Time division communication system

Claim 2

In a time division communication system wherein a plurality of time slots occurs in repetitive cycles having at least one communication path, an incomming time division bus and an outgoing time division bus, a circuit for coupling signals between said communication path and said incoming and outgoing buses in a distinct time slot comprising first storing means, means for applying a signal from said incoming bus to said first storing means in said distinct time slot, second storing means, first means for coupling the signal in said first storing means to said second storing means, second means connected between said first coupling means and said communication path for coupling the signal from said first coupling means to said communication path, third storing means connected to said communication path and to said second coupling means for storing the coupled first storing means signal and the signal outgoing from said communication path, means operative in said distinct time slot for serially connecting said second and third storing means to cancel the coupled first storing means signal in said second storing means with the coupled first storing means signal in said third storing means, and third means operative in said distinct time slot for coupling the communication path outgoing signal from said connected second and third storing means to said outgoing bus.

Claim 3

In a time division comMunication system wherein a plurality of time slots occurs in repetitive cycles having at least one communication path, an incoming time division bus and an outgoing time division bus, a circuit according to claim 1 further comprising means for coupling the communication path outgoing signal from said outgoing bus to said incoming bus and means connected between said third coupling means and said first storing means for applying the communication path outgoing signal from said third coupling means to said first storing means, said first storing means comprising means operative in said distinct time slot for sbutracting the communication path outgoing signal applied from said third coupling means from the signal applied from said incoming bus.

Claim 4

In a time division communication system wherein a plurality of time slots occurs in repetitive cycles having at least one communication path, an incoming time division bus and an outgoing time division bus, a circuit according to claim 1 further comprising means operative in said distinct time slot for disconnecting said second storing means from said first coupling means, and means operative in said distinct time slot for disconnecting said third storing means from said second coupling means.

Claim 5

A time division communication system wherein a plurality of time slots occurs in repetitive cycles comprising a plurality of communication paths, first and second common buses, means for generating a control signal, each communication path having an associated circuit including first storing means responsive to said control signal being applied to said associated circuit for storing a first signal from said first common bus, second storing means, first means normally connected between said first and second storing means for coupling the signal in said first storing means to said second storing means, second means for coupling the first storing means signal from said first coupling means to said associated communication path, third storing means normally connected to said second coupling means and to said associated communication path for storing the coupled first storing means signal and the signal outgoing from said communication path, means responsive to said control signal being applied to said associated circuit for serially connecting said second and third storing means to cancel the first storing means signal in said second storing means with the first storing means signal in said third storing means, means responsive to said control signal being applied to said associated circuit for coupling the communication path outgoing signal from said series connected second and third storing means to said second common bus, means connected from said third coupling means to said first storing means for applying said stored communication path outgoing signal to said first storing means, and means for exchanging signals among a plurality of selected communication path circuits in a distinct time slot comprising means for applying said control signal to each selected communication path circuit in said distinct time slot and means connected from said second bus to said first bus responsive to the communication path outgoing signals from said selected communication path circuits on said second bus for producing a signal corresponding to the sum of said communication path outgoing signals and for applying said produced signal as said first signal to said first common bus in said distinct time slot.

Claim 6

A time division communication system wherein a plurality of time slots occurs in repetitive cycles comprising a plurality of communication paths, first and second common buses, means for generating a control signal, each communication path having an associated circuit including first storing means responsive to said control signal being applied to said associated circuit for storing a first signal from said first common bus, second storing means, first means normally connected between said first and second storing means for coupling the signal in said first storing means to said second storing means, second means for coupling the first storing means signal from said first coupling means to said associated communication path, third storing means normally connected to said second coupling means and to said associated communication path for storing the coupled first storing means signal and the signal outgoing from said communication path, means responsive to said control signal being applied to said associated circuit for serially connecting said second and third storing means to cancel the first storing means signal in said second storing means with the first storing means signal in said third storing means, means responsive to said control signal being applied to said associated circuit for coupling the communication path outgoing signal from said series connected second and third storing means to said second common bus, means connected from said third coupling means to said first storing means for applying said stored communication path outgoing signal to said first storing means, and means for exchanging signals among a plurality of selected communication path circuits in a distinct time slot comprising means for applying said control signal to each selected communication path circuit in said distinct time slot and means connected from said second bus to said first bus responsive to the communication path outgoing signals from said selected communication path circuits on said second bus for producing a signal corresponding to the sum of said communication path outgoing signals and for applying said produced signal as said first signal to said first common bus in said distinct time slot.

