Method to vertically align multi-level cells
View Patent ↗Methods, systems, and devices for improving uniformity between levels of a multi-level signal are described. Techniques are provided herein to unify vertical alignment between data transmitted using multi-level signaling. Such multi-level signaling may be configured to capture transmitted data during a single clock cycle of a memory controller. An example of multi-level signaling scheme may be pulse amplitude modulation (PAM). Each unique symbol of the multi-level signal may be configured to represent a plurality of bits of data.
1. An apparatus, comprising:
a multi-leg driver that comprises a first plurality of legs and a second plurality of legs, wherein the first plurality of legs is configured to output first data that includes at least one bit and the second plurality of legs is configured to output second data that includes at least one bit, wherein the first plurality of legs is associated with a first bit having a first magnitude and the second plurality of legs is associated with a second bit having a second magnitude, and wherein the first magnitude is greater than the second magnitude;
a first multiplexer coupled with the first plurality of legs;
a second multiplexer coupled with the second plurality of legs;
a controller coupled with the multi-leg driver, the controller being configured to determine a timing offset between the first data and the second data; and
a first delay component coupled with the first plurality of legs of the multi-leg driver, the first delay component being configured to adjust a timing output of the first data based at least in part on the timing offset.
2. The apparatus of claim 1 , further comprising:
a second delay component coupled with the second plurality of legs of the multi-leg driver, the second delay component being configured to adjust a timing output of the second data based at least in part on the timing offset.
3. The apparatus of claim 1 , wherein the first delay component is a variable delay component located between the controller and the first multiplexer.
4. The apparatus of claim 1 , wherein the first delay component is configured to adjust the timing output of the first data relative to a timing output of the second data.
5. The apparatus of claim 1 , further comprising:
a transmitter in electronic communication with the multi-leg driver, the transmitter configured to transmit each of the first data and the second data, wherein each of the first data and the second data includes multiple bits.
6. The apparatus of claim 1 , further comprising:
a plurality of resistive components in electronic communication with at least one of the first plurality of legs and at least one of the second plurality of legs.