In this paper is presented a novel constant transconductance CMOS differential amplifier. The circuit uses a modified CMOS inverter to process polarisation currents of the complementary differential amplifier in order to maintain constant transconductance over the entire common-mode input voltage range. Simulation shows error less than ±6.12 % for a single supply voltage of 1.5 V. Key-Words: lo...

A system-on-chip for the application of Electrocardiogram (ECG) monitoring and diagnostic is proposed in this paper, which includes reference circuit, instrumentation amplifier (IA), band-pass filter (BPF), amplifier stage and successive approximation register analog-to-digital converter (SAR-ADC). The Common-Mode Rejection Ratio (CMRR) of IA is greater than 132.87 dB, total gain of the AFE ach...

The use of differential voltage measurements is widely used in EIT instruments. Instrumentation amplifiers are always affected by common mode voltages at their input. These voltages may have different origins, being the current sources and multiplexers the ones which contribute the most. However, even considering ideal current sources and multiplexers, some amount of common mode voltage will al...

One of the main concerns of an underground coal mining engineer is the safety and stability of the mine. One way that the safety and stability can be ensured is to know and understand the coal mine geology and how it reacts to the mining process. One technique that has shown a lot of success in the coal mining industry for geologic technical evaluation purposes is the coal mine roof rating (CMR...

the graphical technique for nonlinear circuits was described that enable us to optimize circuits to obtain maximum output power, maximum efficiency or minimum intermodulation. according to this method a high power amplifier in the ka band was designed. using a nonlinear model of the transistor, optimum slope for load-line was determined so that maximum power at the output was obtainable, then ...

In this paper we present a three-stage fully differential operational amplifier in 120nm digital CMOS. To reach high gain gain-boosted cascodes in the first stage are used. The gain-boost amplifiers are realized as two-stage amplifiers with self cascodes. A DC gain of 108dB and an unity-gain frequency of 1.06GHz are achieved at 1.2V supply. The operational amplifier is appropriate for supply vo...

Abstract. This paper proposes admittance matrix models to approach the behavior of six modern multiport functional blocks called: differential difference amplifier, differential difference operational floating amplifier, differential difference operational mirror amplifier, differential difference current conveyor, current backward transconductance amplifier and current differencing transconduc...

As per the Moore’s law, there is an extreme increase in number of on chip devices, this increase in chip density results in power dissipation and thus the power utilization is unsatisfactory. So to avoid this problem the concept of Low Power system arises. As a part of microelectronics, it has been proposed to make the choice of minute circuit with attraction added by use of MOS cells. Since we...

This paper describes the design of a fully differential CMOS amplifier for clipping control circuit. The amplifier with specification of low settling time less than 5ns, high dynamic range above 90dB and low power supply of 3 volt is designed and realized in a 0.35 μm CMOS process with 3 volt power supply. Simulation confirm the presented design.