The negative impedance converter ( NIC) is an active circuit which injects energy into circuits in contrast to an ordinary load that consumes energy from them. This is achieved by adding or subtracting excessive varying voltage in series to the voltage drop across an equivalent positive impedance. A negative impedance converter (NIC) is a clever circuit, the analysis of which is a favorite exercise set by engineering lecturers everywhere. It's not often used in practice, but it's well worth having in your design kit-bag. I'll show you two real-life applications once we get through the analysis—which is not as hard as it might seem.
An Introduction to Negative Impedance Converters
The Negative Resistance Converter The consequences of a device that could have this property are puzzling. All ordinary devices have some internal resistance inherent to their construction that automatically dissipates energy when a current is flowing. A negative impedance converter (NIC) is a circuit that simulates a negative impedance at input terminals. A NIC is used in various applications, including analog signal processing and control systems, to stabilize or modify the input impedance of a circuit. The negative impedance converter (NIC) is a one-port op-amp circuit acting as a negative load which injects energy into circuits in contrast to an ordinary load that consumes energy from them. This is achieved by adding or subtracting excessive varying voltage in series to the voltage drop across an equivalent positive impedance. The negative impedance converter (NIC) is an op-amp circuit which acts as a negative load. This is achieved by introducing a phase shift of 180° (inversion) between the voltage and the current for a signal source. There are two versions of this circuit - with voltage inversion (VNIC) and with current inversion (INIC)..
Negative Impedance Converter Altair University
The negative impedance converter (NIC) is a universal circuit - it can act either as VNIC or INIC Contents 1 What is negative impedance converter? 2 How to create negative impedance converters 2.1 Inverting the voltage polarity 2.2 Inverting the current direction 3 How to implement conceptually the resistance inversion 3.1 V-inverted resistor Gm with negative. Reference: S. Szczepanski, J. Jakusz and R. Schaumann, "A linear fully balanced CMOS OTA for VHF filtering applications," in IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, vol. 44, no. 3, pp. 174-187, Mar 1997. Floating bias source: Ma1-Ma3 & Mb1-Mb3. Negative-Impedance Converters Abstract: The conditions under which an active device exhibits an input impedance at one terminal pair which is exactly the negative of the load impedance connected to the other terminal pair are discussed. This paper is devoted to the device properties of the negative-impedance converter (NIC), the derivation of potential NIC circuits and their compensation in order to achieve an exact NIC. The behavior of the NIC as a function of frequency and means of extending its useful frequency range are presented. Attention is also devoted to the sensitivity of the NIC to variations in active and passive.
Negative Impedance converter. Download Scientific Diagram
The negative impedance converter (NIC) is a one-port op-amp circuit acting as a negative load which injects energy into circuits in contrast to an ordinary load that consumes energy from them. This is achieved by adding or subtracting excessive varying voltage in series to the voltage drop across an equivalent positive impedance. Negative impedance converter refers to a two-port network whose electrical characteristics when looked from outside presents as a negative impedance (Fig. 1), as the meanwhile according to the type of input control signal, it can be divided into voltage-controlled impedance converter and current- controlled impedance converter.
Negative-Impedance Converters The NIC shown in Figure 1 uses an op-amp and resistors to produce an input impedance of Z in = -Z. Design and build a NIC with Z in = -10kΩ. Choose the resistors R to keep the op-amp supply current from exceeding its maximum for the rated range of input voltages. This short video shows how NIC or negative impedance converter works and how it can be designed. NIC is a two-port device that can convert an output load o.
Negative impedance converter active circuit implementation of the
Transistor Negative-Impedance Converters Abstract: Negative impedances having very stable characteristics are obtained with circuits using transistors. Current Circuit: Negative Impedance Converter The circuit on the left converts a positive impedance to a negative impedance. So, for example, instead of Ohm's Law (E=IR) it causes a resistor to obey E=-IR. The circuit on the right shows a positive impedance (a 150 ohm resistor) for comparison.
