Patent ID: 7990299
Filing Date: 2011-08-02
Classification: H03M

Abstract:
1. An apparatus comprising: a modulation system configured to generate a first pair of optical signals having a first phase difference and a second pair of optical signals having a second phase difference in response to an input signal, the input signal is selected from one of a voltage signal, a current signal, a frequency signal, and a charge, wherein the first pair of optical signals are combined to form a first optical signal having a first intensity and the second pair of optical signals are combined to form a second optical signal having a second intensity, and wherein the first intensity of the first optical signal reaches a peak at a different time from the second intensity of the second optical signal; an optical detector system coupled to the modulation system, wherein the optical detector system is configured to generate a first electrical signal corresponding to the first intensity of the first optical signal and a second electrical signal corresponding to the second intensity of the second optical signal; and an analog to digital conversion system connected to the optical detector system, wherein the analog to digital conversion system is configured to generate digital data from the first electrical signal and the second electrical signal.