From: Comparison of synthetic aperture architectures for miniaturised ultrasound imaging front-ends
Paper | Technology | Channels | Beamformer architecture | Center freq (MHz) | Delay resolution (ns) | Frame rate | Power/channel (mW) |
---|---|---|---|---|---|---|---|
This work | Spartan-6â„¢ FPGA | 64 (1 Rx channel) | Quadrature, single channel, digital SAB | \(2.5\) | \(100\)Â | \(7\)Â Â Hz | \(4.1\)Â |
 [20] | \(0.18\) μm CMOS | \(32\times 32\) | Analogue, sample-and-hold sub-array beamformer | \(5\) | \(30\) | \(44.4\) vol/s | \(0.27\) |
 [9] | \(0.13\) μm NAND | 32 | Parallel digital delay-and-sum | \(3.5\) | \(17.8\) | \(30\) Hz | \(9.5\) |
 [6] | \(0.13\) μm CMOS | 32 | Analogue, sample-and-hold sub-array beamformer | \(1.25\) | 1.75–\(2.5\) | – | \(8.9\) |
\(0.35\) μm CMOS | 8 | Parallel delay-and-sum using analogue delay cells | 30–50 | 1.75–\(2.5\) | – | \(8.4\) | |
 [22] | Spartan-3 FPGA | 32 (16 Rx channels) | Pseudo-dynamic, extended aperture, digital beamformer | \(3.5\) | – | \(30\) Hz | – |