US 11,942,961 B2
Electronic circuit having a digital to analog converter
Daniele Oreggia, Milan (IT); and Marco Cignoli, Pavia (IT)
Assigned to STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed by STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed on Apr. 4, 2022, as Appl. No. 17/713,033.
Claims priority of application No. 102021000009269 (IT), filed on Apr. 13, 2021.
Prior Publication US 2022/0329252 A1, Oct. 13, 2022
Int. Cl. H03M 1/10 (2006.01); H03M 1/56 (2006.01); H03M 1/66 (2006.01); H03M 1/68 (2006.01)
CPC H03M 1/1071 (2013.01) [H03M 1/56 (2013.01); H03M 1/662 (2013.01); H03M 1/687 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electronic circuit, comprising:
a first channel including a first digital to analog converter having an output coupled to a first input of a first sign comparator, the first channel configured to receive a first analog signal;
a second channel including a second digital to analog converter, the second channel configured to receive a second analog signal;
a switch network configured to selectively couple, upon reception of a self-test mode signal signaling a test phase, an output of the second digital to analog converter to a second input of the first sign comparator, the first input of the first sign comparator being maintained coupled to the output of the first digital to analog converter;
a ramp generation circuit configured to supply to the first digital to analog converter and the second digital to analog converter two identical ramps of digital codes, which are shifted by a programmable offset with respect to one another; and
a checking circuit coupled to an output of the first sign comparator, the checking circuit configured to issue a test status signal based on the output of the first sign comparator.