Low-Power CMOS CNN Cell and its Application to an Oscillatory CNN

In this paper, we propose a low-power operational transconductance amplifier (OTA) for low-power CMOS cellular neural networks (CNN) cell. The OTA use MOSFETs operating in the weak inversion region. The transconductance g m can be changed by changing the external bias voltage. The proposed OTA is verified by HSPICE simulations with the 0.18 ㎛ standard CMOS device parameters. From the results, the power consumption is less than 3.5 ㎼ with 1.2 V power supply. As an application of the proposed OTA, an oscillatory CNN circuit using two CNN cells with the proposed OTA is presented.