A Novel Design of Low-Voltage VDIBA and Filter Application

In this study, a low-voltage low-power design of previously introduced analog signal processing element called as Voltage Differencing Inverting Buffered Amplifier (VDIBA) is presented. Level shifter current mirrors are used in the circuit design in order to accomplish the low-voltage low-power operation. The configuration operates only with ±0.4 V supply voltages and consumes power 569 μW at the bias current 50 μA. Also, low-voltage transconductor which has highly linear gm is executed with the use of bulk-driven quasi-floating gate (BD-QFG) and source degeneration techniques. The simulations of the introduced circuit have been performed with 0.18 μm TSMC CMOS technology by SPICE. The theoretical approaches have been confirmed by the simulation results

Voltage summing current conveyor (VSCC) for oscillator and summing amplifier applications

In this paper, a voltage summing current conveyor (VSCC) as an active building block for realizing the controlled oscillator and the summing amplifier applications has been presented. The VSCC required low supply voltage as +/- 0.5 V consumes low power and has a simple structure. The controlled oscillator has three passive components. The VSCC based oscillator offers using of the grounded capacitors which are suitable for IC implementation, using the less passive components, very good frequency stability and the low voltage operation. In addition, the summing amplifier has been realized using only one VSCC and a grounded passive resistor. The amplifier provides some advantages such as high accuracy and very high input impedance. The performance of the proposed circuit is simulated with SPICE to confirm the presented theory

Design and Applications of Electronically Tunable Floating Resistor Using Differential Amplifier

In this paper, a new electronically tunable active resistance was introduced. The proposed circuit design consists of only two differential amplifiers. The main advantages of this circuit are higher bandwidth, simpler design and tunable resistance range. Also, the design of the circuit allows negative resistance structure and besides it can be used in IC realizations. Effective range of the floating resistor is controlled within a wide range of resistance in between +/- 43 Omega - +/- 516 k Omega

MOS Transistor Based Low Power and High Speed Fundamental Logic Gates

In this paper, low voltage, low power, high speed and full swing, 1V MOStransistor based fundamental logic gates at 1GHz operation frequency areexamined. The main purpose of this work is to comprehend basic ideas related tologic gate and circuit design research field and lay the foundation for novel designmethods. The other purpose is to show that these full swing logic gates can beperformed under low voltage and high speed conditions. Furthormore, MOStransistor based non-full swing logic gates and how to do them full swing are alsoexamined. Waveforms and numerical results of examined structure's simulationsshow that MOS transistor based fundamental logic gates can be acquired at 1Vsupply voltage and 1GHz operation frequency levels. Theoretical results have beenconfirmed by HSPICE using 65nm CMOS process technology.&nbsp;</p

A Low-Voltage Current Mirror for Transconductance Amplifiers

In this study, a low-voltage current mirror to use in differential pairs as an active load is introduced. The proposed current mirror which can operate at +/- 0.5 V has high output impedance and low input impedance. The proposed structure employs the principle of voltage level-shifting for PMOS transistors. The voltage level-shifting operation has been achieved by using the bulk voltage at this structure. Spice simulations also justify this current mirror's outstanding performance with a bandwidth of 11 GHz using an external capacitor at an input current of 200 mu A