A new four-quadrant (4Q) Multiplier complementally using linear and saturation regions of MOSFET (Metal Oxide Semiconductor Field Effect Transistor) is proposed for the wide dynamic range and superior flexibility of the input range. This multiplier operates in the region except for the threshold voltage VT to zero. The validity of the proposed circuit is confirmed through HSPICE simulation.

In this paper, we propose a floating resistor circuit with positive and negative resistance operating at the low supply voltages 1.5 V. Only two transistors are connected between supply lines in order to operate under the low power supply voltages. In this circuit, current subtraction is carried out at the gate terminal for which input/output voltage is applied. As a result, the proposed circuit can realize the large range of resistance of positive and negative resistances. Therefore, in an application, the proposed circuit is used in neuro-based limit cycle generator as synaptic weights.

In this report, we propose a new bilateral floating resistor circuit having both positive and negative resistance values. The equivalent resistance of this floating resistor in CMOS technology can be changed by using controlled-voltages, which is an advantage over polysilicon or diffused resistor in the integrated circuit. Moreover the characteristics of the proposed circuit are independent of the threshold voltage. We have simulated the proposed circuit by using HSPICE. Finally, we have confirmed that the proposed circuit is useful as an analog component.