US 12,355,467 B2
Complementary current-steering digital-to-analog converter
Chih-Hou Tsai, Hsinchu (TW); Chien-Yuan Cheng, Hsinchu (TW); Ting-Yu Ko, Hsinchu (TW); and Shu-Lin Chang, Hsinchu (TW)
Assigned to MEDIATEK INC., Hsinchu (TW)
Filed by MEDIATEK INC., Hsinchu (TW)
Filed on May 29, 2023, as Appl. No. 18/325,035.
Claims priority of provisional application 63/370,398, filed on Aug. 4, 2022.
Prior Publication US 2024/0048149 A1, Feb. 8, 2024
Int. Cl. H03M 1/74 (2006.01)
CPC H03M 1/74 (2013.01) 16 Claims
OG exemplary drawing
 
1. A complementary current-steering digital-to-analog converter, comprising:
a transimpedance amplifier;
a p-type digital-to-analog converter, comprising a plurality of p-type current sources, wherein the p-type current sources are coupled to a first input terminal or a second input terminal of the transimpedance amplifier according to a digital input of the complementary current-steering digital-to-analog converter; and
an n-type digital-to-analog converter, comprising a plurality of n-type current sources, wherein the n-type current sources are coupled to the first input terminal or the second input terminal of the transimpedance amplifier according to the digital input of the complementary current-steering digital-to-analog converter;
wherein:
in response to the digital input changing from a first value to a second value that is greater than the first value, one or more n-type current sources connected to the second input terminal of the transimpedance amplifier are switched so that they are connected to the first input terminal of the transimpedance amplifier.