1. A dual data rate (DDR) output circuit, comprising:
a latch unit configured to latch-in first data with a first level of a clock signal;
a flip-flop configured to latch-in second data in-sync with the first edge of the clock signal; and
a buffer circuit electrically coupled to an output of said latch unit and an output of said flip-flop, said buffer circuit configured to generate the first data at an output terminal of the DDR output circuit in-sync with one edge of the clock signal and further configured to generate the second data at the output terminal in-sync with another edge of the clock signal.
2. The DDR output circuit of claim 1, wherein said flip-flop is a master-slave flip-flop.
3. The DDR output circuit of claim 1, wherein the first edge of the clock signal is a high-to-low edge of the clock signal; and wherein the one edge of the clock signal is a low-to-high edge of the clock signal and the another edge of the clock signal is a high-to-low edge of the clock signal.
4. The DDR output circuit of claim 1, wherein said latch unit is a negative-level triggered latch; and wherein said flip-flop comprises a negative-level triggered master latch and a positive-level triggered slave latch.
5. The DDR output circuit of claim 1, wherein said buffer circuit comprises a first tri-state buffer having an input electrically coupled to the output of said latch unit and a second tri-state buffer having an input electrically coupled to the output of said flip-flop.
6. The DDR output circuit of claim 5, wherein the first tri-state buffer is a non-inverting buffer and the second tri-state buffer is a non-inverting buffer.
7. The DDR output circuit of claim 1 wherein the output of said latch unit is a complementary output; wherein the output of said flip-flop is a complementary output; and wherein the said buffer circuit comprises a first tri-state inverting buffer having an input electrically coupled to the output of said latch unit and a second tri-state inverting buffer having an input electrically coupled to the output of said flip-flop.
8. The DDR output circuit of claim 1, wherein the first edge of the clock signal is a low-to-high edge of the clock signal; and wherein the one edge of the clock signal is a high-to-low edge of the clock signal and the another edge of the clock signal is a low-to-high edge of the clock signal.
9. The DDR output circuit of claim 8, wherein the output of said latch unit is a complementary output; wherein the output of said flip-flop is a complementary output; and wherein the said buffer circuit comprises a first tri-state inverting buffer having an input electrically coupled to the output of said latch unit and a second tri-state inverting buffer having an input electrically coupled to the output of said flip-flop.
10. A dual data rate (DDR) output circuit, comprising:
a single-stage latch unit configured to latch-in first data with a first level of a clock signal;
a dual-stage flip-flop configure to latch-in second data in-sync with the first edge of the clock signal; and
a buffer circuit electrically coupled to an output of said latch unit and an output of said flip-flop, said buffer circuit configured to generate the first data at an output terminal of the DDR output circuit in-sync with one edge of the clock signal and further configured to generate the second data at the output terminal in-sync with another edge of the clock signal.
11. The DDR output circuit of claim 10, wherein said buffer circuit comprises a first tri-state buffer having an input electrically coupled to the output of said latch unit and a second tri-state buffer having an input electrically coupled to the output of said flip-flop.
12. The DDR output circuit of claim 11, wherein the first tri-state buffer is a non-inverting buffer and the second tri-state buffer is a non-inverting buffer.
13. A data output circuit of a double data rate (DDR) semiconductor device comprising:
a first latch circuit outputting an output data corresponding to a first data in response to a first logic level of a clock signal;
a flip-flop circuit latching and outputting a second data in response to a first edge of the clock signal; and
a buffer circuit driving an output terminal in response to the output data of the first latch circuit during a second logic level of the clock signal, driving the output terminal in response to the output data of the flip-flop circuit during the first logic level of the clock signal.
14. The data output circuit of the DDR semiconductor device of claim 13, wherein the flip-flop circuit comprises:
a master latch outputting a data corresponding to the second data in response to the first logic level of the clock signal; and
a slave latch outputting a data corresponding to an output data of the master latch in response to the second logic level of the clock signal.
15. The data output circuit of the DDR semiconductor device of claim 13, wherein the buffer circuit comprises:
a first tri-state buffer buffering or inverting the output data of the first latch circuit and outputting the buffered data or the inverted data during the first logic level of the clock signal; and
a second tri-state buffer buffering or inverting the output data of the slave latch and outputting the buffered data or the inverted data during the second logic level of the clock signal.
