Patent ID: 6580263
Filing Date: 2003-06-17
Classification: H04B

Abstract:
A bit rate discrimination device having a temperature compensation function, comprising:a photoelectric converter operable to convert an input optical signal into an electric signal; a bit rate detector for detecting a bit rate of the optical signal from the electric signal and for outputting a discrimination signal indicating the bit rate; a DC (Direct Current) amplifier for outputting a bit rate detection signal by amplifying the discrimination signal; a temperature detector for detecting an operating temperature of the DC amplifier and for outputting a temperature signal indicating the detected operating temperature; a variation amplifier for outputting a temperature compensation signal by amplifying a voltage level difference between the temperature signal and a predetermined reference signal; a voltage adder for outputting a temperature-compensated bit rate detection signal by combining the bit rate detection signal with the temperature compensation signal; and, a bit rate discriminator for determining a bit rate of the input optical signal depending on a voltage level of the temperature-compensated bit rate detection signal.