发明名称 |
Low frequency loop-back in a high speed optical transceiver |
摘要 |
The invention relates to methods and apparatus that provide a low frequency data loop-back in a transceiver to advantageously provide built-in test capability with low overhead. The low frequency loop-back advantageously allows testing of a receiver and a transmitter of the transceiver through a high frequency serial interface while reducing the need to interface to a low frequency interface of the transceiver with expensive and specialized test equipment. One embodiment of the low frequency data loop-back includes a transceiver configured to select between a reference clock signal for normal use of the transceiver and a clock signal generated from serial data for test use in response to an activation of a loop-back test command. In one embodiment, a multiplexer selects between the reference clock signal and the generated clock signal.
|
申请公布号 |
US2002097682(A1) |
申请公布日期 |
2002.07.25 |
申请号 |
US20010873924 |
申请日期 |
2001.06.04 |
申请人 |
ENAM SYED K.;DJAFARI MASOUD;TRAN DUKE T.;SMYTHE R. KEUF;CHOI MICHAEL B.;KE BO-SHIOU;LEE VI |
发明人 |
ENAM SYED K.;DJAFARI MASOUD;TRAN DUKE T.;SMYTHE R. KEUF;CHOI MICHAEL B.;KE BO-SHIOU;LEE VI |
分类号 |
H03D7/14;H03H11/52;H03K19/018;H03L7/085;H03L7/087;H03L7/089;H03L7/091;H03L7/099;H03L7/10;H03L7/14;H03L7/18;H04J3/06;H04L1/24;H04L7/00;H04L7/033;H04L25/02;H04L25/05;(IPC1-7):H04L12/26 |
主分类号 |
H03D7/14 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|