US 11,855,660 B2
Sigma-delta analog-to-digital converter and sensor arrangements including the same
Alberto Maccioni, La Spezia (IT); Monica Schipani, Pisa (IT); Massimiliano Franzolin, Pontedera (IT); and Fabrizio Mannozzi, Vezzano Ligure (IT)
Assigned to Sciosense B.V., AE Eindhoven (NL)
Appl. No. 17/294,903
Filed by Sciosense B.V., AE Eindhoven (NL)
PCT Filed Nov. 26, 2019, PCT No. PCT/EP2019/082611
§ 371(c)(1), (2) Date May 18, 2021,
PCT Pub. No. WO2020/109320, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 18208673 (EP), filed on Nov. 27, 2018.
Prior Publication US 2021/0409036 A1, Dec. 30, 2021
Int. Cl. H03M 3/00 (2006.01); G01K 7/34 (2006.01)
CPC H03M 3/474 (2013.01) [G01K 7/34 (2013.01); H03M 3/49 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A sigma-delta analog-to-digital converter comprising:
a first injection branch and a second injection branch;
a first feedback branch and a second feedback branch;
an integration node connected to the first and second injection branches and the first and second feedback branches;
an integrator connected to the integration node; and
a comparator connected downstream of the integrator and configured to generate a comparator output signal to control the first and second feedback branches,
wherein the first and second injection branches are configured to provide a charge injection dependent on a respective input quantity to the integration node,
wherein an input quantity of the first injection branch is selected from a differential voltage signal, a capacitance dependent signal and a current dependent signal,
wherein an input quantity of the second injection branch is selected from another one of the differential voltage signal, the capacitance dependent signal and the current dependent signal, and
wherein the first and second feedback branches are configured to provide a feedback charge injection dependent on the comparator output signal to the integration node, the first and second feedback branches configured to receive one of a fixed voltage or the differential voltage signal.