Claim 7

A time division communication system according to claim 4 further comprising means responsive to said control signal for disconnecting said second storing means from said first coupling means and for disconnecting said third storing means from said second coupling means.

Claim 8

A time division communication system wherein a plurality of time slots occurs in repetitive cycles according to claim 5 wherein said producing means comprises a circuit for summing the selected communication path outgoing signals in said distinct time slot and means for applying The sum of said selected communication path outgoing signals to said first common bus.

Claim 9

A time division communication system wherein a plurality of time slots occurs in repetitive cycles according to claim 5, and wherein said first storing means comprises means for subtracting the stored communication path outgoing signal from the first signal.

Claim 10

A time division communication system wherein a plurality of time slots occurs in repetitive cycles according to claim 5 wherein said control signal generating means comprises a control circuit including means for producing control codes and a plurality of registers, each register being connected to a corresponding communication path circuit and comprising means for receiving a control code corresponding to a selected connection in said distinct time slot from said control circuit, means for storing said control code, and means responsive to said stored control code for generating and applying a control signal to the connected communication path circuit in the distinct time slot of each repetitive cycle.

Claim 11

A time division communication system wherein a plurality of time slots occurs in repetitive cycles according to claim 8 wherein said register receiving means comprises means for inserting a pulse into said register in said distinct time slot of a repetitive cycle prior to the transfer of signals between said selected stations, said register storing means comprises means for recirculating said inserted pulse once in each repetitive cycle, and said register generating and applying means comprises means responsive to said recirculated pulse for applying a pair of control pulses to said communication path circuit in the distinct time slot of each repetitive cycle.

Claim 12

A time division communication system wherein a plurality of time slots occurs in repetitive cycles comprising a plurality of stations, first and second common buses, means for generating control signals, each station having an associated circuit including first, second and third storage capacitors, means responsive to a control signal from said generating means for applying a first signal from said first common bus to said first storage capacitor, first means for coupling said first storage capacitor signal from said first storage capacitor to said second storage capacitor including first switching means normally connected to said second storage capacitor, second means for coupling said first storage capacitor signal from said first coupling means to said associated station and to said third storage capacitor and for coupling the associated station outgoing signal to said third storage capacitor, said second coupling means including second switching means normally connected to said third storage capacitor, said first and second switching means being operative in response to said control signal to disconnect said second storage capacitor from said first coupling means and to disconnect said third storage capacitor from said second coupling means, fourth switching means responsive to said control signal for serially connecting said second and third storage capacitors to cancel the signal stored in said second and third storage capacitor derived from said first storage capacitor signal, third means responsive to said control signal for coupling said station outgoing signal in said serially connected second and third storage capacitors to said second common bus, and means for exchanging signals among a plurality of selected station circuits in a distinct time slot comprising means for applying said control signal to said selected station circuits in said distinct time slot, means connected from said second common bus to said third common bus for summing the station outgoing signals on said second common bus in said distinct time slot and means for applying said summing means output to said first common bus as said first signal in said distinct time slot.

Claim 13

A time division communication system wherein a plurality of time slots occurs in repetitive cycles comprising a plurality of stations, first and second common buses, means for generating control signals, each station having an associated circuit including first, second and third storage capacitors, means responsive to a control signal from said generating means for applying a first signal from said first common bus to said first storage capacitor, first means for coupling said first storage capacitor signal from said first storage capacitor to said second storage capacitor including first switching means normally connected to said second storage capacitor, second means for coupling said first storage capacitor signal from said first coupling means to said associated station and to said third storage capacitor and for coupling the associated station outgoing signal to said third storage capacitor, said second coupling means including second switching means normally connected to said third storage capacitor, said first and second switching means being operative in response to said control signal to disconnect said second storage capacitor from said first coupling means and to disconnect said third storage capacitor from said second coupling means, fourth switching means responsive to said control signal for serially connecting said second and third storage capacitors to cancel the signal stored in said second and third storage capacitor derived from said first storage capacitor signal, third means responsive to said control signal for coupling said station outgoing signal in said serially connected second and third storage capacitors to said second common bus, and means for exchanging signals among a plurality of selected station circuits in a distinct time slot comprising means for applying said control signal to said selected station circuits in said distinct time slot, means connected from said second common bus to said third common bus for summing the station outgoing signals on said second common bus in said distinct time slot and means for applying said summing means output to said first common bus as said first signal in said distinct time slot.

