US 12,334,926 B2
Duty cycle distortion (DCD) sampling in a low-swing transmitter
Igal Kushnir, Hod Hasharon (IL); Naor Peretz, Kiryat Ata (IL); and Roi Levi, Bruchin (IL)
Assigned to Mellanox Technologies, Ltd., Yokneam (IL)
Filed by Mellanox Technologies, Ltd., Yokneam (IL)
Filed on Dec. 28, 2023, as Appl. No. 18/398,779.
Application 18/398,779 is a continuation of application No. 17/884,878, filed on Aug. 10, 2022, granted, now 11,894,847.
Prior Publication US 2024/0128954 A1, Apr. 18, 2024
Int. Cl. H03K 3/017 (2006.01); H03K 19/0185 (2006.01); H03K 19/17784 (2020.01); H04L 25/03 (2006.01)
CPC H03K 3/017 (2013.01) [H03K 19/018521 (2013.01); H03K 19/17784 (2013.01); H04L 25/03878 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A transmitter comprising:
a first output driver comprising a first complementary metal-oxide semiconductor (CMOS) amplifier and a first attenuator coupled to an output of the first CMOS amplifier, the first CMOS amplifier to receive an input signal and output an intermediate signal to the first attenuator, and the first attenuator to receive the intermediate signal and output an output signal having a signal swing that is less than a signal swing of the input signal, wherein the first attenuator is a passive continuous-time linear equalization (CTLE) circuit; and
a first duty cycle correction (DCC) loop coupled to the first output driver, wherein the first DCC loop is to estimate first duty cycle distortion (DCD) in the intermediate signal output by the first CMOS amplifier.