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Creators/Authors contains: "Tapen, Thomas"

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  1. ; (, IEEE European Solid-State Circuits Conference)
    We present a tunable LNA for software defined radio based on a compact, tunable transmission line (CTTL) element. The CTTL acts as a passive, widely tunable LC resonance in a cascoded, common source LNA to implement an instantaneously narrowband, multi-octave tunable LNA. The resulting circuit, fabricated in 65nm CMOS, is tunable from 3.5-20GHz, and consumes 12 mW with gain >12dB, ≥ -9.6dBV in-band OP1dB, and OOB B1dB up to 31dB higher than the in-band B1dB due to the CTTL-tuned LC filtering. The CTTL-tuned LNA represents a more blocker-tolerant approach to achieving high frequency, software-defined LNAs without significant compromises in other LNA performance metrics. 
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  2. ; ; (, 2021 IEEE Radio Frequency Integrated Circuits Symposium (RFIC))
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  3. ; ; ; ; (, IEEE Transactions on Circuits and Systems I: Regular Papers)
    null (Ed.)
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  4. ; ; ; ; (, IEEE Transactions on Circuits and Systems I: Regular Papers)
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  5. ; ; ; ; ; (, 2018 IEEE Radio Frequency Integrated Circuits Symposium (RFIC))
    A highly-integrated dual technology (28nm and 130nm SOI) widely tunable software-defined RF duplexing front-end for FDD, FD, and TDD applications is presented. Predistortion and harmonic upconversion are used to cancel second and third harmonics generated by PA nonlinearity by up to 30 dB. A novel form of non-reciprocal, distributed degeneration is used to suppress TX noise that desensitizes the RX for full duplex operation. The distributed degeneration network improves RX noise figure by 7dB over baseline TX operation for same channel TX-RX. The transceiver achieves a 23dBm output power while maintaining more than 30dB of TX-RX isolation over the 0.8-1.2GHz band. 
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