Design of CMOS OTA core for practical education

In this paper is presented an operational transconductance amplifier (OTA) core. With this core can be configured and reconfigured the two most frequently used OTA circuits - Miller's OTA (with frequency correction) and simple OTA (without frequency correction). The core architecture is built of an analog transistor array, which allows examination of the circuits for a wide range of reference current. With these characteristics the described core is very appropriate for education in each contemporary course of analog VLSI electronics.