Claim 14

A time division communication system according to claim 10 wherein each storage capacitor includes fIrst and second terminals, said first coupling means comprises a first amplifier having an input and first and second outputs, said amplifier being operative in response to a signal on said input to provide equal and opposite phase signals on said first and second outputs, said first amplifier input being connected to said first storage capacitor first terminal, said first storage capacitor second terminal being connected to said third coupling means, said first amplifier first output being connected to said second storage capacitor first terminal via said first switching means, and said second storage capacitor second terminal being connected to a reference potential.

Claim 15

A time division communication system according to claim 11 wherein each of said stations has two terminals, said second coupling means comprises a second amplifier having first and second inputs and first and second outputs, said second amplifier first input being connected to said first amplifier first output, said second amplifier second input being connected to said first amplifier second output, said second amplifier first output being connected to one terminal of said associated station and being further connected to said third storage capacitor first terminal via said second switching means, said second amplifier second output being connected to the other terminal of said associated station and being further connected to said third storage capacitor second terminal via said second switching means.

Claim 16

A time division communication system according to claim 12 wherein said third coupling means comprises a third amplifier having an input connected to said third storage capacitor first terminal and an output, an impedance having one terminal connected to said second common bus and a fifth switching means connected between said third amplifier output and the other terminal of said impedance.

Claim 17

A time division communication system according to claim 10 wherein each station has two terminals, each storage capacitor includes first and second terminals, said first switching means comprising first and second switching devices, and said first coupling means comprises a first amplifier having an input and first and second outputs, said amplifier being operative in response to a signal on said input to provide equal and opposite phase signals on said first and second outputs, said first amplifier input being connected to said first storage capacitor first terminal, said first storage capacitor second terminal being connected to said third coupling means, said first switching device being responsive to said control signal to connect said first amplifier first output to said second storage capacitor first terminal, said second switching device being responsive to said control signal to connect said first amplifier second output to said second storage capacitor second terminal.

Claim 18

A time division communication system according to claim 14 wherein said second switching means comprises third and fourth switching devices, said second coupling means comprises a second amplifier having first and second inputs and first and second outputs, said second amplifier first input being connected to said first amplifier first output, said second amplifier second input being connected to said first amplifier second output, said second amplifier first output being connected to one terminal of said associated station and being further connected to said third storage capacitor first terminal via said third switching device, said second amplifier second output being connected to the other terminal of said associated station and being further connected to said third storage capacitor second terminal via said fourth switching device.

Claim 19

A time division communication system according to claim 15 wherein said fourth switching means comprises fifth and sixth switching devices, said fifth switching device being responsive to said control signal to connect said third storage device first terminal to a reference potential; said sIxth switching device being responsive to said control signal for connecting said third storage capacitor first terminal to said second storage capacitor first terminal, and said third coupling means comprising a third amplifier having an input and an output, said third amplifier input being connected to said second storage capacitor second terminal, an impedance having one terminal connected to said second common bus, and fifth switching means responsive to said control signal for connecting said third amplifier output to the other terminal of said impedance.

Claim 20

A time division communication system according to claim 11 wherein said second switching means comprises first and second switching devices, said second coupling means comprises a second amplifier having first and second inputs and first and second outputs, said second amplifier first input being connected to said first amplifier first output, said second amplifier second input being connected to said first amplifier second output, said second amplifier first output being connected to one terminal of said associated station and being further connected to said third storage capacitor first terminal via said first switching device, said second amplifier second output being connected to the other terminal of said associated station and being further connected to said third storage capacitor second terminal via said second switching device.

