Telecommunications device
The present disclosure relates to a telecommunications jack including a housing having a port for receiving a plug. The jack also includes a plurality of contact springs adapted to make electrical contact with the plug when the plug is inserted into the port of the housing, and a plurality of wire termination contacts for terminating wires to the jack. The jack further includes a circuit board that electrically connects the contact springs to the wire termination contacts. The circuit board includes a multi-zone crosstalk compensation arrangement for reducing crosstalk at the jack.
1. A telecommunications device comprising:
a housing defining a port for receiving a plug;
a plurality of contact springs adapted to make electrical contact with the plug when the plug is inserted into the port of the housing;
a plurality of wire insulation displacement contacts for terminating wires to the device;
a circuit board including conductive tracks that electrically connect the contact springs to the wire termination contacts, the circuit board including a first conductive layer, a second conductive layer, and a third conductive layer, the first and second conductive layers separated by a first dielectric layer and the second and third conductive layers separated by a second dielectric layer; and
a cross talk compensation arrangement that provides crosstalk compensation between selected tracks of the circuit board, the crosstalk compensation arrangement including a capacitive coupling of a first zone of compensation positioned a first time delay away from a source of crosstalk located at the plug, a capacitive coupling of a second zone of compensation positioned a second time delay away from the first zone of compensation, and a capacitive coupling of a third zone of compensation positioned a third time delay away from the second zone of compensation;
the first zone of compensation including a first set of opposing capacitor plates positioned at the first and second conductive layers;
the second zone of compensation including a second set of opposing capacitor plates positioned at the first and second conductive layers; and
the third zone of compensation including a third set of opposing capacitor plates positioned at the first and second conductive layers and interdigitated capacitor fingers positioned at the third conductive layer.
2. The telecommunications device of claim 1 , wherein the interdigitated capacitor fingers are aligned with the third set of opposing capacitor plates of the third zone of compensation.
3. The telecommunications device of claim 1 , wherein the first set of capacitor plates includes capacitor plates of different sizes.
4. The telecommunications device of claim 1 , wherein at least one of the capacitor plates in the first set of capacitor plates includes a stub.
5. The telecommunications device of claim 1 , wherein the third time delay is the same as the first time delay.
6. The telecommunications device of claim 5 , wherein the second time delay is larger than the first time delay.
7. The telecommunications device of claim 1 , wherein the first zone of compensation includes first and second sets of opposing capacitor plates.
8. The telecommunications device of claim 7 , wherein the second zone of compensation includes third and fourth sets of opposing capacitor plates.
9. The telecommunications device of claim 8 , wherein the first, second, third, and fourth sets of opposing capacitor plates are each electrically connected across different pairs of tracks.
10. The telecommunications device of claim 8 , wherein the first set of capacitor plates are relatively sized to reduce registration requirements.
11. A telecommunications device adapted to receive a plug, the telecommunications device having a compensation arrangement that compensates for cross talk generated at the plug, the telecommunications device comprising:
a housing defining a port for receiving the plug;
first, second, third, fourth, fifth, sixth, seventh and eighth consecutively arranged contact springs adapted to make electrical contact with the plug when the plug is inserted into the port of the housing;
first, second, third, fourth, fifth, sixth, seventh and eighth wire insulation displacement contacts for terminating wires to the device;
a circuit board including first, second, third, fourth, fifth, sixth, seventh and eighth conductive paths that respectively electrically connect the first, second, third, fourth, fifth, sixth, seventh and eighth contact springs to the first, second, third, fourth, fifth, sixth, seventh and eighth wire termination contacts; and
a cross talk compensation arrangement that provides crosstalk compensation between selected tracks of the circuit board, the crosstalk compensation arrangement including a capacitive coupling of a first zone of compensation positioned a first time delay away from a source of crosstalk located at the plug, a capacitive coupling of a second zone of compensation positioned a second time delay away from the first zone of compensation, and a capacitive coupling of a third zone of compensation positioned a third time delay away from the second zone of compensation;
the first zone of compensation including a first set of opposing capacitor plates positioned at the first and second conductive layers;
the second zone of compensation including a second set of opposing capacitor plates positioned at the first and second conductive layers; and
the third zone of compensation including a third set of opposing capacitor plates positioned at the first and second conductive layers and interdigitated capacitor fingers positioned at the third conductive layer.
12. The telecommunications device of claim 11 , wherein the first set of opposing capacitor plates includes a first capacitor plate electrically connected to the third conductive path and a second capacitor plate electrically connected to the fifth conductive path and positioned opposing the first capacitor plate.
13. The telecommunications device of claim 12 , wherein the second set of opposing capacitor plates includes a third capacitor plate electrically connected to the third conductive path and a fourth capacitor plate electrically connected to the fourth conductive path and positioned opposing the third capacitor plate.
14. The telecommunications device of claim 13 , wherein the first set of opposing capacitor plates includes a fifth capacitor plate electrically connected to the fourth conductive path and a sixth capacitor plate electrically connected to the sixth conductive path and positioned opposing the fifth capacitor plate.
15. The telecommunications device of claim 14 , wherein the second set of opposing capacitor plates includes a seventh capacitor plate electrically connected to the fifth conductive path and a eighth capacitor plate electrically connected to the sixth conductive path and positioned opposing the seventh capacitor plate.
16. The telecommunications device of claim 15 , wherein the third set of opposing capacitor plates includes a ninth capacitor plate electrically connected to the third conductive path and a tenth capacitor plate electrically connected to the fifth conductive path and positioned opposing the ninth capacitor plate.
17. The telecommunications device of claim 16 , wherein the third set of opposing capacitor plates includes an eleventh capacitor plate electrically connected to the fourth conductive path and a twelfth capacitor plate electrically connected to the fifth conductive path and positioned opposing the eleventh capacitor plate.
18. The telecommunications device of claim 11 , further comprising a return loss capacitive coupling between the third conductive path and the sixth conductive path.
19. The telecommunications device of claim 18 , further comprising a second return loss capacitive coupling between the fourth conductive path and the fifth conductive path.