US 12,087,393 B2
Multi-driver signaling
Peter Mayer, Neubiberg (DE); Rethin Raj, Augsburg (DE); Nobuyuki Umeda, Tokyo (JP); Andreas Schneider, Gernlinden (DE); and Casto Salobrena Garcia, Munich (DE)
Assigned to Micron Technology, Inc., Boise, ID (US)
Filed by Micron Technology, Inc., Boise, ID (US)
Filed on Apr. 13, 2022, as Appl. No. 17/719,486.
Claims priority of provisional application 63/181,835, filed on Apr. 29, 2021.
Prior Publication US 2022/0350522 A1, Nov. 3, 2022
Int. Cl. G11C 7/10 (2006.01)
CPC G11C 7/1084 (2013.01) [G11C 7/1057 (2013.01)] 30 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a first voltage source configured to supply a positive voltage;
a first driver configured to couple a transmission line of a bus with the first voltage source and configured to transfer current to the transmission line based at least in part on a configurable resistance of the first driver;
a second voltage source configured to supply a negative voltage;
a second driver configured to couple the transmission line of the bus with the second voltage source, the second driver configured to transfer current from the transmission line of the bus based at least in part on a configurable resistance of the second driver; and
logic coupled with the first driver and the second driver, and configured to:
concurrently activate the first driver and the second driver to generate a termination voltage at the transmission line, the termination voltage between a highest two levels and a lowest two levels of a pulse-amplitude-modulation (PAM) scheme that comprises four voltage levels, wherein the termination voltage is maintained while the first driver and the second driver are activated.