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Simulation of Reconfigurable FET Circuits Using Sentaurus TCAD Tool
Published in Ashish Raman, Deep Shekhar, Naveen Kumar, Sub-Micron Semiconductor Devices, 2022
Remya Jayachandran, Rama S. Komaragiri, K. J. Dhanaraj
An OTA buffer circuit capable of driving capacitive loads is used in LCD column drivers. Unity gain single OTA buffer circuit driving resistive load is analyzed in detail in Ref. [32]. A buffer amplifier is a circuit with high input resistance and low output resistance that enables maximum power transfer. CMOS buffer circuits capable of driving capacitive loads and resistive loads are available in the literature. We have implemented a simple unity gain buffer amplifier using an OTA to drive low-resistance load. The buffer amplifier design is demonstrated using an SG-RFET OTA in the Sentaurus TCAD tool. The detailed study of the OTA buffer amplifier using MOSFET is presented in Ref. [32]. The gain variation depicts the low-resistance load driving capability of the SG-RFET unity gain buffer amplifier similar to the MOSFET OTA buffer amplifier. The gain is reduced as in the conventional unity gain buffer circuit with a decrease in load.
Discrete Transistor Circuitry
Published in Douglas Self, Small Signal Audio Design, 2020
A buffer stage is used to isolate two portions of circuitry from each other. It has a high input impedance and low output impedance; typically it prevents things downstream from loading things upstream. The use of the word “buffer” normally implies “unity-gain buffer”, because otherwise we would be talking about an amplifier or gain stage. The gain with the simpler discrete implementations is in fact slightly less than one. The simplest discrete buffer circuit-block is the one-transistor emitter-follower; it is less than ideal both in its mediocre linearity and its asymmetrical load-driving capabilities. If we permit ourselves another transistor, the complementary feedback-pair (CFP) configuration gives better linearity. Both versions can have their load-driving performance much improved by replacing the emitter resistor with a constant-current source or a push-pull Class-A output arrangement.
Computer Interface and Instrumentation Electronics
Published in Felix Alberto Farret, Marcelo Godoy Simões, Danilo Iglesias Brandão, Electronic Instrumentation for Distributed Generation and Power Processes, 2017
Felix Alberto Farret, Marcelo Godoy Simões, Danilo Iglesias Brandão
A direct application of the noninverting amplifier of Figure 1.13 is the buffer, i.e., a circuit that provides a high impedance at the input, but capable of driving a higher current, i.e., a low impedance at the output. The circuit is shown in Figure 1.14, consisting of an open circuit to the ground at the inverting input (Z = ∞) and a short circuit between the amplifier output terminal and the inverting input (Zf = 0) [19,20]. The output signal vo of this amplifier is the exact duplication of the input signal vi, but then the load current is fed by the amplifier voltage supply from the amp-op output. In this way, the amplifier can be used to reproduce the input signal without loading the previous stage (this is the reason this circuit is called buffer), because the load becomes an infinite impedance for the amplifier input and a zero output impedance for the buffer amplifier.
Application of Behavioral Psychology in Clothing Design from The Perspective of Big Data
Published in Applied Artificial Intelligence, 2023
Signal buffer circuits implement impedance transformation from one circuit to another. Transformers that match impedance can be utilized in any AC circuit and for any task where maximum power transfer is sought. In audio equipment, microphones, amplifiers, data networks, phone systems, telephone grids, and aviation communication systems, they are frequently used. In this way, the input impedance of the amplifier connected with the lead can be made large enough and the output impedance is small, which can prevent the influence of the input end on the amplifying circuit behind the buffer stage and play an isolation role. Since the output resistance of this stage is the source internal resistance of the subsequent stage circuit, the latter stage amplifier should reduce the source internal resistance to obtain a larger source signal. Connecting a high-impedance source to a low-impedance load without significantly attenuating or distorting the signal is the main purpose of signal buffer circuits. As a result, without loading the source, a buffer’s output voltage replicates its input voltage.
Control algorithm for coordinated operation of wind-solar microgrid standalone generation system
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2022
Sombir Kundu, Madhusudan Singh, Ashutosh K. Giri
A prototype of 3P3W wind-battery-based system is designed in the laboratory, as depicted in Figure 10. The Hall-effect sensors circuit is utilized to measure the voltages and currents of the standalone system. For a balanced three-phase three-wire standalone system, two Hall-effect sensors (LEM LA-25) are utilized for sensing PCC current of phases “a” and “b”, respectively. Similarly, three current sensors (LEM LA-25) are utilized for sensing the load current side. These current sensors operate at 15 V DC supply. The output of the sensors is fed to the ADC channel of DSP-dSPACE 1104 through appropriate buffer circuitry. Moreover, the sensed voltage signal from the voltage sensor is fed to the buffer circuitry. The buffer circuitry is designed using an operational amplifier (OP-07) with appropriate resistance values. A buffer has a unity gain that has high input resistances and extremely low output resistances. The system’s dynamics performance results were recorded using the four channels of the KEYSIGHT INFINII VISION DSO-X 2024A. The results were recorded in the steady state using the HIOKI PQ3100 power quality analyzer. The observed experimental results and harmonic indices of the standalone system have been shown in Figures 11(a,b), Figure 12(a,b) and Figure 13(a,b). The dynamic response of SOSF-FLL control approach and standalone system is expressed as follows.