Patent ID: 8378653
Filing Date: 2013-02-19
Classification: G06F

Abstract:
1. A transmitter component with an HDMI (High-Definition Multimedia Interface) port, comprising: A. a plurality of pairs of transition minimized differential signaling (TMDS) drivers, configured to drive corresponding pairs of TMDS data and clock signal lines through the HDMI port; B. tail current circuitry coupled to each of the pairs of TMDS drivers, the tail current circuitry configured to establish a termination current in each of the plurality of TMDS data and clock signal lines and thereby produce a tail current, the tail current circuitry including one transistor for each of the pairs of TMDS drivers for each data and clock signal line, each transistor being coupled between the TMDS drivers and a virtual ground lead, each transistor having a control lead, and the control leads of all of the transistors being connected together and to the control lead of a current mirror transistor; C. a shunt circuit coupled between the virtual ground lead of the tail current circuitry and a ground reference; D. power conversion logic coupled in parallel with the shunt circuitry between the virtual ground lead and the ground reference, the power conversion logic configured to convert a portion of the tail current to form a supply voltage Vdd source; and E. function logic coupled to the power conversion logic and to the plurality of pairs of TMDS drivers, the function logic configured to operate on the Vdd voltage to control the plurality of differential signals.