A pseudo-differential current-mode interface with point-to-point cascade bus architecture (WiseBus™) for large panel LCD systems

A new point-to-point cascade bus architecture and pseudo-differential current signaling present, which is called WiseBus™. The proposed transmitter using capacitive coupling error cancellation and fast cut-off scheme compensates an inherent charge error and duty error of output current. The receiver makes high common noise rejection between reference and data using perfectly matched gain-enhanced regulated cascode buffer. The advantage of proposed interface is very low power consumption and low EMI using small current signal (±100μA) and small signal loop area, and it is suitable for large size LCD TV due to point-to-point cascade bus configuration.