US 11,870,473 B1
Digital-to-analog converter with hybrid coupler
Filipe Tabarani, Hohenlinden (DE); and Timo W Gossmann, Neubiberg (DE)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jul. 22, 2022, as Appl. No. 17/871,677.
Int. Cl. H03M 1/74 (2006.01); H04B 1/04 (2006.01)
CPC H04B 1/04 (2013.01) [H03M 1/74 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A digital-to-analog converter (DAC) comprising:
a clock signal line;
an in-phase digital code line;
a quadrature digital code line;
a plurality of cells arranged in a plurality of columns and a plurality of lines;
a first column decoder coupled to a first portion of the plurality of cells, the clock signal line, and the in-phase digital code line;
a first matching circuit coupled to the first portion of the plurality of cells;
a second column decoder coupled to a second portion of the plurality of cells, the clock signal line, and the quadrature digital code line;
a second matching circuit coupled to the second portion of the plurality of cells; and
a hybrid coupler coupled to the first matching circuit and the second matching circuit.