13.4 An Inverse-Designed Passively Coupled N-Path Filter with g m -Boosted Active HBT Switches
Abstract
A$0.8-\text{to}-2.6 \text{GHz} \mathrm{N}$-path filter with$\mathrm{g}_{\mathrm{m}}$-boosted HBT switches and inverse-designed nonresonant passive networks is presented to enhance dynamic range and tunability of passively coupled higher-order N-path filters. A hybrid real-binary inverse design algorithm capable of inserting variable-size MIM capacitors in layouts enables synthesis of compact multilayered low-GHz passives. A BiCMOS filter prototype achieves$>15 \text{dBm}$P1dB,$
Fields of Study & Subjects
Microwave Engineering and Waveguides
Analog and Mixed-Signal Circuit Design
Radio Frequency Integrated Circuit Design
Publication details
- Journal / source
- 2026 IEEE International Solid-State Circuits Conference (ISSCC)
- Publisher
- IEEE
- Pages
- 234–236
- Publication date
- 15 February 2026