Noise analysis of operational amplifier circuits using MATLAB

Asparuhova, Katya; Gadjeva, Elissaveta

doi:10.1109/isse.2004.1490859

Cited by 5 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are multiple noise sources originating from OPAMP's internal operations such as inverting and non-inverting input current noises and input voltage noise. There is another noise source called thermal noise emerging from the feedback resistor R f [32]. The noise sources are independent from each other so that they can be added using root sum of squares (RSS).…”

Section: Noise Analysismentioning

confidence: 99%

Analysis and design of a transimpedance amplifier based front-end circuit for capacitance measurements

2020

View full text Add to dashboard Cite

In this study, transimpedance amplifier based front-end circuits which can be employed to measure small capacitances were designed, analyzed and simulated using analog electronic circuit simulator. The front-end circuit converts the current flowing through the measured capacitance into a modulated voltage value which contains information regarding the desired capacitance. The frequency-domain, time-domain, stability and noise analyzes were carried out numerically and in simulation environment using a circuit simulator. The analytical, numerical and simulation results can be used to design optimized, precise and stable transimpedance amplifiers with low-noise value. The measured capacitance value was 10 pF which is low enough to simulate various real-world applications. Three commercially available, off-the-shelf operational amplifiers with different peripheral passive components were employed for computer based analysis. The designed transimpedance amplifiers are suitable to connect with capacitance extraction circuits which use analog or digital demodulation techniques.

show abstract

Section: Noise Analysismentioning

confidence: 99%

Analysis and design of a transimpedance amplifier based front-end circuit for capacitance measurements

2020

View full text Add to dashboard Cite

show abstract

“…We can see that the low-noise version uses roughly ten times as much power as the low-power one. This is due to the higher current drained by the LT1028 low-noise Op-Amp, since the input transistors of this Op-Amp are operated at nearly 1 mA of collector currents to achieve low voltage noise (since voltage noise is inversely proportional to the square root of the collector current) 20 . For the purpose of remote application of our circuit we estimate that a 4 Ah battery (the one used in our tests) can power the low-power version for ∼ 40 days in continuous operation (assuming V in = 2.5 V) and the low-noise version for ∼ 3.5 days.…”

Section: Operating Principles and Instrumentationmentioning

confidence: 99%

Novel circuit design for high-impedance and non-local electrical measurements of two-dimensional materials

Sanctis

Mehew

Alkhalifa

et al. 2018

Review of Scientific Instruments

View full text Add to dashboard Cite

Two-dimensional materials offer a novel platform for the development of future quantum technologies. However, the electrical characterisation of topological insulating states, non-local resistance, and bandgap tuning in atomically thin materials can be strongly affected by spurious signals arising from the measuring electronics. Common-mode voltages, dielectric leakage in the coaxial cables, and the limited input impedance of alternate-current amplifiers can mask the true nature of such high-impedance states. Here, we present an optical isolator circuit which grants access to such states by electrically decoupling the current-injection from the voltage-sensing circuitry. We benchmark our apparatus against two state-of-the-art measurements: the non-local resistance of a graphene Hall bar and the transfer characteristic of a WS field-effect transistor. Our system allows the quick characterisation of novel insulating states in two-dimensional materials with potential applications in future quantum technologies.

show abstract

“…The higher the value of the feedback loop resistor, the higher the gain and the noise of the amplifier, whereas the bandwidth decreases. In such a single-ended configuration, the resistor thermal noise directly affects the current signal generated by the QTF [13]. Transimpedance amplifiers have been widely employed for studying the performance of QEPAS sensors [14][15][16] and QTFs [17,18].…”

Section: Introductionmentioning

confidence: 99%

Front-End Amplifiers for Tuning Forks in Quartz Enhanced PhotoAcoustic Spectroscopy

et al. 2020

View full text Add to dashboard Cite

A study of the front-end electronics for quartz tuning forks (QTFs) employed as optoacoustic transducers in quartz-enhanced photoacoustic spectroscopy (QEPAS) sensing is reported. Voltage amplifier-based electronics is proposed as an alternative to the transimpedance amplifier commonly employed in QEPAS experiments. The possibility to use differential input/output configurations with respect to a single-ended configuration has also been investigated. Four different architectures have been realized and tested: a single-ended transimpedance amplifier, a differential output transimpedance amplifier, a differential input voltage amplifier and a fully differential voltage amplifier. All of these amplifiers were implemented in a QEPAS sensor operating in the mid-IR spectral range. Water vapor in ambient air has been selected as the target gas species for the amplifiers testing and validation. The signal-to-noise ratio (SNR) measured for the different configurations has been used to compare the performances of the proposed architectures. We demonstrated that the fully differential voltage amplifier allows for a nearly doubled SNR with respect to the typically used single-ended transimpedance amplifier.

show abstract

Noise analysis of operational amplifier circuits using MATLAB

Cited by 5 publications

References 1 publication

Analysis and design of a transimpedance amplifier based front-end circuit for capacitance measurements

Analysis and design of a transimpedance amplifier based front-end circuit for capacitance measurements

Novel circuit design for high-impedance and non-local electrical measurements of two-dimensional materials

Front-End Amplifiers for Tuning Forks in Quartz Enhanced PhotoAcoustic Spectroscopy

Contact Info

Product

Resources

About