Patent US5088037A successfully refreshed from Google Patents.
Patent US3132307A successfully refreshed from Google Patents.
US3132307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide band differential amplifier having a.d.c. dropping stage
Assignee: HP Inc
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Filing: 1961-02-03
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Granted: 1964-05-05
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Expires: 1981-02-03
Abstract
No abstract record available.
Inventors
- 👤 Albert F Augustine
- 👤 Jr Ralph H Britton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:31
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/34; H03F3/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
AN AMPLIFIER CIRCUIT HAVING TWO SIGNAL CHANNELS AND BEING ADAPTED TO PROCESS A PAIR OF SIGNALS, SAID CIRCUIT COMPRISING FOR EACH OF SAID CHANNELS: AN AMPLIFIER HAVING INPUT AND OUTPUT TERMINALS RESISTIVE MEANS CONNECTED TO SAID OUTPUT TERMINAL FOR APPLYING THERETO ONE OF SAID PAIR OF SIGNALS, MEANS CONNECTED TO SAID INPUT TERMINAL FOR APPLYING THERETO A PORTION OF THE OTHER OF SAID PAIR OF SIGNALS TO MAINTAIN THE CURRENT IN SAID RESISTIVE MEANS CONSTANT, A UTILIZATION CIRCUIT, AND MEANS CONNECTING THE OUTPUT TERMINAL OF SAID AMPLIFIER TO SAID UTILIZATION CIRCUIT.
Claim 2
Dependent Claim
91 words
AN AMPLIFIER CIRCUIT HAVING TWO SIGNAL CHANNELS AND BEING ADAPTED TO PROCESS A PAIR OF SIGNALS, SAID CIRCUIT COMPRISING FOR EACH OF SAID CHANNELS: AN AMPLIFIER HAVING INPUT AND OUTPUT TERMINALS RESISTIVE MEANS CONNECTED TO SAID OUTPUT TERMINAL FOR APPLYING THERETO ONE OF SAID PAIR OF SIGNALS, MEANS CONNECTED TO SAID INPUT TERMINAL FOR APPLYING THERETO A PORTION OF THE OTHER OF SAID PAIR OF SIGNALS TO MAINTAIN THE CURRENT IN SAID RESISTIVE MEANS CONSTANT, A UTILIZATION CIRCUIT, AND MEANS CONNECTING THE OUTPUT TERMINAL OF SAID AMPLIFIER TO SAID UTILIZATION CIRCUIT.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |