US 12,176,925 B2
Sigma-delta analogue-to-digital converter with gmC-VDAC
Friedel Gerfers, Berlin (DE); and Marcel Runge, Berlin (DE)
Assigned to TECHNISCHE UNIVERSITAT BERLIN, Berlin (DE)
Appl. No. 17/755,229
Filed by TECHNISCHE UNIVERSITAT BERLIN, Berlin (DE)
PCT Filed Oct. 23, 2020, PCT No. PCT/EP2020/079938
§ 371(c)(1), (2) Date Apr. 25, 2022,
PCT Pub. No. WO2021/078960, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. 102019128876.2 (DE), filed on Oct. 25, 2019.
Prior Publication US 2022/0407539 A1, Dec. 22, 2022
Int. Cl. H03M 3/00 (2006.01)
CPC H03M 3/422 (2013.01) [H03M 3/494 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A sigma-delta analogue-to-digital converter comprising:
a transconductance stage comprising a first terminal, a second terminal, a third terminal and a capacitor connected in parallel at the third terminal; and
a quantiser at the third terminal of the transconductance stage with a feedback by a voltage digital-to-analogue converter for feeding back a feedback signal to one of the terminals of the transconductance stage;
wherein the first terminal is configured as a non-inverting input and the second terminal is configured as an inverting input, and wherein the non-inverting input is configured to receive an analogue input voltage signal and the inverting input is connected to the digital-to-analogue converter;
wherein the transconductance stage is configured as a single-ended transconductance stage with a first switching element and a second switching element; and
wherein the first switching element and the second switching element are connected to a power source by a terminal via a voltage node and to the third terminal of the transconductance stage by a further terminal in each case via a summing element, and the first switching element is switched via the input voltage signal and the second switching element is switched via the feedback signal at a respective control terminal.