US3358130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Function generator
Assignee: Hitachi Ltd
•
Filing: 1964-02-05
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Granted: 1967-12-12
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Expires: 1984-02-05
Abstract
No abstract record available.
Inventors
- 👤 Miura Takeo
- 👤 Yokozawa Norio
- 👤 Iwata Junzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:47
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/26; G06G7/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
A FUNCTION GENERATOR COMPRISING: A LINEAR SEGMENT APPROXIMATION FUNCTION GENERATOR; VOLTAGE DIVIDERS TO PRODUCE ELECTRICAL SIGNALS WHICH ARE PROPORTIONAL TO THE XAND Y-COORDINATES OF THE BREAK POINTS OF THE FUNCTION FORM FORMED BY A PLURALITY OF LINEAR SEGMENTS; A SETTING DEVICE TO SET THE DIVIDING RATIOS OF SAID VOLTAGE DIVIDERS IN ACCORDANCE WITH THE FUNCTION FORM; A SIGNAL GENERATOIR TO GENERATE A SIGNAL RESULTING FROM SUPERIMPOSITION OF AN OSCILLATION WAVEFORM ON A CONSTANT DIRECT CURRENT; AN ADDITIONAL CIRCUIT TO ADD THE OUTPUT OF SAID SIGNAL GENERATOR TO SAID ELECTRICAL SIGNAL TO BE PROPORTIONAL TO THE X-COORDINATE AND TO APPLY AN ADDITIONAL OUTPUT RESULTING FROM THIS ADDITION TO SAID FUNCTION GENERATOR; AN OPERATIONAL CIRCUIT TO CALCULATE AN ADDITIONAL SIGNAL RESULTING FROM ADDITION OF SAID Y-COORDINATE, AND THE PRODUCT OF THE OUTPUT OF SAID SIGNAL GENERATOR AND THE SLOPE OF SAID LINEAR SEGMENT; A SUBTRACTOR TO OBTAIN THE DIFFERENCE SIGNAL BETWEEN THE OUTPUT OF SAID FUNCTION GENERATOR AND THE OUTPUT OF SAID OPERATIONAL CIRCUIT; AND AN ADJUSTING MEANS TO ADJUST THE BREAK POINTS AND SLOPES OF THE LINEAR SEGMENTS IN SAID FUNCTION GENERATOR IN ORDER TO CAUSE SAID DIFFERENCE SIGNAL TO BECOME ZERO.
Claim 2
Dependent Claim
191 words
A FUNCTION GENERATOR COMPRISING: A LINEAR SEGMENT APPROXIMATION FUNCTION GENERATOR; VOLTAGE DIVIDERS TO PRODUCE ELECTRICAL SIGNALS WHICH ARE PROPORTIONAL TO THE XAND Y-COORDINATES OF THE BREAK POINTS OF THE FUNCTION FORM FORMED BY A PLURALITY OF LINEAR SEGMENTS; A SETTING DEVICE TO SET THE DIVIDING RATIOS OF SAID VOLTAGE DIVIDERS IN ACCORDANCE WITH THE FUNCTION FORM; A SIGNAL GENERATOIR TO GENERATE A SIGNAL RESULTING FROM SUPERIMPOSITION OF AN OSCILLATION WAVEFORM ON A CONSTANT DIRECT CURRENT; AN ADDITIONAL CIRCUIT TO ADD THE OUTPUT OF SAID SIGNAL GENERATOR TO SAID ELECTRICAL SIGNAL TO BE PROPORTIONAL TO THE X-COORDINATE AND TO APPLY AN ADDITIONAL OUTPUT RESULTING FROM THIS ADDITION TO SAID FUNCTION GENERATOR; AN OPERATIONAL CIRCUIT TO CALCULATE AN ADDITIONAL SIGNAL RESULTING FROM ADDITION OF SAID Y-COORDINATE, AND THE PRODUCT OF THE OUTPUT OF SAID SIGNAL GENERATOR AND THE SLOPE OF SAID LINEAR SEGMENT; A SUBTRACTOR TO OBTAIN THE DIFFERENCE SIGNAL BETWEEN THE OUTPUT OF SAID FUNCTION GENERATOR AND THE OUTPUT OF SAID OPERATIONAL CIRCUIT; AND AN ADJUSTING MEANS TO ADJUST THE BREAK POINTS AND SLOPES OF THE LINEAR SEGMENTS IN SAID FUNCTION GENERATOR IN ORDER TO CAUSE SAID DIFFERENCE SIGNAL TO BECOME ZERO.
References Cited (Backward Citations)
US3066251A
Cited
US3191017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |