US3348162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit with selective nonlinear feedback
Assignee: International Business Machines Corp
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Filing: 1965-02-26
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Granted: 1967-10-17
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Expires: 1985-02-26
Abstract
No abstract record available.
Inventors
- 👤 James B Atkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:59
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03F; H03F1/00; H03F1/08; H03F1/083; H03F1/32; H03F3/00; H03F3/34; H03F3/343; H03G; H03G11/00; H03G11/02; H03K19/00; H03K19/01; H03K19/013; H03K19/02; H03K19/08; H03K19/082; H03K19/084; H03K5/00; H03K5/01; H03K5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A CIRCUIT COMPRISING: FIRST AND SECOND STAGES OF AMPLIFYING DEVICES CONNECTED TO PRODUCE AT AN OUTPUT TERMINAL OF SAID SECOND STAGE A SIGNAL THAT IS INVERTED WITH RESPECT TO A SIGNAL AT AN INPUT TERMINAL OF SAID FIRST STAGE; CIRCUIT MEANS CONNECTED BETWEEN SAID OUTPUT TERMINAL AND INPUT TERMINALS FOR NEGATIVE FEEDBACK AND TENDING TO PRODUCE UNWANTED OSCILLATIONS; MEANS IN SAID FIRST STAGE PROVIDING NEGATIVE FEEDBACK TENDING TO SLOW THE RESPONSE OF THE CIRCUIT; AND MEANS CONNECTED TO CONTROL SAID NEGATIVE FEEDBACK MEANS FOR SAID FIRST STAGE IN RESPONSE TO THE VOLTAGE LEVEL AT SAID OUTPUT TERMINAL TO MAKE SAID NEGATIVE FEEDBACK SELECTIVE WITHIN THE OSCILLATORY CYCLE TO OPPOSE THE UNWANTED OSCILLATION.
Claim 2
Dependent Claim
112 words
A CIRCUIT COMPRISING: FIRST AND SECOND STAGES OF AMPLIFYING DEVICES CONNECTED TO PRODUCE AT AN OUTPUT TERMINAL OF SAID SECOND STAGE A SIGNAL THAT IS INVERTED WITH RESPECT TO A SIGNAL AT AN INPUT TERMINAL OF SAID FIRST STAGE; CIRCUIT MEANS CONNECTED BETWEEN SAID OUTPUT TERMINAL AND INPUT TERMINALS FOR NEGATIVE FEEDBACK AND TENDING TO PRODUCE UNWANTED OSCILLATIONS; MEANS IN SAID FIRST STAGE PROVIDING NEGATIVE FEEDBACK TENDING TO SLOW THE RESPONSE OF THE CIRCUIT; AND MEANS CONNECTED TO CONTROL SAID NEGATIVE FEEDBACK MEANS FOR SAID FIRST STAGE IN RESPONSE TO THE VOLTAGE LEVEL AT SAID OUTPUT TERMINAL TO MAKE SAID NEGATIVE FEEDBACK SELECTIVE WITHIN THE OSCILLATORY CYCLE TO OPPOSE THE UNWANTED OSCILLATION.
References Cited (Backward Citations)
US3092729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |