A Charge-Domain Switched-Gm-C Band-Pass Filter Using Interleaved Semi-Passive Charge-Sharing Technique
| Autor: | Gabor C. Temes, Yue Hu, Spencer Leuenberger, Praveen Kumar Venkatachala, Un-Ku Moon, Yang Xu |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
C band 020208 electrical & electronic engineering Bandwidth (signal processing) 02 engineering and technology Topology law.invention Charge sharing Capacitor Band-pass filter law 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Center frequency Digital biquad filter Voltage |
| Zdroj: | IEEE Transactions on Circuits and Systems I: Regular Papers. 67:600-610 |
| ISSN: | 1558-0806 1549-8328 |
| DOI: | 10.1109/tcsi.2019.2949018 |
| Popis: | A highly reconfigurable charge-domain switched- $g_{\mathrm {m}}$ -C biquad band-pass filter (BPF) topology that utilizes an interleaved semi-passive charge-sharing technique is proposed. It uses only switches, capacitors, linearity-enhanced $g_{\mathrm {m}}$ -stages and digital circuitry for a 3-phase non-overlapping clock scheme. Flexible tunability in both center frequency and −3dB bandwidth is achieved with a scaling-compatible implementation. A 4th-order BPF prototype operating at a 1.2GS/s sampling rate is designed with a cascade of two reconfigurable biquad stages in a 65nm LPE CMOS process. A tunable center frequency of 35–70MHz is measured with programmable bandwidths and a maximum stop-band rejection of 72dB. The measured in-band IIP3 is +12.5dBm. The filter prototype consumes 7.5mW total power from a 1.2V supply voltage, and occupies an active area of 0.17mm2. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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