Patent ID: 7573298
Filing Date: 2009-08-11
Classification: G06F,Y02D

Abstract:
1. A signal transmission circuit transmitting signals via a differential pair including first and second signal lines, comprising: a current source installed between a first power source and a node; a first switching element installed between the first signal line and the node; a second switching element installed between the second signal line and the node; a current control circuit varying a value of a current that flows through the current source, wherein the first and second signal lines are operated by the current from the current source via the first and second switching elements, the current being varied by the current control circuit; a first buffer outputting a first transmission control signal to the gate of a first transistor formed in the first switching element; and a second buffer outputting a second transmission control signal to the gate of a second transistor formed in the second switching element, wherein, if either of the first transmission control signal and the second transmission control signal is set active, the other of the control signals is set non-active; wherein the first and second buffers each include: