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![Nagarjuna Nallam Headshot](https://confcats-catavault.s3.amazonaws.com/CATAVault/ieeecass/master/files/styles/cc_user_photo/s3/user-pictures/19981.jpg?h=2c4e73f8&itok=rPbYQDfm)
- Affiliation
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AffiliationIndian Institute of Technology Guwahati
- Country
N-path circuits based on switched capacitors and switched transmission lines have become prominent RF circuits due to their frequency translational characteristics. All these N-path circuits that have been demonstrated in the recent past are based on a single network topology containing 'N' parallel branches. This paper presents a dual N-path filter that is derived from the single-port switched capacitor bandpass filter (BPF). This dual N-path filter is based on switched inductors and exhibits series resonance at the clock frequency. Analytical expressions for transfer function and input impedance of the dual N-path filter are derived and verified. This capacitor-less N-path filter is suitable for implementations in planar technologies in which high-value (vertical) capacitors are not available. Moreover, the dual topology with other impedance elements offers more options to circuit designers for the implementation of N-path filters.