Applications of analog integrated circuits
Applications of analog integrated circuits
Analysis and design of integrated electronic circuits, 2nd ed.
Analysis and design of integrated electronic circuits, 2nd ed.
Microelectronics, 2nd ed.
Microelectronic circuits, 2nd ed.
Microelectronic circuits, 2nd ed.
Introduction to electronics design (2nd ed.)
Introduction to electronics design (2nd ed.)
Automatic control systems (7th ed.)
Automatic control systems (7th ed.)
Electronic devices and circuit theory (6th ed.)
Electronic devices and circuit theory (6th ed.)
Electronic devices (5th ed.)
Designing Electronic Circuits
Integrated Electronics: Analog Digital Circuits and Systems
Integrated Electronics: Analog Digital Circuits and Systems
A note on determination of oscillation startup condition
Analog Integrated Circuits and Signal Processing
Failure of Barkhausen oscillation building up criterion: Further evidence
Analog Integrated Circuits and Signal Processing
Comment: A note on determination of oscillation startup condition
Analog Integrated Circuits and Signal Processing
Discussion on the general oscillation startup condition and the Barkhausen criterion
Analog Integrated Circuits and Signal Processing
Electronic Principles
Identification of a class of two CFOA-based sinusoidal RC oscillators
Analog Integrated Circuits and Signal Processing
On the Barkhausen and Nyquist stability criteria
Analog Integrated Circuits and Signal Processing
New two CFOA-based sinusoidal RC oscillators with buffered outlet
Analog Integrated Circuits and Signal Processing
Comment on "Identification of a class of two CFOA-based sinusoidal RC oscillators"
Analog Integrated Circuits and Signal Processing
On `Discussion on Barkhausen and Nyquist stability criteria'
Analog Integrated Circuits and Signal Processing
Reply to comment on "Identification of a class of two CFOA-based sinusoidal RC oscillators"
Analog Integrated Circuits and Signal Processing
On modified Wien-bridge oscillator and astable oscillator
Analog Integrated Circuits and Signal Processing
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Most textbooks on analog circuits and signal processing describe the Barkhausen criterion pertaining to the determination of sinusoidal oscillations in a closed-loop system. On the other hand, the Nyquist stability criterion is well known, as discussed in most textbooks on control systems. Recently, some examples in which the Barkhausen criterion fails to produce the correct condition for startup of oscillations have been reported. In the present paper, an explanation of oscillation startup based on the Nyquist stability criterion is given and the close relationship between the Barkhausen and the Nyquist criteria highlighted. It is shown that the Nyquist criterion (which is a rigorous technique) is a more robust approach than the Barkhausen criterion concerning the determination of sinusoidal oscillations in a closed-loop system and that the Barkhausen criterion (whenever it yields the correct result) is subsumed by the Nyquist criterion as a special case. The textbooks usually describe the Barkhausen criterion as a separate topic, i.e., do not discuss the relationship of this criterion with the Nyquist criterion. It is, therefore, felt that the present discussion will go a long way to put the subject in a broader perspective.