Current-feedback source-degenerated CMOS transconductor with very high linearity
暂无分享,去创建一个
A highly linear current-feedback (CF) transconductor with resistive source-degeneration is developed in CMOS technology. It consists of a differential source follower cascaded with a classical source-degenerated transconductor with its drain current fed back to modulate the bias of the source follower for nonlinearity cancellation, yielding an overall linear transfer function in the circuit. Designed using a 0.35 µm CMOS process for a continuous-time delta-sigma application, the CF transconductor achieves the total harmonic distortion better than −80 dB up to 1 MHz for a 0.8 V input differential voltage while the supply voltage is 2.5 V and the power consumption is 3.4 mW.
[1] Didier Rene Haspeslagh,et al. A highly linear CMOS G/sub m/-C bandpass filter with on-chip frequency tuning , 1997 .
[2] Terri S. Fiez,et al. Analog VLSI : signal and information processing , 1994 .
[3] Terri S. Fiez,et al. A CMOS transconductor with 80-dB SFDR up to 10 MHz , 2002 .
[4] Ko-chi Kuo,et al. A linear MOS transconductor using source degeneration and adaptive biasing , 2001 .