US 12,308,830 B2
Post-driver with low voltage operation and electrostatic discharge protection
Chin-Hua Wen, Toufen Township, Miaoli County (TW)
Assigned to Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu (TW)
Filed by Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu (TW)
Filed on Nov. 22, 2023, as Appl. No. 18/517,024.
Application 18/517,024 is a continuation of application No. 17/828,581, filed on May 31, 2022, granted, now 11,855,613.
Prior Publication US 2024/0088883 A1, Mar. 14, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H03K 19/0175 (2006.01); H03F 3/45 (2006.01); H03K 17/08 (2006.01); H03K 19/0185 (2006.01); H03K 5/24 (2006.01)
CPC H03K 17/08 (2013.01) [H03F 3/45269 (2013.01); H03K 19/017545 (2013.01); H03K 19/018557 (2013.01); H03K 5/24 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A post-driver structure, comprising:
a drive unit comprising a replica pull-up driver and a replica pull-down driver;
a pad configured to connect to an external resistor and a first node of the replica pull-up driver;
a first multiplexer, wherein a first node of the replica pull-up driver is connected to a first input terminal of the first multiplexer, wherein a second node of the pull-down driver is connected to a second input terminal of the first multiplexer;
a comparator, wherein an output terminal of the first multiplexer is connected to the comparator; and
a second multiplexer, wherein a first input terminal of the second multiplexer is connected to an output terminal of the comparator, wherein a second input terminal of the second multiplexer is connected to the output terminal of the comparator through an inverter, and wherein an output terminal of the second multiplexer is connected to a calibration output circuit.