An area-efficient CMOS 1-MS/s 10-bit charge-redistribution SAR ADC for battery voltage measure- ment in a SoC chip is proposed. A new DAC architecture presents the benefits of a low power approach without applying the...An area-efficient CMOS 1-MS/s 10-bit charge-redistribution SAR ADC for battery voltage measure- ment in a SoC chip is proposed. A new DAC architecture presents the benefits of a low power approach without applying the common mode voltage. The threshold inverter quantizer （TIQ）-based CMOS Inverter is used as a comparator in the ADC to avoid static power consumption which is attractive in battery-supply application. Sixteen level-up shifters aim at converting the ultra low core voltage control signals to the higher voltage level analog circuit in a 55 nm CMOS process. The whole ADC power consumption is 2.5 mW with a maximum input capaci- tance of 12 pF in the sampling mode. The active area of the proposed ADC is 0.0462 mm2 and it achieves the SFDR and ENOB of 65.6917 dB and 9.8726 bits respectively with an input frequency of 200 kHz at 1 MS/s sampling rate.展开更多
A switched capacitor bandgap voltage reference with correlated double sampling structure embedded in a temperature sensor is implemented in a standard 0.35 um CMOS process. Due to the smaller change of the op-amp＇s o...A switched capacitor bandgap voltage reference with correlated double sampling structure embedded in a temperature sensor is implemented in a standard 0.35 um CMOS process. Due to the smaller change of the op-amp＇s output voltage, this topology is very suitable for low power applications. In addition, errors caused by the finite op-amp gain, input offset voltage, and 1/f noise are eliminated with the correlated double sampling technique. Additionally, two-level process calibration techniques are designed to minimize the process spread. Finally, a method of getting a full period valid reference voltage output is discussed and experimental results are provided to verify the effectiveness of the proposed structure.展开更多
基金supported by the National Natural Science Foundation of China(No.60736030)the Research Program of Science and Technology Commission of Shanghai(No.11110707100)the National 02 Key Special Program of China(No.2009ZX02305-005)
文摘An area-efficient CMOS 1-MS/s 10-bit charge-redistribution SAR ADC for battery voltage measure- ment in a SoC chip is proposed. A new DAC architecture presents the benefits of a low power approach without applying the common mode voltage. The threshold inverter quantizer （TIQ）-based CMOS Inverter is used as a comparator in the ADC to avoid static power consumption which is attractive in battery-supply application. Sixteen level-up shifters aim at converting the ultra low core voltage control signals to the higher voltage level analog circuit in a 55 nm CMOS process. The whole ADC power consumption is 2.5 mW with a maximum input capaci- tance of 12 pF in the sampling mode. The active area of the proposed ADC is 0.0462 mm2 and it achieves the SFDR and ENOB of 65.6917 dB and 9.8726 bits respectively with an input frequency of 200 kHz at 1 MS/s sampling rate.
基金Project supported by the National Science and Technology Major Projects of China(No.2012ZX02503-005)the Research Program of Science and Technology Commission of Shanghai(No.11511500903)
文摘A switched capacitor bandgap voltage reference with correlated double sampling structure embedded in a temperature sensor is implemented in a standard 0.35 um CMOS process. Due to the smaller change of the op-amp＇s output voltage, this topology is very suitable for low power applications. In addition, errors caused by the finite op-amp gain, input offset voltage, and 1/f noise are eliminated with the correlated double sampling technique. Additionally, two-level process calibration techniques are designed to minimize the process spread. Finally, a method of getting a full period valid reference voltage output is discussed and experimental results are provided to verify the effectiveness of the proposed structure.
