Fig. 1.
(a) Full wave NMOS rectifier. (b) Full wave cross-couple PMOS rectifier. (c) Full-wave CMOS bootstrapped rectifier.
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| Citation: |
Dongfang Pan, Feng Zhang, Lu Huang, Jinliang Li. A common-gate bootstrapped CMOS rectifier for VHF isolated DC-DC converter[J]. Journal of Semiconductors, 2017, 38(5): 055002. doi: 10.1088/1674-4926/38/5/055002
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D F Pan, F Zhang, L Huang, J L Li. A common-gate bootstrapped CMOS rectifier for VHF isolated DC-DC converter[J]. J. Semicond., 2017, 38(5): 055002. doi: 10.1088/1674-4926/38/5/055002.
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A common-gate bootstrapped CMOS rectifier for VHF isolated DC-DC converter
DOI: 10.1088/1674-4926/38/5/055002
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Abstract
A common-gate bootstrapped CMOS rectifier dedicated for VHF (very high frequency) isolated DC-DC converter is proposed.It uses common-gate bootstrapped technique to compensate the power loss due to the threshold voltage, and to solve the reflux problem in the conventional rectifier circuit.As a result, it improves the power conversion efficiency (PCE) and voltage conversion ratio (VCR).The design saves almost 90% of the area compared to a previously reported double capacitor structure.In addition, we compare the previous rectifier with the proposed common-gate bootstrapped rectifier in the case of the same area; simulation results show that the PCE and VCR of the proposed structure are superior to other structures.The proposed common-gate bootstrapped rectifier was fabricated by using CSMC 0.5 μm BCD process.The measured maximum PCE is 86% and VCR achieves 77% at the operating frequency of 20 MHz.The average PCE is about 79% and average VCR achieves 71% in the frequency range of 30-70 MHz.Measured PCE and VCR have been improved compared to previous results. -
References
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