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US3852723A
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Programmable signal distribution system
Assignee: International Business Machines Corp
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Filing: 1973-11-23
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Granted: 1974-12-03
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Expires: 1993-11-23
Abstract
Abstract A programmable signal distribution system is provided having a plurality of signal inputs at different times, any one or more of which may be connected to any one or more of a plurality of outputs. An array of switches are connected between the plurality of inputs and the outputs. A memory cell is connected to each of the switches and means are provided for writing a signal into each of the memory cells. The signals stored in the memory cells are utilized to open or close the associated switch when enabled thereby connecting any one or more of said inputs to a selected plurality of outputs.
Inventors
- 👤 W Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:08
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/15; H03K5/151; G; G06; G06F; G06F1/00; G06F1/04; G06F1/10; H03K5/01; H03K5/04; H03K5/05; H03K5/13; H03K5/131; H10; H10D; H10D62/00; H10D62/10; H10D62/124; H10D62/126; H10W; H10W20/00; H10W20/40
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
A programmable signal distribution system comprising: a plurality of inputs and a plurality of outputs; an array of crosspoint switches connected between said inputs and said outputs; a memory cell connected to each of said crosspoint switches; means for writing a signal into each of said memory cells determinative of the condition of the respective crosspoint switch; and means for enabling the opEration of each of said crosspoint switches to provide an output in accordance with said signal stored in said respective memory cell thereby connecting said respective inputs to said respective outputs.
Claim 2
Dependent Claim
93 words
A programmable signal distribution system comprising: a plurality of inputs and a plurality of outputs; an array of crosspoint switches connected between said inputs and said outputs; a memory cell connected to each of said crosspoint switches; means for writing a signal into each of said memory cells determinative of the condition of the respective crosspoint switch; and means for enabling the opEration of each of said crosspoint switches to provide an output in accordance with said signal stored in said respective memory cell thereby connecting said respective inputs to said respective outputs.
Claim 3
Dependent Claim
50 words
A programmable signal distribution system in accordance with claim 1 wherein said plurality of inputs and outputs are paired and have input signals applied thereto in pairs, one signal applied to one input of each pair of inputs being the complement of the other signal of the pair of inputs.
Claim 4
Dependent Claim
48 words
A programmable signal distribution system in accordance with claim 2, wherein said array of crosspoint switches comprise pairs of AND circuits, each AND circuit of each pair receiving one of said input signals of a respective pair of input signals and said signal from the respective memory cell.
Claim 5
Dependent Claim
43 words
A programmable signal distribution system in accordance with claim 2, wherein each output of each pair of outputs is dot OR''ed with the corresponding output of the other pairs of outputs to produce the desired complementary output signal of said pairs of outputs.
Claim 6
Dependent Claim
65 words
A programmable signal distribution system, according to claim 1, wherein said memory cell is a (two stage) flip-flop circuit the one condition of which represents the storage of a 1 and the other condition of which represents the storage of a 0, each stage of the flip-flop having an output carrying the complimentary output signal to the signal on the output of the other stage.
Claim 7
Dependent Claim
53 words
A programmable signal distribution system according to claim 1, wherein said means for writing into each of said memory cells includes a shift register for receiving address data and decoding driver means for decoding the address in the shift register so that a write signal input is stored in the addressed memory cell.
Claim 8
Dependent Claim
49 words
A programmable signal distribution system according to claim 6, wherein said signal written into the addressed memory cell renders the respective crosspoint switch conductive or non-conductive so that signals applied thereto from said input are passed or not passed according to the value of said signal written into memory.
Claim 9
Dependent Claim
37 words
A programmable signal distribution system according to claim 1, wherein input signals applied to said input are clock pulses at different times, the clock pulses time being connected by the closed crosspoint switches to the respective outputs.
Claim 10
Dependent Claim
61 words
A programmable signal distribution system according to claim 6, wherein said means for decoding the address from said shift register includes a word decoder for selecting the row of the addressed memory cell and a bit decoder for selecting the column of the addressed memory cell, the crossing point of said row and column having the addressed memory cell associated therewith.
References Cited (Backward Citations)
US3164810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |