Patent ID: 11943548
Assignee: CONSEJO SUPERIOR DE INVESTIGACIONES CIENTÍFICAS
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  A | IPC H

Claim 0:
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.