In this study, operational transconductance amplifier (OTA) based simple and practical TiO2 memristor emulator is presented. The proposed memristor emulator employs a multi-outputs OTA, an analog multiplier and a resistor and a capacitor. The parameters of the proposed memristor emulator can be tuned electronically by changing the biasing current of the OTA. Change of the transconductance gain of the OTA provides an advantage: "externally controllable memristor". Non-volatile resistive switching characteristics and an application of this proposed memristor are given. Also, the memristor emulator is implemented using the commonly available OPA860. The effectiveness of the proposed memristor emulator is verified by the experimental results, which show good agreement with the theoretical and simulation results. (C) 2017 Elsevier GmbH. All rights reserved.