Patent ID: 9201103
Filing Date: 2015-12-01
Classification: G01R

Abstract:
1. A method of determining (i) a DC level or component in an AC signal or (ii) a DC offset of AC-coupled circuitry that receives the AC signal, wherein the AC-coupled circuitry is included in an optical or optoelectronic transmitter or transceiver configured to receive or provide the AC signal, the method comprising: driving said optical or optoelectronic transmitter with said AC signal or providing said AC signal from a signal detector in said optical or optoelectronic transceiver: disabling said AC signal or disconnecting said AC signal from said optical or optoelectronic transmitter or said signal detector; sampling said disabled or disconnected AC signal to obtain sampled DC values of said disabled or disconnected AC signal; and obtaining or measuring said DC level, component or offset from said sampled DC values of said AC signal.