Patent ID: 11949425
Assignee: XILINX, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The transmit driver circuit of claim 2, wherein the impedance control circuit further comprises:
a voltage divider having a first resistive element, a second resistive element, and a third resistive element coupled in series;
a first amplifier having a first input coupled to a first tap of the voltage divider and having a second input coupled to a first terminal of the tunable impedance and to a first output of the differential output pair of the replica driver slice, wherein the first tap of the voltage divider is coupled to the first resistive element and the second resistive element; and
a second amplifier having a first input coupled to a second tap of the voltage divider and having a second input coupled to a second terminal of the tunable impedance and to a second output of the differential output pair of the replica driver slice, wherein the second tap of the voltage divider is coupled to the second resistive element and the third resistive element.