–This paper presents a highly linear Operational Transconductance Amplifier (OTA) that combines two linearization techniques, one with adaptive biasing of differential pairs and second with resistive source degeneration. The Operational Transconductance Amplifier has ±0.9v power supply. Operational Transconductance Amplifier has been simulated with TANNER 0.18μm CMOS technology in Tspice. The s...

For low-voltage, low-power circuit design, the linear model for operational amplifiers is insufficient to accurately predict the static and dynamic behavior of the circuit. This paper introduces a nonlinear model for operational amplifiers based on amplifiers’ DC transfer characteristic. By using this nonlinear model, the behavior of an operational amplifier with feedback network can be describ...

The advantages of negative feedback are well known in electronics and extensively used in the operational amplifier. The properties of such a system are nearly independent of the parameters in the forward branch of the system; they are only determined by external elements in the backward branch. An optical analog of such an operational amplifier is reported. The essential operations, amplificat...

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Three different configurations have been reported for programming explicitly inverting, positive fractional and non-inverting gains, respectively. This paper proposes a single operational amplifier digitally programmable circuit for a set of arbitrary gains, which may include inverting, positive fractional and/or non-inverting gains, with minimum number of elements. The design procedure is illu...

The voltage and current offsets of two typical precision operational amplifiers (OPAs) with BJT and FET input, respectively, were continuously measured for two years. The paper presents the experiment, explains the method of data analysis, and discusses the results. The long-term stability turns out to be limited mainly by random walk processes.

Syllogistic reasoning is modeled in analog hardware and some hardware models, i.e. syllogisms Baroco and Darii are presented. Chaining of syllogisms is modeled by using original min-max entities (circuits), “to see” whether the two rules, modeled in dedicated hardware, i.e., IF A THEN B and IF B THEN C imply the “hardware” rule IF A THEN C. The preliminaries include original min-max circuits ba...