Claim 21

A time division communication system according to claim 17 wherein said second amplifier comprises a pair of opposite conductive type IGFET devices, each having a gate electrode, a source electrode and a drain electrode, one IGFET device gate electrode being the second amplifier first input, the other IGFET device gate electrode being the second amplifier input, the one IGFET device drain electrode being said second amplifier first output, the other IGFET device drain electrode being said second amplifier second output and the one IGFET device source electrode directly connected to the other IGFET device source electrode.

Claim 22

A time division communication system according to claim 18 wherein said fourth switching means comprises third and fourth switching devices, said third switching device being responsive to said control signal for connecting said second storage capacitor first terminal to said third storage capacitor second terminal, said third coupling means comprising a third amplifier having an input and an output, said fourth switching device being responsive to said control signal for connecting said third amplifier input to said third storage capacitor first terminal, an impedance having one terminal connected to said second common bus and fifth switching means responsive to said control signal for connecting said third amplifier output to the other terminal of said impedance.

Claim 23

A time division communication system wherein a plurality of time slots occurs in repetitive cycles, comprising a plurality of stations, first and second common buses, means for generating a control signal, each station having an associated circuit including first, second and third stores, means responsive to a control signal from said generating means for applying a signal from said first common bus to said first store, first means for coupling the signal in said first store to said second store, second means for coupling the first store signal from said first coupling means to said associated station and to said third store whereby the first store signal is transferred to said third store and said associated station and the signal outgoing from said associated station is transferred to said third store, means responsive to said control signal for serially connecting said second and third stores, and third coupling means responsive to said control signal for coupling said outgoing station signal from said serially connected second and third stores to said second common bus, and means for exchanging signals among a plurality of stations in a distinct time slot comprising meaNs for applying said control signal to each selected station circuit in a distinct time slot, and means connected between said second and first common buses for summing the outgoing station signals from said selected stations on said second bus and for applying the resulting sum signal to said first common bus whereby the sum signal is applied to each selected station first store.

Claim 24

A time division communication system wherein a plurality of time slots occurs in repetitive cycles, comprising a plurality of stations, first and second common buses, means for generating a control signal, each station having an associated circuit including first, second and third stores, means responsive to a control signal from said generating means for applying a signal from said first common bus to said first store, first means for coupling the signal in said first store to said second store, second means for coupling the first store signal from said first coupling means to said associated station and to said third store whereby the first store signal is transferred to said third store and said associated station and the signal outgoing from said associated station is transferred to said third store, means responsive to said control signal for serially connecting said second and third stores, and third coupling means responsive to said control signal for coupling said outgoing station signal from said serially connected second and third stores to said second common bus, and means for exchanging signals among a plurality of stations in a distinct time slot comprising meaNs for applying said control signal to each selected station circuit in a distinct time slot, and means connected between said second and first common buses for summing the outgoing station signals from said selected stations on said second bus and for applying the resulting sum signal to said first common bus whereby the sum signal is applied to each selected station first store.

Claim 25

A time division communication system according to claim 20 further comprising means for connecting said third coupling means to said first store, said first store comprising means for subtracting the station outgoing signal from said third coupling means from the sum signal applied to said first store from said first common bus.

Claim 26

A time division communication system according to claim 21 wherein each of said first, second and third stores comprises a storage capacitor having first and second terminals, said first coupling means comprises a coupling device connected between said first storage capacitor first terminal and said second storage capacitor first terminal, said second storage capacitor second terminal being connected to a reference potential, said second coupling means comprising a first amplifier having an input and first and second outputs, said first amplifier being responsive to the signal applied to said input for producing equal and opposite phase signals on said first and second outputs, means for coupling said first and second outputs to said associated station and to said third storage capacitor first and second terminals, said serially connected means comprising first and second switching devices, said first switching device being responsive to said control signal for connecting said second storage capacitor first terminal to said third storage capacitor second terminal, said second switching device being responsive to said control signal for connecting said third storage capacitor first terminal to the input of said second amplifier and said third coupling means further comprising an impedance having one terminal connected to said second common bus, a third switching device responsive to said control signal for connecting said second amplifier output to the other terminal of said impedance, and said means for connecting the third coupling means to said first store comprising means for connecting said second amplifier output to the second terminal of said first store.