US 12,003,612 B2
Transmitting clock reference over reverse channel in a bidirectional serial link
Jerzy A. Teterwak, Colorado Springs, CO (US)
Assigned to Maxim Integrated Products, Inc., San Jose, CA (US)
Filed by Maxim Integrated Products, Inc., San Jose, CA (US)
Filed on Aug. 18, 2022, as Appl. No. 17/890,817.
Claims priority of provisional application 63/242,887, filed on Sep. 10, 2021.
Prior Publication US 2023/0081578 A1, Mar. 16, 2023
Int. Cl. H04L 7/033 (2006.01); H03L 7/08 (2006.01); H03L 7/087 (2006.01); H04L 7/00 (2006.01)
CPC H04L 7/033 (2013.01) [H03L 7/0807 (2013.01); H03L 7/087 (2013.01); H04L 7/0004 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A clock recovery circuit for a serializer/deserializer comprising:
a clock detector configured to receive a serial data stream from a remote device over a reverse channel, wherein the serial data stream includes clock reference data, and the clock detector configured to output a clock detect signal in response to detecting the clock reference data in the serial data stream;
a phase lock loop including a detector configured to receive the serial data stream and to operate as a phase/frequency detector, or a phase detector; and
a controller configured to receive the clock detect signal and to selectively enable the detector based on the clock detect signal.