A 250 MHz low voltage low-pass Gm-C filter

Tien Yu Lo, Chung-Chih Hung*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


A high speed and high linearity Gm-C low-pass filter is presented. The proposed OTA is designed under low power supply voltage consideration while its gain, excess phase, and linearity are well maintained. The common-mode control system, including common-mode feedback and common-mode feedforward circuits, is added to ensure stability of the proposed filter. Measurement results show that the inter-modulation distortion of -40 dB can be achieved with 250 MHz 400 mVpp balanced differential input signals. The filter works in 1 - V supply voltage and its power consumption is 32 mW.

Original languageEnglish
Pages (from-to)465-472
Number of pages8
JournalAnalog Integrated Circuits and Signal Processing
Issue number3
StatePublished - 1 Jan 2012


  • Filter
  • Operational transconductance amplifier (OTA)
  • Ultra-wide band system

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