A 0.25-V 22-nS symmetrical bulk-driven OTA for low-frequency G(m)-C applications in 130-nm digital CMOS process

作者：Colletta Gustavo D; Ferreira Luis H C^*; Pimenta Tales C

来源：Analog Integrated Circuits and Signal Processing, 2014, 81(2): 377-383.

DOI：10.1007/s10470-014-0385-y

• Bulk-driven OTA
• Low voltage
• g(m)-C integrator
• Continuous time integrator
• Operational amplifier
• Low frequency

This paper presents a 0.25-V supplied bulk-driven symmetrical OTA implemented in 130-nm CMOS process. By operating in weak inversion, and using a distributed layout approach, the OTA can benefit from the voltage reduction and high linearity enabled by halo-implanted transistors. The proposed circuit consumes only 10-nW, features a low transconductance of 22-nS, and a total harmonic distortion of 0.53 % for a 100-mV(pp) input voltage, thus making it suitable for low-frequency and low-power -C applications.

• 出版日期2014-11