DIRECTIONAL NONRETURN TO ZERO COMPUTER BUSSING SYSTEM

• US 3,619,504 A
• Filed: 12/24/1969
• Issued: 11/09/1971
• Est. Priority Date: 01/13/1967
• Status: Expired due to Term

• Current Assignee: Howard H. Nick, John A De Veer
• Original Assignee: Howard H. Nick, John A De Veer
• Inventors: De Veer, John A., Nick, Howard H.
• Primary Examiner(s): Safourek, Benedict V.
• Application Number:
  US04/887,965
• Time in Patent Office: 685 Days
• Field of Search: 340/147R,147CV,147CN 178/58,58.1,59,60,61,67,68,50,70 333/6,8,10,24 325/51,52,53,54,308,26,15
• US Class Current: 375/257
• CPC Class Codes: G06F 13/4072 Drivers or receivers G06F13/4086 takes precedence; for multistate logic circuits H03K19/0002
• CPC Class Codes: H03H 7/48 Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source phase shifters providing two or more output signals H03H7/21

Abstract

A high-speed data transmission network employing data representations as changes in voltage along a transmission line. Directional coupling elements are spaced along the transmission line to couple information from the transmission line to stub lines. Each stub line is connected to a receiver circuit designed to interpret pulses on the stub line as one binary state and no pulses on the stub line as a second binary state.

Claims

1. A high-speed data transmission network comprising:

a driver means having an output for placing data upon a transmission line wherein one binary state is transmitted by a change in the driver output and a second binary state is transmitted by no change in the driver output;

a transmission line connected to the output of said driver means;

at least one directional coupler located longitudinally along said transmission line, each directional coupler having an output stub upon which data is coupled from said transmission line to said stub; and

a receiver circuit for each stub, each receiver circuit having an output and each connected to a single stub and responsive to either positive or negative pulses on said stub to output one binary state and to output the other binary state in response to no pulses on said stub.

2. The high-speed data transmission network of claim 1 wherein said directional couplers are tricouplers.

3. A high-speed data transmission network comprising:

at least one stub line;

a driver means for each stub line and having an output connected to one stub line, said driver means for placing data upon a stub line wherein one binary state is transmitted by a change in the driver output and a second binary state is transmitted by no change in the driver output;

a transmission line;

a directional coupler connected to each stub line and spaced along said transmission line, each directional coupler for coupling data from a connected stub line to said transmission line; and

at least one receiver circuit connected to said transmission line, each receiver circuit having an output representing two binary states, said receiver circuit responding to positive and negative pulses on said transmission line to output one binary state and responding to no pulses on said transmission line to output a second binary state.

4. The high-speed data transmission network of claim 3 wherein said directional couplers are tricouplers.

5. A high-speed data transmission network comprising:

N driver means, where N is a positive integer greater than 1, each having an output for placing data upon a transmission line wherein one binary state is transmitted by a change in the driver output and the other binary state transmitted by no change in the driver output;

N transmission lines, each transmission line connected to the output of one driver means;

P directional couplers, where P is a positive integer, and where each coupler is spaced along each of said transmission lines, each directional coupler having an output to which signals are coupled from said transmission line;

P stub Means, each connected to the output of N directional couplers, each directional coupler connected to said stub means being spaced along a different transmission line; and

P receiver circuits, each connected to one stub means and each receiver having an output, said receiver responsive to either positive or negative pulses on the connected stub means to output one binary state and responsive to no pulses on the connected stub means to output the other binary state.

6. The high-speed data transmission network of claim 5 wherein said directional couplers are tricouplers.