US3231729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic storage analog computer
Assignee: Computer Systems Inc
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Filing: 1961-03-31
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Granted: 1966-01-25
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Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
- 👤 Robert K Stern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:40
CPC Classifications
G; G11; G11C; G11C27/00; G11C27/02; G11C27/024; G11C27/026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
AN ANALOG COMPUTER COMPRISING A PLURALITY OF INTEGRATING AMPLIFIER UNITS EACH INCLUDING AN OPERATIONAL AMPLIFIER PROVIDED WITH AN INTEGRATING CAPACITOR ARRANGED FOR CONNECTION IN A FIRST FEEDBACK LOOP BETWEEN THE OUTPUT AND INPUT TERMINALS OF SAID AMPLIFIER, A FEEDBACK RESISTOR ARRANGED FOR CONNECTION IN A SECOND SUCH FEEDBACK LOOP, AN INPUT RESISTOR CONNECTED WITH SAID FEEDBACK RESISTOR AT A SUMMING POINT IN SAID SECOND FEEDBACK LOOP, AND IMPEDANCE STEP-DOWN AND SWITCHING MEANS CONNECTED BETWEEN SAID SUMMING POINT AND THE INPUT OF EACH SAID AMPLIFIER FOR SELECTIVELY EFFECTING AN OPERATIVE CONNECTION BETWEEN THE SAME; MEANS FOR CONNECTING AID AMPLIFIER UNITS IN CASCADE, AND CONTROL MEANS COUPLED WITH SAID SELECTIVE MEANS OF AT LEAST ONE OF SAID AMPLIFIER UNITS RECURRENTLY TO EFFECT AN OPERATIVE CONNECTION BETWEEN THE RESPECTIVE SUMMING POINT AND AMPLIFIER INPUT THEREOF.
Claim 2
Dependent Claim
132 words
AN ANALOG COMPUTER COMPRISING A PLURALITY OF INTEGRATING AMPLIFIER UNITS EACH INCLUDING AN OPERATIONAL AMPLIFIER PROVIDED WITH AN INTEGRATING CAPACITOR ARRANGED FOR CONNECTION IN A FIRST FEEDBACK LOOP BETWEEN THE OUTPUT AND INPUT TERMINALS OF SAID AMPLIFIER, A FEEDBACK RESISTOR ARRANGED FOR CONNECTION IN A SECOND SUCH FEEDBACK LOOP, AN INPUT RESISTOR CONNECTED WITH SAID FEEDBACK RESISTOR AT A SUMMING POINT IN SAID SECOND FEEDBACK LOOP, AND IMPEDANCE STEP-DOWN AND SWITCHING MEANS CONNECTED BETWEEN SAID SUMMING POINT AND THE INPUT OF EACH SAID AMPLIFIER FOR SELECTIVELY EFFECTING AN OPERATIVE CONNECTION BETWEEN THE SAME; MEANS FOR CONNECTING AID AMPLIFIER UNITS IN CASCADE, AND CONTROL MEANS COUPLED WITH SAID SELECTIVE MEANS OF AT LEAST ONE OF SAID AMPLIFIER UNITS RECURRENTLY TO EFFECT AN OPERATIVE CONNECTION BETWEEN THE RESPECTIVE SUMMING POINT AND AMPLIFIER INPUT THEREOF.
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |