Patent US3327229A successfully refreshed from Google Patents.
US3327229A
Expired / Lapsed
US
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Voltage to frequency converter utilizing voltage controlled oscillator and operational amplifier
Assignee: Weston Instruments Inc
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Filing: 1964-12-30
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Granted: 1967-06-20
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Expires: 1984-12-30
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Huelsman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:11
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/04; H; H03; H03K; H03K7/00; H03K7/06; H03M; H03M1/00; H03M1/12; H03M1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A CONVERTER CIRCUIT FOR RECEIVING AN INPUT VOLTAGE AND PRODUCING AN OUTPUT ELECTRICAL QUANTITY WHICH IS DIFFERENT FROM BUT WHICH IS REPRESENTATIVE OF SAID INPUT VOLTAGE, COMPRISING: A VOLTAGE CONTROLLED OSCILLATOR HAVING AN INPUT CIRCUIT AND HAVING AN OUTPUT CIRCUIT; AN AMPLIFIER HAVING AN OUTPUT CIRCUIT COUPLED TO SAID INPUT CIRCUIT OF SAID VOLTAGE CONTROLLED OSCILLATOR AND HAVING A PAIR OF INPUT CIRCUITS; MEANS COUPLED TO ONE OF SAID INPUT CIRCUITS OF SAID AMPLIFIER FOR COUPLING SAID INPUT VOLTAGE THERETO; A REFERENCE VOLTAGE CIRCUIT; SWITCHING CIRCUIT MEANS COUPLING SAID REFERENCE VOLTAGE CIRCUIT TO THE OTHER OF SAID PAIR OF INPUT CIRCUITS OF SAID AMPLIFIER; A FIXED FREQUENCY TIMING CIRCUIT; A VARIABLE TIMING CIRCUIT COUPLED TO AND CONTROLLED BY SAID VOLTAGE CONTROLLED OSCILLATOR; AND CIRCUIT MEANS COUPLING SAID FIXED FREQUENCY AND VARIABLE TIMING CIRCUITS TO SAID SWITCHING CIRCUIT TO CONTROL SAID SWITCHING CIRCUIT.
Claim 2
Dependent Claim
142 words
A CONVERTER CIRCUIT FOR RECEIVING AN INPUT VOLTAGE AND PRODUCING AN OUTPUT ELECTRICAL QUANTITY WHICH IS DIFFERENT FROM BUT WHICH IS REPRESENTATIVE OF SAID INPUT VOLTAGE, COMPRISING: A VOLTAGE CONTROLLED OSCILLATOR HAVING AN INPUT CIRCUIT AND HAVING AN OUTPUT CIRCUIT; AN AMPLIFIER HAVING AN OUTPUT CIRCUIT COUPLED TO SAID INPUT CIRCUIT OF SAID VOLTAGE CONTROLLED OSCILLATOR AND HAVING A PAIR OF INPUT CIRCUITS; MEANS COUPLED TO ONE OF SAID INPUT CIRCUITS OF SAID AMPLIFIER FOR COUPLING SAID INPUT VOLTAGE THERETO; A REFERENCE VOLTAGE CIRCUIT; SWITCHING CIRCUIT MEANS COUPLING SAID REFERENCE VOLTAGE CIRCUIT TO THE OTHER OF SAID PAIR OF INPUT CIRCUITS OF SAID AMPLIFIER; A FIXED FREQUENCY TIMING CIRCUIT; A VARIABLE TIMING CIRCUIT COUPLED TO AND CONTROLLED BY SAID VOLTAGE CONTROLLED OSCILLATOR; AND CIRCUIT MEANS COUPLING SAID FIXED FREQUENCY AND VARIABLE TIMING CIRCUITS TO SAID SWITCHING CIRCUIT TO CONTROL SAID SWITCHING 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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |