Figure 4From: A reconfigurable arbitrary waveform generator using PWM modulation for ultrasound researchSimulated waveforms used for generating the high-speed digital PWM excitation signals, considering a sampling rate of 160 MHz to transmit a 20 MHz center frequency waveform. (a) In phase – i(n) and quadrature – q(n) waveforms. (b) Digital PWM signals IA, IB, QA and QB.Back to article page