Transmitting-and-receiving apparatus for performing data transmission through common bus

Claim 2

In a system wherein a plurality of transmitting-and-receiving stations are connected to a bus for performing data communication among said stations through the common bus, each of said transmitting-and-receiving stations comprising signal transmitting means for transmitting data to said bus, first coupling means including a first magnetic core arrayed so that said bus penetrates substantially through the center thereof, and a first winding wound about said first core and having a signal from said signal transmitting means supplied thereto, signal receiving means for receiving data on said bus, second coupling means including a second magnetic core arrayed so that said bus penetrates substantially through the center thereof, and a second winding wound about said second core and providing an output signal to said signal receiving means, and a conductor line arranged so as to penetrate substantially through the centers of said first and second magnetic cores with both ends thereof being terminated with terminal impedance elements respectively.

Claim 3

In a system wherein a plurality of transmitting-and-receiving stations are connected to a bus for performing data communication among said stations through the common bus, each of said transmitting-and-receiving stations comprising signal transmitting means for transmitting data to said bus, signal receiving means for receiving data on said bus, first coupling means including a first magnetic core arrayed so that said bus penetrates substantially through the center thereof, and a first winding wound about said core and supplied with a signal from said signal transmitting means, and first and second transformers, each having a primary and secondary winding, with the primary windings interposed between ground and the portions of the bus located on both sides of the bus part penetrating through said first magnetic core, the outputs of the secondary windings of said transformers being differentially applied to said signal receiving means.

Claim 4

In a system wherein a plurality of transmitting-and-receiving stations are connected to a bus for performing data communication among said stations through the common bus, each of said transmitting-and-receiving stations comprising signal transmitting means for transmitting data to said bus, signal receiving means for receiving data on said bus, first coupling means including a first magnetic core arrayed so that said bus penetrates substantially through the center thereof, and a first winding wound about said core and supplied with a signal from said signal transmitting means, and first and second transformers, each having a primary and secondary winding, with the primary windings interposed between ground and the portions of the bus located on both sides of the bus part penetrating through said first magnetic core, the outputs of the secondary windings of said transformers being differentially applied to said signal receiving means.

Claim 5

In a system wherein a plurality of transmitting-and-receiving stations are connected to bus for performing data communiCation among said stations through the common bus, each of said transmitting-and-receiving stations comprising signal transmitting means for transmitting data signals to said bus, first coupling means including a first magnetic core arrayed so that said bus penetrates substantially through the center thereof, and a first winding would about said first core and having a signal from said signal transmitting means supplied thereto, second coupling means including a second magnetic core arrayed so that said bus penetrates substantially through the center thereof, and a second winding which is wound around said second core, comparator circuit means including a third magnetic core, a third winding wound around said third core, and a conductor line penetrating substantially through the center of both the first and third magnetic cores with both ends thereof being terminated with terminal impedance elements respectively, and signal receiving means supplied with a signal of the difference between an output signal of said second winding and an output signal of said third winding.

Claim 6

In a system wherein a plurality of transmitting-and-receiving stations are connected to bus for performing data communiCation among said stations through the common bus, each of said transmitting-and-receiving stations comprising signal transmitting means for transmitting data signals to said bus, first coupling means including a first magnetic core arrayed so that said bus penetrates substantially through the center thereof, and a first winding would about said first core and having a signal from said signal transmitting means supplied thereto, second coupling means including a second magnetic core arrayed so that said bus penetrates substantially through the center thereof, and a second winding which is wound around said second core, comparator circuit means including a third magnetic core, a third winding wound around said third core, and a conductor line penetrating substantially through the center of both the first and third magnetic cores with both ends thereof being terminated with terminal impedance elements respectively, and signal receiving means supplied with a signal of the difference between an output signal of said second winding and an output signal of said third winding.

Claim 7

In a system wherein a plurality of transmitting-and-receiving stations are connected to a bus for performing data communication among said stations through the common bus, each of said transmitting-and-receiving stations comprising signal transmitting means for transmitting data to said bus, signal receiving means for receiving data on said bus, first coupling means including a first magnetic core arrayed so that said bus penetrates substantially through the center thereof, and a first winding wound about said core and supplying an output signal to said signal receiving means, and first and second transformers having primary and secondary windings interposed between ground and the portions of the bus located on both sides of the bus part penetrating through said first magnetic core, and output from said signal transmitting device being applied to the primary windings of said transformers, the primary and secondary windings being connected so as to transmit equal output signals on both sides of said magnetic core.

Claim 8

In a system wherein a plurality of transmitting-and-receiving stations are connected to a bus for performing data communication among said stations through the common bus, each of said transmitting-and-receiving stations comprising signal transmitting means for transmitting data to said bus, signal receiving means for receiving data on said bus, first coupling means including a first magnetic core arrayed so that said bus penetrates substantially through the center thereof, and a first winding wound about said core and supplying an output signal to said signal receiving means, and first and second transformers having primary and secondary windings interposed between ground and the portions of the bus located on both sides of the bus part penetrating through said first magnetic core, and output from said signal transmitting device being applied to the primary windings of said transformers, the primary and secondary windings being connected so as to transmit equal output signals on both sides of said magnetic core.