US 11,943,548 B2
Circuit for the multiplexing and read-out of variable-resistance sensor arrays
Anton Guimerà Brunet, Cerdanyola del Valles (ES); Lluis Antoni Terés Terés, Cerdanyola del Valles (ES); Michele Dei, Cerdanyola del Valles (ES); Jose Agustín Cisneros Fernández, Cerdanyola del Valles (ES); Francisco Serra Graells, Bellaterra (ES); and José Antonio Garrido Ariza, Sant Just Desvern (ES)
Assigned to CONSEJO SUPERIOR DE INVESTIGACIONES CIENTÍFICAS (CSIC), Madrid (ES); UNIVERSITAT AUTÒNOMA DE BARCELONA, Bellaterra (ES); FUNDACIÓ INSTITUT CATALÀ DE NANOCIÈNCIA I NANOTECNOLOGIA (ICN2), Bellaterra (ES); and INSTITUCIÓ CATALANA DE RECERCA I ESTUDIS AVANÇATS, Barcelona (ES)
Appl. No. 17/264,426
Filed by CONSEJO SUPERIOR DE INVESTIGACIONES CIENTÍFICAS (CSIC), Madrid (ES); UNIVERSITAT AUTÒNOMA DE BARCELONA, Bellaterra (ES); FUNDACIÓ INSTITUT CATALÀ DE NANOCIÈNCIA I NANOTECNOLOGIA (ICN2), Bellaterra (ES); and INSTITUCIÓ CATALANA DE RECERCA I ESTUDIS AVANÇATS, Barcelona (ES)
PCT Filed Aug. 2, 2019, PCT No. PCT/EP2019/070868
§ 371(c)(1), (2) Date Jan. 29, 2021,
PCT Pub. No. WO2020/025786, PCT Pub. Date Feb. 6, 2020.
Claims priority of application No. 18382593 (EP), filed on Aug. 3, 2018.
Prior Publication US 2021/0321053 A1, Oct. 14, 2021
Int. Cl. H04N 25/40 (2023.01); H03D 3/00 (2006.01); H04N 25/74 (2023.01); H04N 25/75 (2023.01); H04N 25/76 (2023.01)
CPC H04N 25/40 (2023.01) [H03D 3/007 (2013.01); H04N 25/74 (2023.01); H04N 25/75 (2023.01); H04N 25/76 (2023.01); A61B 2562/046 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for multiplexing and demultiplexing sensor element signals in a two dimensional sensor array without using switching elements, the method comprising:
for each column of sensor elements in the array, feeding a continuous voltage harmonic carrier waveform to all the sensor elements of the respective column of the sensor array, where a different continuous voltage harmonic carrier waveform is fed to each column;
for each sensor element, feeding a signal to the respective sensor element, where a different signal is fed to each sensor element;
for each row of sensor elements in the array, reading a summed output current from all sensor elements in the same row, where the summed output current comprises continuous current harmonic waveforms multiplexed with the signals fed to the sensor elements of the same row; and
for each row of sensor elements in the array, recovering by lock-in demodulation the signals fed to each sensor element in the same row from the summed output current from all sensor elements in the same row.