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US4556955A
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Single crystal dual microprocessor computing system
Assignee: Bendix Corp
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Filing: 1983-05-27
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Granted: 1985-12-03
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Expires: 2003-05-27
Abstract
Abstract A single crystal (100) dual microprocessor (26, 28) computing system utilizes a single frequency determining element (100) connected across the input pins of one of the microprocessors (26) and the output (102) of the element is connected to one input pin of the second microprocessor (28). The second pin of the second microprocessor (28) is connected to electrical ground (106). This configuration reduces the effective output impedance and results in higher oscillator amplitudes.
Inventors
- 👤 Danny O. Wright
- 👤 Robert E. Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:24
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/24; F02D41/26; F02D41/266; G; G06; G06F; G06F1/00; G06F1/04; G06F1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A single crystal dual microprocessor computing system comprising: a plurality of signal generating devices, each device generating an electrical signal having an informational value; a plurality of output devices each actuable by one or more control signals; dual microprocessors electrically connected in parallel, each receiving at least a portion of the electrical signals from said generating devices and operable for calculating control signals for actuating one or more output devices according to control laws stored in said microprocessors and information supplied from said electrical signals; said microprocessors each having a first and second clock input terminals; and a single crystal element having an output lead and a return lead, said output lead electrically connected to said first clock input terminals of said dual microprocessors, said return lead electrically connected to said second clock input terminal of said first of said dual microprocessors, and said second clock input of said second of said dual microprocessors connected to electrical ground, whereby said first microprocessor operates as a master microprocessor for synchronizing said second microprocessor to said first microprocessor.
Claim 2
Dependent Claim
176 words
A single crystal dual microprocessor computing system comprising: a plurality of signal generating devices, each device generating an electrical signal having an informational value; a plurality of output devices each actuable by one or more control signals; dual microprocessors electrically connected in parallel, each receiving at least a portion of the electrical signals from said generating devices and operable for calculating control signals for actuating one or more output devices according to control laws stored in said microprocessors and information supplied from said electrical signals; said microprocessors each having a first and second clock input terminals; and a single crystal element having an output lead and a return lead, said output lead electrically connected to said first clock input terminals of said dual microprocessors, said return lead electrically connected to said second clock input terminal of said first of said dual microprocessors, and said second clock input of said second of said dual microprocessors connected to electrical ground, whereby said first microprocessor operates as a master microprocessor for synchronizing said second microprocessor to said first microprocessor.
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) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |