US3621283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for converting a physical pattern into an electric signal as a function of time utilizing an analog shift register
Assignee: US Philips Corp
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Filing: 1969-04-17
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Granted: 1971-11-16
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Expires: 1989-04-17
Abstract
Abstract A device for converting energy patterns in the form of pressure, heat or magnetic images into an electrical signal as a function of time where the necessity for a scanning beam or a crossed bar readout system is eliminated by cascading elements which function as both storage and energy sensitive devices and by providing circuitry for shifting the charges of the energy sensitive storage elements in a single direction along the cascaded array.
Inventors
- 👤 Kees Teer
- 👤 Frederik Leonard Joha Sangster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:17
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/891; H10D84/895; H04; H04N; H04N25/00; H04N25/70; H04N25/76; H04N25/767; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/15; H10F39/153
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
294 words
A device for converting an energy pattern into an electrical signal as a function of time, comprising a plurality of serially connected pickup elements; each of said elements comprising an input terminal, an output terminal, at least two semiconductor switchEs each having input, output and control terminals, a capacitor connected in parallel with the control and input terminals of each of the semiconductor switches in each pickup element, an energy-sensitive conduction path means connected in parallel with each capacitor for discharging each capacitor at a rate determined by the amount of energy incident thereon, means for connecting the output terminal of a first of the semiconductor switches in each element to an input terminal of a second semiconductor switch in each element, means for connecting the input terminal of the first semiconductor switch in each element to the input terminal of that element, means for connecting the output terminal of the second semiconductor switch of each element to the output terminal of that element; the device further comprising an external semiconductor switch having input, output and control terminals, means for connecting the output terminal of the external semiconductor switch to the input terminal of a pickup element on an end of the plurality of serially connected pickup elements, an external capacitor connected to the input terminal of the external semiconductor switch, means for providing a first alternating switching voltage to the control terminal of each of the first semiconductor switches in each element, means for providing a second alternating switching voltage to the control terminal of the external semiconductor switch and to the control terminals of each second semiconductor switch in each element, and means for providing a third alternating voltage in phase with said second alternating switching voltage for charging said external capacitor.
Claim 2
Independent Claim
294 words
A device for converting an energy pattern into an electrical signal as a function of time, comprising a plurality of serially connected pickup elements; each of said elements comprising an input terminal, an output terminal, at least two semiconductor switchEs each having input, output and control terminals, a capacitor connected in parallel with the control and input terminals of each of the semiconductor switches in each pickup element, an energy-sensitive conduction path means connected in parallel with each capacitor for discharging each capacitor at a rate determined by the amount of energy incident thereon, means for connecting the output terminal of a first of the semiconductor switches in each element to an input terminal of a second semiconductor switch in each element, means for connecting the input terminal of the first semiconductor switch in each element to the input terminal of that element, means for connecting the output terminal of the second semiconductor switch of each element to the output terminal of that element; the device further comprising an external semiconductor switch having input, output and control terminals, means for connecting the output terminal of the external semiconductor switch to the input terminal of a pickup element on an end of the plurality of serially connected pickup elements, an external capacitor connected to the input terminal of the external semiconductor switch, means for providing a first alternating switching voltage to the control terminal of each of the first semiconductor switches in each element, means for providing a second alternating switching voltage to the control terminal of the external semiconductor switch and to the control terminals of each second semiconductor switch in each element, and means for providing a third alternating voltage in phase with said second alternating switching voltage for charging said external capacitor.
Claim 3
Dependent Claim
57 words
A device as claimed in claim 1, wherein each of the semiconductor switches in each pickup unit comprises a metal oxide transistor, wherein each of the capacitors in the pickup units each comprise a PN-junction of an associated MOS transistor, and wherein the radiation sensitive conduction path means comprises a photosensitive boundary layer of the MOS transistor.
Claim 4
Dependent Claim
56 words
A device as claimed in claim 1, further comprising an additional row of serially connected pickup elements, an additional external semiconductor switch connected to one end of said additional row of pickup units, means for connecting the semiconductor switch to the external capacitor, and means for alternately energizing said first and said second external semiconductor switches.
Claim 5
Dependent Claim
21 words
A device as claimed in claim 1, wherein all of the semiconductor switches are integrated into a single integrated semiconductor body.
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |