Patent ID: 7068693

Claim:
A driver circuit for burst mode transmission, for enabling a transmitter to output a data signal abruptly at an operating bias in accordance with an enabling signal, and disabling said transmitter from working at said operating bias in accordance with a disabling signal, said driver circuit comprising: a continuous-mode driving element, wherein said continuous-mode driving element is electrically connected to said transmitter and provides said operating bias and a substantially zero bias value to said transmitter; a first resistor having a first resistance value; a second resistor having a second resistance value which is different from said first resistance value of said first resistor; and a switch having a bias-control terminal, a resistor-selecting terminal and a resistor-output terminal, wherein said bias-control terminal is used for receiving said enabling signal and said disabling signal; wherein, when said bias-control terminal receives said enabling signal, said resistor-selecting terminal and said first resistor are electrically conductcd, and said first resistance value is supplied to said continuous-mode driving element via said resistor-output terminal, and said continuous-mode driving element is enabled to supply said operating bias abruptly to said transmitter, and when said bias-control terminal receives said disabling signal, said resistor-selecting terminal and said second resistor are electrically conducted, and said second resistance value is supplied to said continuous-mode driving element via said resistor-output terminal, and said continuous-mode driving element is stopped supplying said operating bias to said transmitter.