In this paper, we present new voltage mode quadrature oscillator, employing single differential difference transconductance amplifier. The proposed oscillator structure consists of two grounded capacitors and a single resistor. The use of grounded capacitors is particularly attractive for integrated circuit implementation. In this way, the frequency of oscillations can be controlled by the biasing current of transconductance stage. Simulation results agree quite well with the theoretical analysis.

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Memory circuit elements are of interest due to their use in different fields of science and technology. In this research, a new multi-outputs operational transconductance amplifiers (MO-OTA)-based memcapacitor emulator is proposed. The proposed emulator employs two OTAs, two capacitors, two resistors and an analog multiplier. The memcapacitor emulator circuit has electronically tunability property. Charge value of the memcapacitor can be adjusted by changing the transconductance [Formula: see text] value with the biasing current of the MO-OTA or frequency value of the input signal. In order to analyze the performance of the proposed circuit, memcapacitor emulator is simulated in 0.18[Formula: see text][Formula: see text]m TSMC CMOS process using LTSPICE and the simulation results are demonstrated.

This paper presents two grounded MOS only active inductor circuits. Both circuits have only two MOS transistors and two biasing currents. Thus, the proposed active inductors provide small chip area, tunability, low power consumption with 150[Formula: see text][Formula: see text]W and 90[Formula: see text][Formula: see text]W, respectively. To analyze their performance, a second-order band-pass filter and a third-order high-pass filter structures are presented with low noise as 7.5[Formula: see text]nV/[Formula: see text] and 9.14[Formula: see text]nV/[Formula: see text], respectively. The designed active inductors and filters are simulated in 0.18[Formula: see text][Formula: see text]m CMOS process parameters using LTSPICE.

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