A Reconfigurable-Band Analog Filter Standard-Cell Based on Differential/Single Input Signaling
This work presents a reconfigurable-band analog filter capable of performing the low-pass, high-pass, band-pass or all-pass functions. The proposed filter is a simple and compact cell composed of only two RC networks and one differential Operational Transconductance Amplifier (OTA). To select the de...
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| Format: | Article |
| Language: | English |
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IEEE
2024-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/10413452/ |
| _version_ | 1797338512015491072 |
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| author | Alejandro Diaz-Sanchez Gregorio Zamora-Mejia Jose M. Rocha-Perez Jose L. Vazquez-Gonzalez Uriel G. Zapata-Rodriguez |
| author_facet | Alejandro Diaz-Sanchez Gregorio Zamora-Mejia Jose M. Rocha-Perez Jose L. Vazquez-Gonzalez Uriel G. Zapata-Rodriguez |
| author_sort | Alejandro Diaz-Sanchez |
| collection | DOAJ |
| description | This work presents a reconfigurable-band analog filter capable of performing the low-pass, high-pass, band-pass or all-pass functions. The proposed filter is a simple and compact cell composed of only two RC networks and one differential Operational Transconductance Amplifier (OTA). To select the desired filter type, two configurations must be done: 1) the two RC network shall be configured as low-pass/low-pass, high-pass/high-pass or low-pass/high-pass, 2) the input signals must be fed in differential or single mode. To validate theory and simulations, the proposed reconfigurable-band filter was designed, fabricated and measured to meet the biomedical band (0.1 Hz - 10 kHz) in a <inline-formula> <tex-math notation="LaTeX">$0.5 ~\mu \text{m}$ </tex-math></inline-formula> CMOS standard fabrication process. To achieve the extremely low RC time constants imposed by the biomedical band, the R element was implemented using PMOS high-value programmable resistor. The prototype exhibits a silicon area of <inline-formula> <tex-math notation="LaTeX">$470 ~\mu \text{m}$ </tex-math></inline-formula> x <inline-formula> <tex-math notation="LaTeX">$250 ~\mu \text{m}$ </tex-math></inline-formula> and a power consumption of <inline-formula> <tex-math notation="LaTeX">$96.32 ~\mu \text{W}$ </tex-math></inline-formula> using a ± 0.8 V symmetric power supply. Due to this circuit’s ability to perform four filter-functions, its operation band can be tuned over five decades, its power consumption is in the nano and micro-watt regime, and it is area compact, the proposed analog filter is a suitable candidate for being an analog standard-cell. |
| first_indexed | 2024-03-08T09:32:19Z |
| format | Article |
| id | doaj.art-cc6a47e0b6a149b69d27cd14f02709bb |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-03-08T09:32:19Z |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-cc6a47e0b6a149b69d27cd14f02709bb2024-01-31T00:01:15ZengIEEEIEEE Access2169-35362024-01-0112135861360010.1109/ACCESS.2024.335821210413452A Reconfigurable-Band Analog Filter Standard-Cell Based on Differential/Single Input SignalingAlejandro Diaz-Sanchez0https://orcid.org/0000-0003-4529-6864Gregorio Zamora-Mejia1https://orcid.org/0000-0002-6509-0305Jose M. Rocha-Perez2https://orcid.org/0000-0002-3694-2468Jose L. Vazquez-Gonzalez3https://orcid.org/0000-0002-2368-3786Uriel G. Zapata-Rodriguez4Instituto Nacional de Astrofísica, Óptica y Electrónica—INAOE, Puebla, MexicoConsejo Nacional de Humanidades, Ciencia y Tecnología—CONACyT, Ciudad de México, MexicoInstituto Nacional de Astrofísica, Óptica y Electrónica—INAOE, Puebla, MexicoDepartment of Computing, Electronics and Mechatronics, Universidad de las Américas Puebla, Puebla, MexicoFaculty of Electrical and Electronics Engineering, Universidad Veracruzana, Veracruz, MexicoThis work presents a reconfigurable-band analog filter capable of performing the low-pass, high-pass, band-pass or all-pass functions. The proposed filter is a simple and compact cell composed of only two RC networks and one differential Operational Transconductance Amplifier (OTA). To select the desired filter type, two configurations must be done: 1) the two RC network shall be configured as low-pass/low-pass, high-pass/high-pass or low-pass/high-pass, 2) the input signals must be fed in differential or single mode. To validate theory and simulations, the proposed reconfigurable-band filter was designed, fabricated and measured to meet the biomedical band (0.1 Hz - 10 kHz) in a <inline-formula> <tex-math notation="LaTeX">$0.5 ~\mu \text{m}$ </tex-math></inline-formula> CMOS standard fabrication process. To achieve the extremely low RC time constants imposed by the biomedical band, the R element was implemented using PMOS high-value programmable resistor. The prototype exhibits a silicon area of <inline-formula> <tex-math notation="LaTeX">$470 ~\mu \text{m}$ </tex-math></inline-formula> x <inline-formula> <tex-math notation="LaTeX">$250 ~\mu \text{m}$ </tex-math></inline-formula> and a power consumption of <inline-formula> <tex-math notation="LaTeX">$96.32 ~\mu \text{W}$ </tex-math></inline-formula> using a ± 0.8 V symmetric power supply. Due to this circuit’s ability to perform four filter-functions, its operation band can be tuned over five decades, its power consumption is in the nano and micro-watt regime, and it is area compact, the proposed analog filter is a suitable candidate for being an analog standard-cell.https://ieeexplore.ieee.org/document/10413452/CMOScontinuous-time filteranalog standard celluniversal filtervery-low frequency |
| spellingShingle | Alejandro Diaz-Sanchez Gregorio Zamora-Mejia Jose M. Rocha-Perez Jose L. Vazquez-Gonzalez Uriel G. Zapata-Rodriguez A Reconfigurable-Band Analog Filter Standard-Cell Based on Differential/Single Input Signaling IEEE Access CMOS continuous-time filter analog standard cell universal filter very-low frequency |
| title | A Reconfigurable-Band Analog Filter Standard-Cell Based on Differential/Single Input Signaling |
| title_full | A Reconfigurable-Band Analog Filter Standard-Cell Based on Differential/Single Input Signaling |
| title_fullStr | A Reconfigurable-Band Analog Filter Standard-Cell Based on Differential/Single Input Signaling |
| title_full_unstemmed | A Reconfigurable-Band Analog Filter Standard-Cell Based on Differential/Single Input Signaling |
| title_short | A Reconfigurable-Band Analog Filter Standard-Cell Based on Differential/Single Input Signaling |
| title_sort | reconfigurable band analog filter standard cell based on differential single input signaling |
| topic | CMOS continuous-time filter analog standard cell universal filter very-low frequency |
| url | https://ieeexplore.ieee.org/document/10413452/ |
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