US 12,225,104 B2
Dynamically weighted exclusive or gate having weighted output segments for phase detection and phase interpolation
Armin Tajalli, Lausanne (CH)
Filed by Kandou Labs, S.A., Lausanne (CH)
Filed on Jun. 13, 2023, as Appl. No. 18/334,140.
Application 18/334,140 is a continuation of application No. 17/840,006, filed on Jun. 14, 2022, granted, now 11,677,539.
Application 17/840,006 is a continuation of application No. 16/781,910, filed on Feb. 4, 2020, granted, now 11,362,800, issued on Jun. 14, 2022.
Application 16/781,910 is a continuation of application No. 15/881,509, filed on Jan. 26, 2018, granted, now 10,554,380, issued on Feb. 4, 2020.
Prior Publication US 2023/0327846 A1, Oct. 12, 2023
Int. Cl. H04L 7/033 (2006.01); H03K 19/21 (2006.01); H03L 7/08 (2006.01); H03L 7/085 (2006.01); H03L 7/099 (2006.01); H04L 7/00 (2006.01)
CPC H04L 7/0331 (2013.01) [H03K 19/215 (2013.01); H03L 7/0807 (2013.01); H03L 7/085 (2013.01); H03L 7/099 (2013.01); H04L 7/0087 (2013.01); H04L 7/033 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a phase interpolation control signal generator configured to generate a multi-bit control signal;
four weighted AND gates, each weighted AND gate configured to receive a respective pairwise combination of (i) a reference signal or its complement and (ii) a local oscillator signal or its complement, each weighted AND gate having a control input configured to receive a portion of the multi-bit control signal to control an amount of source current or sink current to an output node; and
a low pass filter connected to the output node configured to generate a local oscillator control signal by filtering the sourced and sunk currents on the output node.