Abstract
This paper presents a circuit topology for a Gm-C biquad filter, suitable for low frequency signals with low amplitude. The low cutoff frequencies are obtained reducing the transconductance Gm through a current division technique. Moreover, all the active devices are operating in weak inversion mode lowering the requirements for the level of the voltage power supply. A second and fourth order filter configuration, based on a Tow-Thomas biquad, is designed and simulated. The filter operates in weak inversion with a supply of 0.9V, achieves a cutoff frequency of 52Hz, and power consumption around 2.8μW. The integrated noise is 24.4μVrms, the dynamic range is 43dB, and the filter shows -40dB THD for 5mV input peak amplitude.
Original language | English |
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Title of host publication | Proceedings of the 23rd International Conference Mixed Design of Integrated Circuits and Systems, MIXDES 2016 |
Editors | Andrzej Napieralski |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 207-210 |
Number of pages | 4 |
ISBN (Electronic) | 9788363578084 |
DOIs | |
Publication status | Published - 2 Aug 2016 |
Event | 23rd International Conference Mixed Design of Integrated Circuits and Systems, MIXDES 2016 - Lodz, Poland Duration: 23 Jun 2016 → 25 Jun 2016 |
Conference
Conference | 23rd International Conference Mixed Design of Integrated Circuits and Systems, MIXDES 2016 |
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Country/Territory | Poland |
City | Lodz |
Period | 23/06/16 → 25/06/16 |
Keywords
- biquad
- gm-C filter
- low cutoff frequency
- weak inversion