Abstrait

Current Mode Computational Circuits for Analog Signal Processing

Amanpreet Kaur, Rishikesh Pandey

The paper presents current adder and subtractor circuits based on cascode current mirror with improved linearity and wide linear range. The proposed circuits can be used for analog signal processing applications such as amplifiers, operational transconductance amplifiers (OTA), Gm-C filters, etc. In the proposed circuits, cascode current mirror topology is employed to improve current mirroring operation. The proposed circuits have been simulated using TSMC 0.18μm CMOS process technology with a supply voltage of 1.8 V. The proposed circuits operate efficiently within the current range of 0 to 80μA with the permissible error percentage of less than 2.5%. The SPICE simulation results have been presented to demonstrate the effectiveness of the proposed circuits