US 12,136,918 B2
Driver system for reducing common mode noise due to mismatches in differential signal path
Srijan Rastogi, Bangalore (IN); Sumantra Seth, Bangalore (IN); and Baher Haroun, Allen, TX (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by Texas Instruments Incorporated, Dallas, TX (US)
Filed on Jul. 25, 2022, as Appl. No. 17/872,841.
Prior Publication US 2024/0030900 A1, Jan. 25, 2024
Int. Cl. H03F 3/45 (2006.01); H03K 3/01 (2006.01)
CPC H03K 3/01 (2013.01) [H03F 3/45475 (2013.01); H03F 3/45479 (2013.01); H03F 3/45488 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A driver system comprising:
a line driver comprising:
a first input;
a second input;
a first output; and
a second output;
a first termination resistor having a first terminal and second terminal, the first terminal of the first termination resistor coupled to the second output of the line driver;
a second termination resistor having a first terminal and second terminal, the first terminal of the second termination resistor coupled to the first output of the line driver;
a first amplifier stage coupled to the line driver wherein the first amplifier applies a DC voltage across the second output of the line driver and the first output of the line driver; and
a second amplifier stage AC-coupled to the second terminal of the first termination resistor and the second terminal of the second termination resistor;
wherein the first amplifier stage comprises:
a first input coupled to the first output of the line driver and the the second output of the line driver; and
a non-inverting second input adapted to be coupled to a reference first voltage.