Fig. 4: ADC concept and measurements. | npj Flexible Electronics

Fig. 4: ADC concept and measurements.

From: An ultrasound imaging system exploiting transducers and multiplexers on a flexible substrate together with a log-delta CMOS ADC

Fig. 4

a, b Conventional (a) and proposed (b) approach for processing ultrasound signals. c, d Structural Similarity (SSIM) comparison for different quantization strategies: conventional linearly spaced quantization levels (c) and logarithmically spaced levels (d). e Exponential input signal used to validate the ADC functionality. f, g Transient response of the ADC: magnitude (f) and phase (g). h–j B-mode images obtained using conventional processing of the original RF data (h), employing the measured output from the proposed ADC (i), and the difference between the two images (j).

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