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https://www.analog.com/jp/resources/design-notes/ds3112-lrclkx-low-speed-clock-recovery-operation.html DS3112 LRCLKx Low Speed Clock Recovery Operation | Analog Devices How the DS3112 DS3/E3 multiplexer recovers the 28 DS1 clocks in M13 and C-bit parity modes, recovers the 16 E1 clocks in E13 low speedclockrecoveryoperationanalog