A low-voltage CMOS transconductor for very high frequencies

This paper presents a pseudo-differential continuous time transconductor for applications in low-voltage systems over the very high frequency range. By using a 0.8 µm CMOS process, the transconductor consumes less than 1.5 mW from a 2.7 V supply. A prototype third-order 60 MHz elliptic lowpass ladder filter with a transmission zero at 200 MHz confirms the feasibility of the proposed transconductor in very-high frequency systems. The measured dynamic range was 57 dB at THD=0.1%. The active area is 0.032 mm²/pole and the power dissipation is 4 mW/pole.