公开(公告)号：US20190013819A1

公开(公告)日：2019-01-10

申请号：US16020678

申请日：2018-06-27

Applicant: STMicroelectronics S.r.I.

Inventor： Luigino D'Alessio ,  Germano Nicollini

IPC: H03M1/46

CPC classification number: H03M1/466 ,  H03F1/3211 ,  H03F3/005 ,  H03F3/45475 ,  H03F2200/156 ,  H03F2200/159 ,  H03F2200/264 ,  H03F2203/45134 ,  H03F2203/45136 ,  H03F2203/45171 ,  H03F2203/45514 ,  H03F2203/45534 ,  H03F2203/45546 ,  H03F2203/45551 ,  H03M1/804

Abstract: In some embodiments, a circuit for use in devices involving digital-to-analog conversion of signals includes: a capacitive digital-to-analog converter array and an amplifier. The capacitive digital-to-analog converter includes an input port for receiving a digital input signal and an output port. The amplifier includes capacitive feedback loops that include a first capacitor coupling the output of the amplifier with the input of the amplifier and a second capacitor coupled to the output port of the digital-to-analog converter array at the input of the amplifier. The circuit further includes a set of switches that include a first switch and a second switch coupled with opposed ends of the second capacitor at the input and at the output of the amplifier, respectively.

公开(公告)号：US20210004031A1

公开(公告)日：2021-01-07

申请号：US16459169

申请日：2019-07-01

Applicant: STMicroelectronics S.r.I.

Inventor： Marco Orazio Cavallaro ,  Germano Nicollini ,  Giuseppe Palmisano

IPC: G05F1/46 ,  G05F1/575 ,  G05F1/59

Abstract: A voltage reference circuit includes a first circuit block configured to generate a proportional to absolute temperature current, the first circuit block comprising a current mirror amplifier, a second circuit block coupled to the first circuit block and configured to generated a complimentary to absolute temperature current, and a third circuit block coupled to both the first circuit block and the second circuit block. The second circuit block includes a multi-stage common-source amplifier. The third circuit block is configured to combine the proportional to absolute temperature current and the complimentary to absolute temperature current to generate a reference voltage at an output of the voltage reference circuit.