10-GHz Fully Differential Sallen–Key Lowpass Biquad Filters in 55nm SiGe BiCMOS Technology
Multi-GHz lowpass filters are key components for many RF applications and are required for the implementation of integrated high-speed analog-to-digital and digital-to-analog converters and optical communication systems. In the last two decades, integrated filters in the Multi-GHz range have been im...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-03-01
|
| Series: | Electronics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-9292/9/4/563 |
| _version_ | 1797626489004359680 |
|---|---|
| author | Francesco Centurelli Pietro Monsurrò Giuseppe Scotti Pasquale Tommasino Alessandro Trifiletti |
| author_facet | Francesco Centurelli Pietro Monsurrò Giuseppe Scotti Pasquale Tommasino Alessandro Trifiletti |
| author_sort | Francesco Centurelli |
| collection | DOAJ |
| description | Multi-GHz lowpass filters are key components for many RF applications and are required for the implementation of integrated high-speed analog-to-digital and digital-to-analog converters and optical communication systems. In the last two decades, integrated filters in the Multi-GHz range have been implemented using III-V or SiGe technologies. In all cases in which the size of passive components is a concern, inductorless designs are preferred. Furthermore, due to the recent development of high-speed and high-resolution data converters, highly linear multi-GHz filters are required more and more. Classical open loop topologies are not able to achieve high linearity, and closed loop filters are preferred in all applications where linearity is a key requirement. In this work, we present a fully differential BiCMOS implementation of the classical Sallen Key filter, which is able to operate up to about 10 GHz by exploiting both the bipolar and MOS transistors of a commercial 55-nm BiCMOS technology. The layout of the biquad filter has been implemented, and the results of post-layout simulations are reported. The biquad stage exhibits excellent SFDR (64 dB) and dynamic range (about 50 dB) due to the closed loop operation, and good power efficiency (0.94 pW/Hz/pole) with respect to comparable active inductorless lowpass filters reported in the literature. Moreover, unlike other filters, it exploits the different active devices offered by commercial SiGe BiCMOS technologies. Parametric and Monte Carlo simulations are also included to assess the robustness of the proposed biquad filter against PVT and mismatch variations. |
| first_indexed | 2024-03-11T10:11:08Z |
| format | Article |
| id | doaj.art-b08d8b33e97a493b896916d6861bad7d |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-11T10:11:08Z |
| publishDate | 2020-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-b08d8b33e97a493b896916d6861bad7d2023-11-16T14:31:30ZengMDPI AGElectronics2079-92922020-03-019456310.3390/electronics904056310-GHz Fully Differential Sallen–Key Lowpass Biquad Filters in 55nm SiGe BiCMOS TechnologyFrancesco Centurelli0Pietro Monsurrò1Giuseppe Scotti2Pasquale Tommasino3Alessandro Trifiletti4Dipartimento di Ingegneria dell’Informazione, Elettronica e Telecomunicazioni (DIET), University of Rome “La Sapienza”, 00185 Roma, ItalyDipartimento di Ingegneria dell’Informazione, Elettronica e Telecomunicazioni (DIET), University of Rome “La Sapienza”, 00185 Roma, ItalyDipartimento di Ingegneria dell’Informazione, Elettronica e Telecomunicazioni (DIET), University of Rome “La Sapienza”, 00185 Roma, ItalyDipartimento di Ingegneria dell’Informazione, Elettronica e Telecomunicazioni (DIET), University of Rome “La Sapienza”, 00185 Roma, ItalyDipartimento di Ingegneria dell’Informazione, Elettronica e Telecomunicazioni (DIET), University of Rome “La Sapienza”, 00185 Roma, ItalyMulti-GHz lowpass filters are key components for many RF applications and are required for the implementation of integrated high-speed analog-to-digital and digital-to-analog converters and optical communication systems. In the last two decades, integrated filters in the Multi-GHz range have been implemented using III-V or SiGe technologies. In all cases in which the size of passive components is a concern, inductorless designs are preferred. Furthermore, due to the recent development of high-speed and high-resolution data converters, highly linear multi-GHz filters are required more and more. Classical open loop topologies are not able to achieve high linearity, and closed loop filters are preferred in all applications where linearity is a key requirement. In this work, we present a fully differential BiCMOS implementation of the classical Sallen Key filter, which is able to operate up to about 10 GHz by exploiting both the bipolar and MOS transistors of a commercial 55-nm BiCMOS technology. The layout of the biquad filter has been implemented, and the results of post-layout simulations are reported. The biquad stage exhibits excellent SFDR (64 dB) and dynamic range (about 50 dB) due to the closed loop operation, and good power efficiency (0.94 pW/Hz/pole) with respect to comparable active inductorless lowpass filters reported in the literature. Moreover, unlike other filters, it exploits the different active devices offered by commercial SiGe BiCMOS technologies. Parametric and Monte Carlo simulations are also included to assess the robustness of the proposed biquad filter against PVT and mismatch variations.https://www.mdpi.com/2079-9292/9/4/563active filtersanti-aliasing filtersHBTinductorlesslow-pass filtersSiGe |
| spellingShingle | Francesco Centurelli Pietro Monsurrò Giuseppe Scotti Pasquale Tommasino Alessandro Trifiletti 10-GHz Fully Differential Sallen–Key Lowpass Biquad Filters in 55nm SiGe BiCMOS Technology Electronics active filters anti-aliasing filters HBT inductorless low-pass filters SiGe |
| title | 10-GHz Fully Differential Sallen–Key Lowpass Biquad Filters in 55nm SiGe BiCMOS Technology |
| title_full | 10-GHz Fully Differential Sallen–Key Lowpass Biquad Filters in 55nm SiGe BiCMOS Technology |
| title_fullStr | 10-GHz Fully Differential Sallen–Key Lowpass Biquad Filters in 55nm SiGe BiCMOS Technology |
| title_full_unstemmed | 10-GHz Fully Differential Sallen–Key Lowpass Biquad Filters in 55nm SiGe BiCMOS Technology |
| title_short | 10-GHz Fully Differential Sallen–Key Lowpass Biquad Filters in 55nm SiGe BiCMOS Technology |
| title_sort | 10 ghz fully differential sallen key lowpass biquad filters in 55nm sige bicmos technology |
| topic | active filters anti-aliasing filters HBT inductorless low-pass filters SiGe |
| url | https://www.mdpi.com/2079-9292/9/4/563 |
| work_keys_str_mv | AT francescocenturelli 10ghzfullydifferentialsallenkeylowpassbiquadfiltersin55nmsigebicmostechnology AT pietromonsurro 10ghzfullydifferentialsallenkeylowpassbiquadfiltersin55nmsigebicmostechnology AT giuseppescotti 10ghzfullydifferentialsallenkeylowpassbiquadfiltersin55nmsigebicmostechnology AT pasqualetommasino 10ghzfullydifferentialsallenkeylowpassbiquadfiltersin55nmsigebicmostechnology AT alessandrotrifiletti 10ghzfullydifferentialsallenkeylowpassbiquadfiltersin55nmsigebicmostechnology |