATING POTENTIAL, MEANS CONNECTING SAID SOURCE OF OPERATING POTENTIAL BETWEEN SAID SECOND AND THIRD ELECTRODES, A SOURCE OF SINGLE-SIDEBAND SIGNALS CONNECTED TO SAID INPUT ELECTRODE WHEREBY CURRENT FLOW IN SAID DEVICE BETWEEN SAID SECOND AND THIRD ELECTRODES VARIES AS A FUNCTION OF SAID SIGNALS, AND MEANS FOR COMPENSATING FOR THIRD-ORDER INTERMODULATION CURRENTS IN SAID AMPLIFIER COMPRISING RESONANT CIRCUIR MEANS TUNED TO A FREQUENCY HIGHER THAN SAID SINGLE-SIDEBAND SIGNALS AND CONNECTED TO SAID DEVICE FOR SHIFTING THE PHASE OF SECONDORDER DISTORTION CURRENTS IN SAID SEVICE WHEREBY SAID SIGNALS MIX WITH SAID PHASE SHIFTED SECOND-ORDER DISTORTION CURRENTS IN SAID DEVICE TO PROVIDE CURRENTS SUBSTANTIALLY CANCELLING SAID THIRD-ORDER INTERMODULATION CURRENTS.
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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |