发明名称 |
Current-Mode Driver with Built-In Continuous-Time Linear Equalization |
摘要 |
According to one embodiment of the present disclosure, a current-mode driver with built-in CTLE provides signal correction for a transmitter. The current-mode driver includes a digital current source operable to use a data signal to produce a main current signal. The current-mode driver also includes a filtering circuit comprising a resistor and a capacitor. The filtering circuit is operable to receive a negative data signal and produce a filtered data signal. The filtering circuit may be tuned to produce a zero at a pole frequency in the filtered data signal that compensates for signal degradation caused by the optical transmitter. The current-mode driver also includes an analog current source coupled in parallel to the digital current source, wherein the analog current source is operable to generate a subtraction current signal proportional to the filtered data signal. The subtraction current signal combined with the main current signal are operable to drive the transmitter. |
申请公布号 |
US2016248518(A1) |
申请公布日期 |
2016.08.25 |
申请号 |
US201514631272 |
申请日期 |
2015.02.25 |
申请人 |
Fujitsu Limited |
发明人 |
Parikh Samir |
分类号 |
H04B10/564;H04L25/03;H04B10/50 |
主分类号 |
H04B10/564 |
代理机构 |
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代理人 |
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主权项 |
1. A current-mode driver with built-in continuous-time linear equalization (CTLE) for a transmitter, comprising:
a digital current source operable to use a data signal to produce a main current signal; a filtering circuit comprising a resistor and a capacitor, the filtering circuit operable to receive a negative data signal and produce a filtered data signal, wherein the filtering circuit is tuned to produce a zero at a pole frequency in the filtered data signal that compensates for signal degradation caused by an optical transmitter; and an analog current source coupled in parallel to the digital current source, wherein the analog current source is operable to generate a subtraction current signal proportional to the filtered data signal, the subtraction current signal combined with the main current signal are operable to drive the transmitter. |
地址 |
Kawasaki-shi JP |