Patent ID: 8324936
Filing Date: 2012-12-04
Classification: H03K

Abstract:
1. A differential current driving type transmitter comprising: a current source configured to source currents to a pair of transmission lines and sink currents flowing through the pair of transmission lines; a current direction selecting block configured to transfer a current flowing from the current source to a first transmission line of the pair of transmission lines and a current flowing through a second transmission line of the pair of transmission lines to the current source; a balancing switch block configured to initialize the pair of transmission lines to a balanced state, wherein the current source comprises a current supply source which has one terminal connected to a first voltage and the other terminal connected to a first terminal of the current direction selecting block, and a current sink which has one terminal connected to a second voltage and the other terminal connected to a second terminal of the current direction selecting block, wherein the balancing switch block comprises a balancing switch which has one terminal connected to the first transmission line and the other terminal connected to the second transmission line and a resistor component which is disposed between the second transmission line and the balancing switch, a value of the resistor component capable of being changed, and wherein the transmitter further comprises a pre-emphasis circuit comprising: