US 11,838,058 B2
Adjusting eye heights and optical power levels of a multi-level optical signal
Daniel Draper, Portland, OR (US); and Merrick Brownlee, Hillsboro, OR (US)
Assigned to MACOM Technology Solutions Holdings, Inc., Lowell, MA (US)
Filed by MACOM Technology Solutions Holdings, Inc., Lowell, MA (US)
Filed on Mar. 28, 2023, as Appl. No. 18/127,586.
Application 18/127,586 is a continuation of application No. 17/402,169, filed on Aug. 13, 2021, granted, now 11,616,578.
Prior Publication US 2023/0239055 A1, Jul. 27, 2023
Int. Cl. H04B 10/524 (2013.01); H04B 10/079 (2013.01); H04B 10/2581 (2013.01); H04B 10/50 (2013.01)
CPC H04B 10/524 (2013.01) [H04B 10/0795 (2013.01); H04B 10/2581 (2013.01); H04B 10/50572 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A circuit comprising:
a plurality of pulse amplitude modulation drivers configured to receive different input signal pairs and corresponding ones of a plurality of drive values, and generate corresponding ones of a plurality of driven input signal pairs, wherein the plurality of drive values includes a first drive value and additional ones of the plurality of drive values that are a function of the first drive value and corresponding ones of a number of drive factors; and
a source, coupled to the plurality of pulse amplitude modulation drivers, and configure to generate an output optical signal as a function of the plurality of driven input signal pairs, wherein the optical signal output varies over time as a function of an operating temperature of the source and the plurality of drive values are configured to maintain linearity of eye height values of the output optical signal.