Current-mode ultrasound beamformer with multiple-input–sequential-output memory structure

A current-mode ultrasound beamformer (BF) is proposed. Each channel of BF converts the echo voltage signal into current and performs uniform sampling. The sampled current of each channel is injected into one of the memory capacitors depending on a delay profile at time instance when the echo signal is sampled. Since multiple currents can be simultaneously added in parallel, multiple signal current...