Low Power Low Noise System-on-Chip Designfor ECG Monitoring and Diagnostic
Team 5:
Yang Xu
Yanling Wu
Xiaotong Jia
Outline Reference Circuit
Beta Multiplier Reference
Low Drop-Out Regulator
Instrumentation Amplifier (IA)
Transconductance Stage
Transimpedance Stage
Bandpass filter
Amplifier Stage
Common Source Amplifier
Buffer
SAR ADC
DAC (S&H)
Comparator
Successive Approximation Register
Reference Circuit (1/2) - Beta Multiplier ReferenceVbiasn 1 V
Vbiasp 2.081 V
Bias current 1.925 uA
Supply voltage sensitivity
250 ppm/V
Temperature sensitivity
692 ppm/
Voltage range 1.2-4.7 V
Start-up delay 36.3 us
Power 22 uw
Sensitivity:250 ppm/v
Reference Circuit (1/2)
Start-up Delay= 36.3 uS
Sensitivity:T/(Iref)*(dIref/dT)=692 ppm/
Reference Circuit (2/2) - Low Drop-Out Regulator
Supply voltage 3.7V
Output voltage 3.3V
Drop-out voltage 0.4V
Minimum load 677.6Ω
Maximum current 4.71mA
Static Power 22.91uW
Frequency Response
Gain = 62.9dB, f1 = 0.495 Hz, f2 = 154 Hz
Total Input Referred Noise:33.794 nV/sqrt(Hz)*sqrt(150-0.5)=0.41u Vrms
33.794 nV/sqrt(Hz)
Summary
Total power consumption is 334.1 uW
Analog Front End Gain is 62.9 dB, total input referred noise is 0.41 uV
SAR ADC ENOB is 7.5 bits
Reference[1] https://www.digikey.com/product-detail/en/illinois-capacitor/RJD3555HPPV30M/1572-1627-ND/6159145
[2] https://datasheets.maximintegrated.com/en/ds/DS1099.pdf
[3] https://www.biopac.com/product/bionomadix-2ch-ecg-amplifier/
[4]https://www.researchgate.net/profile/Tapas_Mondal/publication/220144425_A_Wireless_Wearable_ECG_Se
nsor_for_Long-Term_Applications/links/00b4953b44a3b3afe0000000.pdf
[5] D. S. Kumar et al., "A high CMRR analog front-end IC for wearable physiological monitoring," 2012 Annual
IEEE India Conference (INDICON), Kochi, 2012, pp. 385-388.
[6] Chia-Hao Hsu, Chi-Chun Huang, Kian Siong, Wei-Chih Hsiao and Chua-Chin Wang, "A high performance
current-balancing instrumentation amplifier for ECG monitoring systems," 2009 International SoC Design
Conference (ISOCC), Busan, 2009, pp. 83-86.