发明名称 |
ADAPTIVE SAMPLING QUALIFICATION FOR EXTINCTION RATIO CONTROL |
摘要 |
Techniques are described for adaptive sampling qualification for extinction ration control. The techniques may be implemented in a laser driver assembly which includes a laser driver and a sampling loop configured to facilitate sampling of photodiode current produced by a monitor photodiode (MPD) of an optical transmitter assembly. The sampling loop comprises a low pass filter with reset, a digital-to-analog converter (DAC), and a comparator. The filter receives transmit (Tx) data provided to the laser driver and generates an output corresponding to a number of consecutive bits of a first type received in the transmit (Tx) data. The filter resets the output when a bit of a second type is received. The digital-to-analog converter (DAC) outputs a threshold signal. The comparator compares the output from the low pass filter and the threshold signal, and outputs a signal indicating when the photodiode current is to be sampled. |
申请公布号 |
US2014270806(A1) |
申请公布日期 |
2014.09.18 |
申请号 |
US201313930802 |
申请日期 |
2013.06.28 |
申请人 |
Maxim Integrated Products, Inc. |
发明人 |
Valencia Miguel;Willcocks Benjamin A.;Born Christopher J. |
分类号 |
H04B10/50 |
主分类号 |
H04B10/50 |
代理机构 |
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代理人 |
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主权项 |
1. A laser driver assembly comprising:
a laser driver; and a sampling loop configured to facilitate sampling of photodiode current produced by a monitor photodiode (MPD) of an optical transmitter assembly, the sampling loop comprising:
a low pass filter configured to receive transmit (Tx) data provided to the laser driver and to generate an output corresponding to a number of consecutive bits of a first type received in the transmit (Tx) data, the low pass filter configured to reset the output when a bit of a second type is received;a digital-to-analog converter (DAC) configured to output a threshold signal; anda comparator configured to compare the output from the low pass filter and the threshold signal, and to output a signal indicating when the photodiode current is to be sampled. |
地址 |
San Jose CA US |