Abstract
Background: The increasing demand of energy harvester implementation in low power electronic devices has encouraged most of the researchers to put more effort to improve the efficiency and sensitivity of RF energy harvester system. Materials and Methods: In this study, these three blocks; voltage boosting and matching network, voltage multiplier and voltage regulator have been combined to harvest RF input as low as -20 dBm at operating frequency 915 MHz. By designing a network at the beginning of the circuit which called as voltage boosting network, the low input signal is boosted to sufficient voltage that can switch on the active component of voltage multiplier such as MOSFET. This network is designed based on LC resonant circuit which is consists of inductor and capacitor. Meanwhile, voltage multiplier is designed based on Dickson's voltage multiplier concept which utilizing NMOS diode with bulk modulation technique. The purpose of this technique is to lower down the threshold voltage (Vth)of the MOSFET. By using this four stages voltage multiplier, the input AC voltage has been rectified and boosted up efficiently. This circuit is designed based on 0.13 μm CMOS technology. Results: This system managed to achieve approximately 2 V at -10 dBm input power for 1 MΩ load resistance. However, to avoid over voltage to the load, a voltage regulator based on zener diode that is applied to limit and regulate the output voltage of rectifier. The key finding of this study is the system able to produce 2.72 V for -8 dBm input power at resistance load 1 MΩ and the efficiency about 30.95% which is much better compared to previous study. Conclusion: The proposed combination blocks of LC circuit, voltage multiplier and voltage regulator is able to produce suitable voltage for helath care monitoring system applications.
| Original language | English |
|---|---|
| Pages (from-to) | 152-159 |
| Number of pages | 8 |
| Journal | Asian Journal of Scientific Research |
| Volume | 9 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2016 |
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Keywords
- Bulk modulation
- Energy harvester
- Radio frequency
- Resonant circuit
- Threshold voltage
- Voltage regulator
ASJC Scopus subject areas
- General
Cite this
An integrated CMOS voltage multiplier and shunt voltage regulator of RF energy harvester for health care monitoring system. / Zulkifli, Farah Fatin; Sampe, Jahariah; Islam, Md. Shabiul; Rhazali, Z. A.
In: Asian Journal of Scientific Research, Vol. 9, No. 4, 2016, p. 152-159.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - An integrated CMOS voltage multiplier and shunt voltage regulator of RF energy harvester for health care monitoring system
AU - Zulkifli, Farah Fatin
AU - Sampe, Jahariah
AU - Islam, Md. Shabiul
AU - Rhazali, Z. A.
PY - 2016
Y1 - 2016
N2 - Background: The increasing demand of energy harvester implementation in low power electronic devices has encouraged most of the researchers to put more effort to improve the efficiency and sensitivity of RF energy harvester system. Materials and Methods: In this study, these three blocks; voltage boosting and matching network, voltage multiplier and voltage regulator have been combined to harvest RF input as low as -20 dBm at operating frequency 915 MHz. By designing a network at the beginning of the circuit which called as voltage boosting network, the low input signal is boosted to sufficient voltage that can switch on the active component of voltage multiplier such as MOSFET. This network is designed based on LC resonant circuit which is consists of inductor and capacitor. Meanwhile, voltage multiplier is designed based on Dickson's voltage multiplier concept which utilizing NMOS diode with bulk modulation technique. The purpose of this technique is to lower down the threshold voltage (Vth)of the MOSFET. By using this four stages voltage multiplier, the input AC voltage has been rectified and boosted up efficiently. This circuit is designed based on 0.13 μm CMOS technology. Results: This system managed to achieve approximately 2 V at -10 dBm input power for 1 MΩ load resistance. However, to avoid over voltage to the load, a voltage regulator based on zener diode that is applied to limit and regulate the output voltage of rectifier. The key finding of this study is the system able to produce 2.72 V for -8 dBm input power at resistance load 1 MΩ and the efficiency about 30.95% which is much better compared to previous study. Conclusion: The proposed combination blocks of LC circuit, voltage multiplier and voltage regulator is able to produce suitable voltage for helath care monitoring system applications.
AB - Background: The increasing demand of energy harvester implementation in low power electronic devices has encouraged most of the researchers to put more effort to improve the efficiency and sensitivity of RF energy harvester system. Materials and Methods: In this study, these three blocks; voltage boosting and matching network, voltage multiplier and voltage regulator have been combined to harvest RF input as low as -20 dBm at operating frequency 915 MHz. By designing a network at the beginning of the circuit which called as voltage boosting network, the low input signal is boosted to sufficient voltage that can switch on the active component of voltage multiplier such as MOSFET. This network is designed based on LC resonant circuit which is consists of inductor and capacitor. Meanwhile, voltage multiplier is designed based on Dickson's voltage multiplier concept which utilizing NMOS diode with bulk modulation technique. The purpose of this technique is to lower down the threshold voltage (Vth)of the MOSFET. By using this four stages voltage multiplier, the input AC voltage has been rectified and boosted up efficiently. This circuit is designed based on 0.13 μm CMOS technology. Results: This system managed to achieve approximately 2 V at -10 dBm input power for 1 MΩ load resistance. However, to avoid over voltage to the load, a voltage regulator based on zener diode that is applied to limit and regulate the output voltage of rectifier. The key finding of this study is the system able to produce 2.72 V for -8 dBm input power at resistance load 1 MΩ and the efficiency about 30.95% which is much better compared to previous study. Conclusion: The proposed combination blocks of LC circuit, voltage multiplier and voltage regulator is able to produce suitable voltage for helath care monitoring system applications.
KW - Bulk modulation
KW - Energy harvester
KW - Radio frequency
KW - Resonant circuit
KW - Threshold voltage
KW - Voltage regulator
UR - http://www.scopus.com/inward/record.url?scp=84999158328&partnerID=8YFLogxK
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U2 - 10.3923/ajsr.2016.152.159
DO - 10.3923/ajsr.2016.152.159
M3 - Article
VL - 9
SP - 152
EP - 159
JO - Asian Journal of Scientific Research
JF - Asian Journal of Scientific Research
SN - 1992-1454
IS - 4
ER -