16-21. (canceled)
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An absorbent article comprising:
a longitudinally extending centerline;
a transversely extending centerline;
a liquid permeable cover layer having a body facing surface;
a liquid impermeable barrier layer;
an absorbent core arranged adjacent to the cover layer, the absorbent core including an upper surface and a lower surface and a material-free zone extending from the upper surface to the lower surface;
a transfer layer arranged between the core and the barrier layer, the transfer layer including a planar portion having an upper surface and a lower surface and a protrusion extending upwardly from the upper surface;
wherein the cover layer includes a first region arranged in spaced relationship to the transfer layer and a second region arranged in surface to surface contact with the transfer layer;
wherein the protrusion is structured and arranged to be received within, and extend upwardly into the material free zone; and
wherein the protrusion has a height that is less than a distance between the upper surface of the absorbent core and the lower surface of the absorbent core.
2. The absorbent article according to claim 1, wherein the material-free zone is centrally aligned with respect to the longitudinally extending centerline and the transversely extending centerline.
3. The absorbent article according to claim 2, wherein the material-free zone extends over an area between about 400 mm2 and about 6000 mm2.
4. The absorbent article according to claim 3, wherein the material-free zone is substantially elliptical in shape and preferably has a length as measured along the longitudinally extending centerline in the range of about 40 mm to about 250 mm and a width as measured along the transversely extending centerline of about 10 mm to about 60 mm.
5. The absorbent article according to claim 3, wherein the protrusion extends over an area between about 400 mm2 and about 6000 mm2.
6. The absorbent article according to claim 5, wherein the protrusion has a height in the range of between about 0.3 mm to about 20 mm.
7. The absorbent article according to claim 5, wherein the protrusion has a height in the range of between about 0.4 mm to about 19 mm.
8. The absorbent article according to claim 5, wherein the protrusion has a height in the range of between about 0.5 mm to about 18 mm.
9. An absorbent article comprising:
a longitudinally extending centerline;
a transversely extending centerline;
a liquid permeable cover layer having a body facing surface;
a liquid impermeable barrier layer;
an absorbent core arranged adjacent to the cover layer;
the transfer layer including a planar portion having an upper surface and a lower surface and a plurality of protrusion extending upwardly from the upper surface;
wherein the absorbent core includes an upper surface and a lower surface, the absorbent core comprising a plurality of beams and a plurality of material-free zones, each of the beams arranged in a spaced relationship to an adjacent beam and each of the beams being separated from an adjacent beam by a material-free zone, each of the material-free zones extending from the upper surface to the lower surface;
wherein the cover layer includes a plurality of first regions arranged in spaced relationship to the transfer layer and a plurality of second regions, each of the second regions located between two adjacent beams and arranged in surface to surface contact with the transfer layer;
wherein each one of the plurality of protrusions is structured and arranged to be received within, and extend upwardly into one of the plurality of material free zones; and
wherein each protrusion has a height that is less than a distance between the upper surface of the absorbent core and the lower surface of the absorbent core.
10. The absorbent article according to claim 9, wherein each of the material-free zones preferably has a width in the range of between about 1 mm and about 10 mm and a length in the range of between about 40 mm and about 250 mm.
11. The absorbent article according to claim 10, wherein the absorbent article includes between 2 and about 7 longitudinally extending material-free zones and each of the material free zones is spaced from an adjacent material-free zone in the transverse direction by a distance from about 5 mm to about 30 mm.
12. The absorbent article according to claim 11, wherein each of the material-free zones extend over a surface area in the range of between 50 mm2 and about 4000 mm2.
13. The absorbent article according to claim 12, wherein each protrusion has a width in the range of between about 1 mm and about 10 mm and a length in the range of between about 40 mm and about 250 mm.
14. The absorbent article according to claim 13, wherein the absorbent article includes between 2 and about 7 protrusions and each protrusion is spaced from an adjacent protrusion in the transverse direction by a distance from about 5 mm to about 30 mm.
15. The absorbent article according to claim 14, wherein each of the protrusions extend over a surface area in the range of between 50 mm2 and about 4000 mm2.
16. The absorbent article according to claim 15, wherein the protrusion has a height in the range of between about 0.3 mm to about 20 mm.
17. The absorbent article according to claim 16, wherein the protrusion has a height in the range of between about 0.4 mm to about 19 mm.
18. The absorbent article according to claim 17, wherein the protrusion has a height in the range of between about 0.5 mm to about 18 mm.