Patent ID: 7622957

Claim:
A circuit for transmitting an output signal, said circuit comprising: a first impedance operative to receive a first voltage, wherein said first impedance comprises first resistor circuitry whose resistance is adjustable responsive to a voltage of a first resistance control signal; switching circuitry coupled to said first impedance, said switching circuitry comprising a first path and a second parallel path, said switching circuitry operative to receive first and second differential input signals at said first and second paths, respectively, and to generate said output signal at a node in only one of said paths, without generating another output signal in another of said paths, in response to receipt of said first and second differential input signals; and a second impedance coupled to said switching circuitry and operative to receive a second voltage, wherein said second impedance comprises second resistor circuitry whose resistance is adjustable responsive to a voltage of a second resistance control signal.