Patent ID: 6909082

Claim:
An automatic threshold control device for a burst mode optical receiver, the burst mode optical receiver including a converter for converting a burst mode signal into a voltage signal and an automatic gain controller for automatically controlling a gain of the converter, independently generating a reset signal and applying it to said automatic threshold control device, said automatic threshold control device detecting a voltage level of an output signal from the converter, said automatic threshold control device comprising: a peak detector that detects a peak level of the output signal from the converter in response to the reset signal; a bottom level detector that detects a bottom level of the output signal from the converter in response to the reset signal; a pair of resistors each having two terminals, one terminal of each resistors being connected respectively to said peak detector and bottom level detector and the other terminals of each resistor being connected to each other, wherein a reference voltage can be generated at a point where the other terminals of each resistor are connected to each other on the basis of voltages of said peak level and bottom level; and a capacitor for storing said reference voltage.