Patent US4900115A successfully refreshed from Google Patents.
US4900115A
Expired / Lapsed
US
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Optical logic circuit useful for bit serial optic computing
Assignee: University of Colorado Foundation Inc
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Filing: 1989-01-31
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Granted: 1990-02-13
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Expires: 2009-01-31
Abstract
Abstract Optical elements are combined into modules capable of performing logic functions in response to light pulses which are received from a source as clock pulses or data pulses. The module is effectively an all optical switching network. An optical delay line provides optical memory. The pulses that are produced at the delay line output are restored by selective reentry of light pulses from a continuously operable source so that the pulse information is storable indefinitely. The module is useful for a variety of computer and computer related design functions.
Inventors
- 👤 Vincent P. Heuring
- 👤 Harry F. Jordan
- 👤 Jonathan P. Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:25
CPC Classifications
G; G02; G02F; G02F3/00; G02F1/00; G02F1/29; G02F1/31; G02F1/313; G02F1/3136; G06; G06E; G06E1/00; G06E1/02; G06E1/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
127 words
Apparatus for performing optical logic functions comprising a source of light pulses, an optical switch including first and second input terminals with said first terminal coupled for receiving light pulses from said source, at least one optical waveguide establishing an optical output terminal, and an electrode responsive to light at said second input terminal for directing light at said first input terminal into said optical waveguide, and an optical delay line coupled to receive light pulses from said waveguide and to deliver said light pulses at said second input terminal after passage of a predetermined time period, whereby introduction of a light pulse to said delay line results in continual rejuvenation of said light pulse by gating subsequent pulses from said source into said optical delay line.
Claim 2
Dependent Claim
127 words
Apparatus for performing optical logic functions comprising a source of light pulses, an optical switch including first and second input terminals with said first terminal coupled for receiving light pulses from said source, at least one optical waveguide establishing an optical output terminal, and an electrode responsive to light at said second input terminal for directing light at said first input terminal into said optical waveguide, and an optical delay line coupled to receive light pulses from said waveguide and to deliver said light pulses at said second input terminal after passage of a predetermined time period, whereby introduction of a light pulse to said delay line results in continual rejuvenation of said light pulse by gating subsequent pulses from said source into said optical delay line.
Claim 3
Dependent Claim
23 words
Apparatus in accordance with claim 1 wherein said optical delay line has a length for concurrently retaining a plurality of said light pulses.
Claim 4
Dependent Claim
46 words
Apparatus in accordance with claim 1 wherein light pulses from said source represent a series of data bits which are continuously recycled through said delay line, said apparatus further including light data utilization means, and means coupling said data bits into said light data utilization means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-12 | 1993-08-14 | 1994-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-12 | 1997-08-14 | 1998-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-12 | 2001-08-14 | 2002-02-13 | $7700.00 | Window Closed / Lapsed |