US3137825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-phase electronic signal generator
Assignee: Avtron Manufacturing Inc
•
Filing: 1960-03-28
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Granted: 1964-06-16
•
Expires: 1980-03-28
Abstract
No abstract record available.
Inventors
- 👤 Haner Lambert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:12
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/20; H03B27/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A VARIABLE FREQUENCY MULTI-PHASE SIGNAL GENERATOR COMPRISING AN OSCILLATOR INCLUDING THREE OPERATIONAL AMPLIFIERS CONNECTED IN A RING CONFIGURATION WHEREIN TWO OF SAID AMPLIFIERS HAVING SUBSTANTIALLY UNITY GAIN AND 90* PHASE SHIFT AT AN ADJUSTABLE FREQUENCY AND ONE OF SAID AMPLIFIERS HAS SUBSTANTIALLY UNITY GAIN AND 180* PHASE SHIFT, SAID RING CONFIGURATION THEREBY FORMING A SYNTHESIZED RESONANT CIRCUIT PROVIDING QUADRATURE SIGNALS AS THE OUTPUTS OF SAID AMPLIFIERS, MEANS FOR INTRODUCING A REGENERATIVE SIGNAL INTO ONE OF SAID AMPLIFIERS IN ORDER TO MAINTAIN OSCILLATIONS IN SAID SYNTHESIZED RESONANT CIRCUIT, AND A PLURALITY OF PHASE AMPLIFIERS HAVING RESISTANCE INPUT NETWORKS AND GAIN STABILIZED BY RESISTANCE FEEDBACK, SAID PHASE AMPLIFIERS TRANSMITTING PREDETERMINED FRACTIONS OF SAID QUADRATURE SIGNALS SELECTED TO COMBINE VECTORALLY TO PRODUCE THE DESIRED MULTIPHASE SIGNALS.
Claim 2
Dependent Claim
123 words
A VARIABLE FREQUENCY MULTI-PHASE SIGNAL GENERATOR COMPRISING AN OSCILLATOR INCLUDING THREE OPERATIONAL AMPLIFIERS CONNECTED IN A RING CONFIGURATION WHEREIN TWO OF SAID AMPLIFIERS HAVING SUBSTANTIALLY UNITY GAIN AND 90* PHASE SHIFT AT AN ADJUSTABLE FREQUENCY AND ONE OF SAID AMPLIFIERS HAS SUBSTANTIALLY UNITY GAIN AND 180* PHASE SHIFT, SAID RING CONFIGURATION THEREBY FORMING A SYNTHESIZED RESONANT CIRCUIT PROVIDING QUADRATURE SIGNALS AS THE OUTPUTS OF SAID AMPLIFIERS, MEANS FOR INTRODUCING A REGENERATIVE SIGNAL INTO ONE OF SAID AMPLIFIERS IN ORDER TO MAINTAIN OSCILLATIONS IN SAID SYNTHESIZED RESONANT CIRCUIT, AND A PLURALITY OF PHASE AMPLIFIERS HAVING RESISTANCE INPUT NETWORKS AND GAIN STABILIZED BY RESISTANCE FEEDBACK, SAID PHASE AMPLIFIERS TRANSMITTING PREDETERMINED FRACTIONS OF SAID QUADRATURE SIGNALS SELECTED TO COMBINE VECTORALLY TO PRODUCE THE DESIRED MULTIPHASE SIGNALS.
References Cited (Backward Citations)
US2633534A
Cited
US2819442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |