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Figure 7 | BioMedical Engineering OnLine

Figure 7

From: A reconfigurable arbitrary waveform generator using PWM modulation for ultrasound research

Figure 7

High voltage 20 MHz pulses with the Gaussian profile measured on RC loads. (a) A 1.5 cycle broad bandwidth pulse with 100 Vpp produced with −6 dB bandwidth (20.78 MHz) and (b) its spectrum with a relative bandwidth of 103.9%. (c) A medium bandwidth pulse and (d) its spectrum with a relative bandwidth of 54.2%. (e) A narrow bandwidth pattern and (f) its spectrum with a relative bandwidth of 23.1%. (g) A multicycle waveform for Doppler imaging and (h) its spectrum with a relative bandwidth of 3.6%.

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