Patent ID: 7346278

Claim:
Circuitry for monitoring the operation of an optoelectronic transceiver, said circuitry comprising: a sequence of interconnected signal processing circuits for processing an analog input signal and producing a digital result signal, where said analog signal represents one or more operating conditions of the optoelectronic transceiver, said sequence of signal processing circuits including: gain circuitry configured to amplify or attenuate said analog input signal by a gain value to produce a scaled analog signal; an analog to digital converter configured to convert said scaled analog signal into a first digital signal; digital adjustment circuitry for digitally adjusting said first digital signal to produce said digital result signal, said digital adjustment circuitry including shifting circuitry configured to shift an input digital signal in accordance with a shift value so as to produce a digital shifted signal; and memory configured to store values of said digital result signal in predefined locations accessible by a host, wherein said circuitry is contained within the optoelectronic transceiver, and wherein said analog signal comprises a sequence of analog signals representing a plurality of operating conditions, including laser bias current, laser output power and received power, of the optoelectronic transceiver, said gain value comprises a sequence of gain values, each corresponding to a respective analog signal in the sequence of analog signals, and said shift value comprises a sequence of shift values, each corresponding to a respective analog signal in the sequence of analog signals.