US4038581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for elimination of surface charge integration
Assignee: RCA Corp
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Filing: 1975-11-12
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Granted: 1977-07-26
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Expires: 1995-11-12
Abstract
Abstract Circuit to apply an offset voltage to be added to a charge storage signal depositing a charge on a radially swept charge storage surface so that the charge storage signal is a minimum at the center of the surface and a maximum at the outer edges of the sweep. This reduces or eliminates the charge integration in the area where the sweep lines converge.
Inventors
- 👤 Denis Peter Dorsey
- 👤 William E. Rodda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:46
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/58; H01J29/00; H01J29/46; H01J29/70; H01J29/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
The combination comprising: surface charge storage means for recording data by charging a surface; charge deposit means for charging said surface in response to signals to be stored; sweep means for radially positioning said charge deposit means from the center of the surface in response to a sweep signal; and control means for varying charge intensity as a function of the distance of the charge deposit means from the center of the surface, said control means comprising integrator means responsive to a blanking signal preceding each sweep signal for producing an output signal and adder means responsive to data signals and to said output signal.
Claim 2
Dependent Claim
105 words
The combination comprising: surface charge storage means for recording data by charging a surface; charge deposit means for charging said surface in response to signals to be stored; sweep means for radially positioning said charge deposit means from the center of the surface in response to a sweep signal; and control means for varying charge intensity as a function of the distance of the charge deposit means from the center of the surface, said control means comprising integrator means responsive to a blanking signal preceding each sweep signal for producing an output signal and adder means responsive to data signals and to said output signal.
References Cited (Backward Citations)
US2501110A
Cited
US2768323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |