Off-chip driver

An off-chip driver, configured in an integrated circuit, comprising:

• a pull-up driver, coupled to an output pad of the integrated circuit;
• and
• a pull-down driver, coupled to the output pad,
• wherein one of the pull-up driver and the pull-down driver comprises:
• a first main driving circuit, used to perform an output driving operation on the output pad;
• at least one first auxiliary driving circuit, used to selectively perform the output driving operation on the output pad;
• a first connection circuit, coupled to a driving terminal of the first main driving circuit and a driving terminal of each of the at least one first auxiliary driving circuit;
• and
• a first common impedance, having a first terminal coupled to the first connection circuit, wherein the first terminal of the first common impedance is coupled to the driving terminal of the first main driving circuit and the driving terminal of each of the at least one first auxiliary driving circuit through the first connection circuit, and a second terminal of the first common impedance is coupled to the output pad,
• wherein the first connection circuit comprises:
• a resistor, having a first terminal coupled to the driving terminal of each of the at least one first auxiliary driving circuit, wherein a second terminal of the resistor is coupled to the driving terminal of the first main driving circuit and the first terminal of the first common impedance.

An off-chip driver, configured in an integrated circuit, comprising:

• a pull-up driver, coupled to an output pad of the integrated circuit;
• and
• a pull-down driver, coupled to the output pad,
• wherein one of the pull-up driver and the pull-down driver comprises:
• a first main driving circuit, used to perform an output driving operation on the output pad;
• at least one first auxiliary driving circuit, used to selectively perform the output driving operation on the output pad;
• a first connection circuit, coupled to a driving terminal of the first main driving circuit and a driving terminal of each of the at least one first auxiliary driving circuit;
• and
• a first common impedance, having a first terminal coupled to the first connection circuit, wherein the first terminal of the first common impedance is coupled to the driving terminal of the first main driving circuit and the driving terminal of each of the at least one first auxiliary driving circuit through the first connection circuit, and a second terminal of the first common impedance is coupled to the output pad,
• wherein the first connection circuit comprises:
• a resistor string, having a plurality of connection nodes, wherein the driving terminal of the first main driving circuit is coupled to one of the connection nodes, the at least one first auxiliary driving circuit is coupled to at least one of the connection nodes, and the first terminal of the first common impedance is coupled to one of the connection nodes.