Abstract
In this paper the system level design of a
continuous-time ∆Σ modulator for portable ultrasound scanners
is presented. The overall required signal-to-noise ratio (SNR)
is derived to be 42 dB and the sampling frequency used is
320 MHz for an oversampling ratio of 16. In order to match
these requirements, a fourth order, 1-bit modulator with optimal
zero placing is used. An analysis shows that the thermal noise
from the resistors and operational transconductance amplifier
is not a limiting factor due to the low required SNR, leading
to an inherently very low-power implementation. Furthermore,
based on high-level VerilogA simulations, the performance of the
∆Σ modulator versus various block performance parameters is
presented as trade-off curves. Based on these results, the block
specifications are derived.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of NORCAS 2015 |
| Number of pages | 4 |
| Publisher | IEEE |
| Publication date | 2015 |
| ISBN (Print) | 978-1-4673-6576-5 |
| DOIs | |
| Publication status | Published - 2015 |
| Event | 2015 IEEE Nordic Circuits and Systems Conference - Oslo, Norway Duration: 26 Oct 2015 → 28 Oct 2015 Conference number: 1 https://ieeexplore.ieee.org/xpl/conhome/7360269/proceeding |
Conference
| Conference | 2015 IEEE Nordic Circuits and Systems Conference |
|---|---|
| Number | 1 |
| Country/Territory | Norway |
| City | Oslo |
| Period | 26/10/2015 → 28/10/2015 |
| Other | A merge of NORCHIP and the International Symposium on System-on-Chip (SoC) |
| Internet address |