Output driver robust to data dependent noise

摘要

Techniques for controlling a driver to reduce data dependent noise, such as simultaneous switching effects and cross-talk effects. A plurality of drivers may each receive a data segment to transmit and a plurality of data segments that other drivers will transmit. A driver controller may adjust the time at which the data segment is transmitted in response to the plurality of data segments that the other drivers will transmit. The adjustment may compensate for simultaneous switching noise and cross-talk by, for example, delaying the transmission of a data segment or changing the slew rate of the signal carrying the data segment.

主权项

1. A method, comprising:
receiving, using a first controller of a first driver circuit in a memory device, a first data segment from a first sub-pre-pre-driver of the first driver circuit; receiving, using the first controller, a second data segment from a first sub-pre-driver of the first driver circuit, wherein the first sub-pre-pre-driver and the first sub-pre-driver sequentially amplify a first sequence of data before transmission by the first driver circuit; receiving, using the first controller, a third data segment from a second sub-pre-pre-driver of a second driver circuit of the memory device; receiving, using the first controller, a fourth data segment from a second sub-pre-driver of the second driver circuit, wherein the second sub-pre-pre-driver and the second sub-pre-driver sequentially amplify a second sequence of data before transmission by the second driver circuit; predicting, using the first controller, a degree to which data dependent noise is expected to delay transmission of the first sequence of data, the second sequence of data, or both in a plurality of transmission lines based at least in part on the first data segment, the second data segment, the third data segment, and the fourth data segment; and adjusting, using the first controller, a first operational parameter of the first driver circuit used to transmit the first sequence of data based on the degree.