US3887799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asynchronous n bit position data shifter
Assignee: Individual
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Filing: 1973-12-03
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Granted: 1975-06-03
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Expires: 1993-12-03
Abstract
Abstract An asynchronous data bit shifter for shifting a data word to the left or right depending on the value of the shift select word. A matrix of tri-state gates arranged in columns and rows and wired in a staggered combination performs the shifting. The matrix will shift an input data word directly to any output word position by addressing the appropriate shift select word.
Inventors
- 👤 Theodore P Lindgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:21
CPC Classifications
G; G06; G06F; G06F5/00; G06F5/01; G06F5/015
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
139 words
An asynchronous data bit shifter for shifting a data word to the left or right depending on the value of the shift select word said shifter comprising: a. a first input means for receiving a carry signal input, b. a second input means for receiving a data signal input, c. a third input means for receiving a control signal input, d. a matrix of tri-state gates, one-half of said gates having their inputs connected to said second input means and the other half of said gates having their inputs connected to said first input means, the control elements of said gates being coupled to said third input means so that input data coupled to said first and second input means can be asynchronously shifted right and left in response to a command signal applied to said third input means.
Claim 2
Dependent Claim
139 words
An asynchronous data bit shifter for shifting a data word to the left or right depending on the value of the shift select word said shifter comprising: a. a first input means for receiving a carry signal input, b. a second input means for receiving a data signal input, c. a third input means for receiving a control signal input, d. a matrix of tri-state gates, one-half of said gates having their inputs connected to said second input means and the other half of said gates having their inputs connected to said first input means, the control elements of said gates being coupled to said third input means so that input data coupled to said first and second input means can be asynchronously shifted right and left in response to a command signal applied to said third input means.
Claim 3
Dependent Claim
139 words
An asynchronous data bit shifter for shifting a data word to the left or right depending on the value of the shift select word said shifter comprising: a. a first input means for receiving a carry signal input, b. a second input means for receiving a data signal input, c. a third input means for receiving a control signal input, d. a matrix of tri-state gates, one-half of said gates having their inputs connected to said second input means and the other half of said gates having their inputs connected to said first input means, the control elements of said gates being coupled to said third input means so that input data coupled to said first and second input means can be asynchronously shifted right and left in response to a command signal applied to said third input means.
Claim 4
Dependent Claim
139 words
An asynchronous data bit shifter for shifting a data word to the left or right depending on the value of the shift select word said shifter comprising: a. a first input means for receiving a carry signal input, b. a second input means for receiving a data signal input, c. a third input means for receiving a control signal input, d. a matrix of tri-state gates, one-half of said gates having their inputs connected to said second input means and the other half of said gates having their inputs connected to said first input means, the control elements of said gates being coupled to said third input means so that input data coupled to said first and second input means can be asynchronously shifted right and left in response to a command signal applied to said third input means.
Claim 5
Dependent Claim
68 words
The data shifter of claim 1 wherein said matrix consists of columns and rows of tri-state gates, said input means for receiving data signals being connected to one-half of the inputs of said tri-state gates for shifting data signals applied thereto to the left and means for coupling data signals to the said other half of the inputs of said tri-state gates for shifting data to the right.
Claim 6
Dependent Claim
82 words
The data shifter of claim 1 wherein in a shift left mode of operation the first input means for receiving carry signals is coupled to the inputs of said gates for one-half of the matrix and the second input means for receiving data signal is coupled to the inputs of said gates for the other half of said matrix and in a shift right mode of operation the carry and data signals coupled to said first and second input means are reversed.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |