US3440645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analog-to-digital converter
Assignee: Collins Radio Co
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Filing: 1965-08-04
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Granted: 1969-04-22
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Expires: 1985-08-04
Abstract
No abstract record available.
Inventors
- 👤 Charles O Feigleson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:57
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/22; H03K5/26; G; G06; G06F; G06F7/00; G06F7/60; G06F7/605; H03M; H03M1/00; H03M1/12; H03M1/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN AN ANALOG-TO-DIGITAL CONVERTER FOR CONVERSION OF AN ANALOG VARYING D.C. SIGNAL FROM AN ANALOG VARIABLE D.C. VOLTAGE SOURCE TO DIGITAL OUTPUT FORM: A FIRST VOLTAGE CONTROLLED OSCILLATOR; A PHASE CONTROLLED OSCILLATOR CIRCUIT CONNECTED TO RECEIVE AN INPUT FROM SAID FIRST VOLTAGE CONTROLLED OSCILLATOR; A VOLTAGE POTENTIAL REFERENCE SOURCE; FIRST SWITCH MEANS CONNECTED TO THE INPUT OF SAID FIRST VOLTAGE CONTROLLED OSCILLATOR, AND CONSTRUCTED TO ALTERNATELY SWITCH CONNECTION BETWEEN SAID ANALOG VARIABLE D.C. VOLTAGE SOURCE AND SAID VOLTAGE POTENTIAL REFERENCE SOURCE; TIMING CONTROL MEANS; MEANS ACTUATED BY SAID TIMING CONTROL MEANS FOR CONTROLLING SWITCHING CONTROL OF SAID FIRST SWITCH MEANS; SECOND SWITCH MEANS IN SAID PHASE CONTROLLED OSCILLATOR CIRCUIT; DIGITAL SUBTRACTOR LOGIC CIRCUIT MEANS; SAID FIRST VOLTAGE CONTROLLED OSCILLATOR HAVING A CON-
Claim 2
Dependent Claim
122 words
IN AN ANALOG-TO-DIGITAL CONVERTER FOR CONVERSION OF AN ANALOG VARYING D.C. SIGNAL FROM AN ANALOG VARIABLE D.C. VOLTAGE SOURCE TO DIGITAL OUTPUT FORM: A FIRST VOLTAGE CONTROLLED OSCILLATOR; A PHASE CONTROLLED OSCILLATOR CIRCUIT CONNECTED TO RECEIVE AN INPUT FROM SAID FIRST VOLTAGE CONTROLLED OSCILLATOR; A VOLTAGE POTENTIAL REFERENCE SOURCE; FIRST SWITCH MEANS CONNECTED TO THE INPUT OF SAID FIRST VOLTAGE CONTROLLED OSCILLATOR, AND CONSTRUCTED TO ALTERNATELY SWITCH CONNECTION BETWEEN SAID ANALOG VARIABLE D.C. VOLTAGE SOURCE AND SAID VOLTAGE POTENTIAL REFERENCE SOURCE; TIMING CONTROL MEANS; MEANS ACTUATED BY SAID TIMING CONTROL MEANS FOR CONTROLLING SWITCHING CONTROL OF SAID FIRST SWITCH MEANS; SECOND SWITCH MEANS IN SAID PHASE CONTROLLED OSCILLATOR CIRCUIT; DIGITAL SUBTRACTOR LOGIC CIRCUIT MEANS; SAID FIRST VOLTAGE CONTROLLED OSCILLATOR HAVING A CON-
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) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |