scholarly journals EMI Susceptibility of the Output Pin in CMOS Amplifiers

Electronics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 304 ◽  
Author(s):  
Anna Richelli ◽  
Luigi Colalongo ◽  
Zsolt Kovacs-Vajna
Keyword(s):  
Operational Amplifier ◽  
Single Stage ◽  
Operational Amplifiers ◽  
Output Impedance

Measurements in commercial devices demonstrate a considerable susceptibility of the operational amplifiers to the electromagnetic interferences coupled to their output pin. This paper investigates some basic architectures starting from single stage amplifiers up to a whole operational amplifier. The result is a correlation between the different amplifier configurations, the output impedance and the susceptibility to the interferences. The simulations are perfomed by using the standard CMOS UMC 180nm technology and by running the netlist of the schematics extracted from the layout.

Single-Stage Operational Amplifiers

1995 ◽  
pp. 87-110
Author(s):  
Satoshi Sakurai ◽  
Mohammed Ismail
Keyword(s):  
Single Stage ◽  
Operational Amplifiers

A Technique to Design Robust Single-Stage Operational Amplifier

2020 ◽  
pp. 469-478
Author(s):  
Abhinit Saurabh ◽  
Amresh Kumar ◽  
Shashank Kumar Dubey ◽  
Aminul Islam
Keyword(s):  
Operational Amplifier ◽  
Single Stage

A bicausal bond graph representation of operational amplifiers

2003 ◽  
Vol 217 (1) ◽  
pp. 49-58 ◽  
Author(s):  
P J Gawthrop ◽  
D Palmer
Keyword(s):  
Operational Amplifier ◽  
Mechanical Systems ◽  
Graph Model ◽  
Bond Graph ◽  
Electromechanical System ◽  
Graph Representation ◽  
Operational Amplifiers ◽  
Electronic Circuits ◽  
Graph Interpretation ◽  
Virtual Earth

The virtual earth concept, well known to designers of active electronic circuits with operational amplifier components, is shown to have a novel bicausal bond graph interpretation. This leads to simplified bond graph modelling of such circuits. Some simple operational amplifier circuits, together with a more complex active filter, are used to illustrate the approach. A complex electromechanical system shows that the method is useful in creating a unified bond graph model of systems involving both analogue electronic and mechanical systems.

scholarly journals A sub-1-V high-gain single- stage operational amplifier

2008 ◽  
Vol 5 (7) ◽  
pp. 211-216 ◽  
Author(s):  
S. Alireza Zabihian ◽  
Reza Lotfi
Keyword(s):  
Operational Amplifier ◽  
High Gain ◽  
Single Stage

scholarly journals Design of Howland current sources using differential evolution optimization

2020 ◽  
Vol 11 (1) ◽  
pp. 96-100
Author(s):  
Kaue Felipe Morcelles ◽  
Lucas Hermann Negri ◽  
Pedro Bertemes-Filho
Keyword(s):  
Mathematical Modeling ◽  
Differential Evolution ◽  
Operational Amplifier ◽  
Automated Design ◽  
Bioimpedance Spectroscopy ◽  
Output Impedance ◽  
Design Constraints ◽  
Electrical Bioimpedance ◽  
Ratio Condition

AbstractHowland circuits have been widely used in Electrical Bioimpedance Spectroscopy applications as reliable current sources. This paper presents an algorithm based on Differential Evolution for the automated design of Enhanced Howland Sources according to arbitrary design constraints while respecting the Howland ratio condition. Results showed that the algorithm can obtain solutions to commonly sought objectives, such as maximizing the output impedance at a given frequency, making it a versatile method to be employed in the design of sources with specific requirements. The mathematical modeling of the source output impedance and transconductance, considering a non-ideal operational amplifier, was validated against SPICE simulations, with results matching up to 10 MHz.

Current Feedback Operational Amplifiers: A Tutorial

1995 ◽  
Vol 32 (2) ◽  
pp. 108-123 ◽  
Author(s):  
B. L. Hart
Keyword(s):  
Operational Amplifier ◽  
Operational Amplifiers ◽  
Transient Responses ◽  
Current Feedback ◽  
Current Feedback Operational Amplifiers ◽  
Voltage Feedback ◽  
Current Feedback Operational Amplifier ◽  
A Current

Current feedback operational amplifiers: a tutorial In a didactic approach, the amplifying properties of an inverter stage using a current feedback operational amplifier (COA) and one using a voltage feedback operational amplifier (VOA) are compared. Then, following a discussion of COA modelling, the frequency and transient responses of a COA non-inverter stage are analysed.

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