Title :
A 1.8 V, 0.3 mW, 10-bit SA-ADC with new self-timed timing control for biomedical applications
Author :
Chow, Hwang-Cherng ; Chen, Bo-Wei ; Chen, Hsiao-Chen ; Feng, Wu-Shiung
Author_Institution :
Graduate Inst. of Electron. Eng., Chang Gung Univ., Tao-Yuan, Taiwan
Abstract :
A new self-timed timing control and WRV (without reference voltage) algorithm based on the conventional SA-ADC architecture to detect biomedical signals is proposed in this paper. Using the new self-timed control method, the conversion time could be shortened to turn off the analog circuit earlier to lower the power consumption. In addition, a new WRV algorithm is introduced to remove the circuits of reference voltage sources in the DAC sub-circuit inside the SA-ADC. By this way, both INL and DNL errors of this SA-ADC are well controlled in 0.33LSB from simulation results. Also, the input range of this proposed SA-ADC can be extended to rail-to-rail.
Keywords :
analogue-digital conversion; biomedical electronics; biomedical engineering; biomedical equipment; circuit simulation; digital-analogue conversion; error analysis; integrated circuit modelling; medical signal detection; timing; 0.3 mW; 1.8 V; 10 bit; DAC sub-circuit; DNL errors; INL errors; SA-ADC; WRV algorithm; analog circuit turn off; biomedical applications; biomedical signals detection; conversion time; differential nonlinearity errors; extended rail-to-rail input range; integral nonlinearity errors; power consumption; reference voltage source circuits; self-timed timing control; simulation; successive approximation ADC; without reference voltage algorithm; Circuits; Energy consumption; Error correction; Frequency; Heart beat; Signal detection; Signal processing; Signal resolution; Timing; Voltage control;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1464693
