论文信息 - A Digitally Calibrated Current-Voltage Feedback Transconductor in 0.13-μm CMOS Process

A Digitally Calibrated Current-Voltage Feedback Transconductor in 0.13-μm CMOS Process

A digitally calibrated transconductor for high-speed operation with its linearity enhanced by negative feedback is proposed. This voltage-to-current converter is mainly composed of two parts: an operational transconductance amplifier (OTA) and a pair of feedback resistors. The measured spurious free dynamic range (SFDR) of the transconductor is 72.6 dB when the input frequency is 100 MHz. To compensate common-mode deviation due to process variation, digital calibration circuits are added. Fabricated in TSMC 0.13-μm CMOS process, the transconductor occupies 250 × 200 μm2 active area and consumes 5.06 mW from a 1.2-V supply.

Soon-Jyh Chang | Ying-Zu Lin | Yen-Ting Liu

[1] John B. Hughes,et al. Switched-currents : an analogue technique for digital technology , 1993 .

[2] Terri S. Fiez,et al. A CMOS transconductor with 80-dB SFDR up to 10 MHz , 2002 .

[3] A.H.M. van Roermund,et al. A CMOS V-I converter with 75-dB SFDR and 360-/spl mu/W power consumption , 2005, IEEE Journal of Solid-State Circuits.

[4] Ramón González Carvajal,et al. A compact tunable CMOS transconductor with high linearity , 2005, IEEE Transactions on Circuits and Systems II: Express Briefs.

[5] David A. Johns,et al. Analog Integrated Circuit Design , 1996 .

[6] Francois Krummenacher,et al. A 4-MHz CMOS Continuous-Time Filter with On-Chip Automatic Tuning , 1987, ESSCIRC '87: 13th European Solid-State Circuits Conference.

[7] A.J. Lopez-Martin,et al. A CMOS transconductor with multidecade tuning using balanced current scaling in moderate inversion , 2005, IEEE Journal of Solid-State Circuits.