A 33 MHz 70 dB-SNR Super-Source-Follower-Based Low-Pass Analog Filter

作者：De Matteis Marcello^*; Pezzotta Alessandro; D'Amico Stefano; Baschirotto Andrea

来源：IEEE Journal of Solid-State Circuits, 2015, 50(7): 1516-1524.

DOI：10.1109/JSSC.2015.2411626

• Analog filters
• biquadratic cell
• CMOS 0.18 mu m
• continuous-time filters
• low power
• super source follower

In this paper, a 4th-order low-pass continuous-time analog filter is presented, that is implemented with the cascade of two efficient and compact biquadratic cells, realized using the Super-Source-Follower topology. The biquadratic cell uses only two capacitors and four transistors: two transistors for the signal processing and two transistors as current sources for biasing purpose. The 4th-order filter prototype has been integrated in 0.18 mu m CMOS technology. For a 33 MHz cut-off frequency, the filter performs 18 dBm-IIP3 for two tones at 2 MHz and 3 MHz, with total current of 770 mu A from a single 1.8 V supply voltage.

• 出版日期2015-7