1. A continuous-level memristor emulator circuit, comprising: a first current feedback operational amplifier (CFOA) having y, x, z and w terminals; a second CFOA having y, x, z and w terminals, the w terminal of the second CFOA being connected to they terminal of the first CFOA; an operational transconductance amplifier (OTA) having a negative input, a positive input, and an output, the OTA negative input being connected to the w terminal of the first CFOA, the OTA output being connected to they terminal of the second CFOA; a resistor R 3 connected between ground and they terminal of the second CFOA; a resistor R 2 connected between ground and a control input of the OTA; a resistor R 1 connected between ground and the z terminal of the second CFOA; a capacitor C 1 connected between ground and the z terminal of the first CFOA; and a capacitor C 2 connected between ground and the x terminal of the second CFOA.