Phase margin, the Glossary

Table of Contents

1. 23 relations: Active filter, Amplifier, BIBO stability, Butterworth filter, Electrical load, Electrical reactance, Electricity, Electronic oscillation, Feedback, Frequency compensation, Frequency response, Gain (electronics), Loop gain, Negative feedback, Nyquist stability criterion, Open-loop gain, Operational amplifier, Passivity (engineering), Phase (waves), Pole splitting, Ringing artifacts, Root locus analysis, Routh–Hurwitz stability criterion.

2. Classical control theory
3. Electronic feedback

Active filter

An active filter is a type of analog circuit implementing an electronic filter using active components, typically an amplifier.

See Phase margin and Active filter

Amplifier

An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the magnitude of a signal (a time-varying voltage or current). Phase margin and amplifier are electronic amplifiers.

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BIBO stability

In signal processing, specifically control theory, bounded-input, bounded-output (BIBO) stability is a form of stability for signals and systems that take inputs. Phase margin and BIBO stability are signal processing.

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Butterworth filter

The Butterworth filter is a type of signal processing filter designed to have a frequency response that is as flat as possible in the passband.

See Phase margin and Butterworth filter

Electrical load

An electrical load is an electrical component or portion of a circuit that consumes (active) electric power, such as electrical appliances and lights inside the home.

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Electrical reactance

In electrical circuits, reactance is the opposition presented to alternating current by inductance and capacitance.

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Electricity

Electricity is the set of physical phenomena associated with the presence and motion of matter possessing an electric charge.

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Electronic oscillation

Electronic oscillation is a repeating cyclical variation in voltage or current in an electrical circuit, resulting in a periodic waveform.

See Phase margin and Electronic oscillation

Feedback

Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause-and-effect that forms a circuit or loop. Phase margin and Feedback are electronic feedback.

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Frequency compensation

In electronics engineering, frequency compensation is a technique used in amplifiers, and especially in amplifiers employing negative feedback.

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Frequency response

In signal processing and electronics, the frequency response of a system is the quantitative measure of the magnitude and phase of the output as a function of input frequency. Phase margin and frequency response are signal processing.

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Gain (electronics)

In electronics, gain is a measure of the ability of a two-port circuit (often an amplifier) to increase the power or amplitude of a signal from the input to the output port by adding energy converted from some power supply to the signal. Phase margin and gain (electronics) are electrical parameters.

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Loop gain

In electronics and control system theory, loop gain is the sum of the gain, expressed as a ratio or in decibels, around a feedback loop. Phase margin and loop gain are electronic amplifiers.

See Phase margin and Loop gain

Negative feedback

Negative feedback (or balancing feedback) occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances. Phase margin and Negative feedback are signal processing.

See Phase margin and Negative feedback

Nyquist stability criterion

In control theory and stability theory, the Nyquist stability criterion or Strecker–Nyquist stability criterion, independently discovered by the German electrical engineer at Siemens in 1930 and the Swedish-American electrical engineer Harry Nyquist at Bell Telephone Laboratories in 1932, is a graphical technique for determining the stability of a dynamical system. Phase margin and Nyquist stability criterion are Classical control theory and signal processing.

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Open-loop gain

The open-loop gain of an electronic amplifier is the gain obtained when no overall feedback is used in the circuit. Phase margin and open-loop gain are electrical parameters.

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Operational amplifier

An operational amplifier (often op amp or opamp) is a DC-coupled electronic voltage amplifier with a differential input, a (usually) single-ended output, and an extremely high gain. Phase margin and operational amplifier are electronic amplifiers.

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Passivity (engineering)

Passivity is a property of engineering systems, most commonly encountered in analog electronics and control systems.

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Phase (waves)

In physics and mathematics, the phase (symbol φ or ϕ) of a wave or other periodic function F of some real variable t (such as time) is an angle-like quantity representing the fraction of the cycle covered up to t. It is expressed in such a scale that it varies by one full turn as the variable t goes through each period (and F(t) goes through each complete cycle).

See Phase margin and Phase (waves)

Pole splitting

Pole splitting is a phenomenon exploited in some forms of frequency compensation used in an electronic amplifier.

See Phase margin and Pole splitting

Ringing artifacts

In signal processing, particularly digital image processing, ringing artifacts are artifacts that appear as spurious signals near sharp transitions in a signal. Phase margin and ringing artifacts are signal processing.

See Phase margin and Ringing artifacts

Root locus analysis

In control theory and stability theory, root locus analysis is a graphical method for examining how the roots of a system change with variation of a certain system parameter, commonly a gain within a feedback system. Phase margin and root locus analysis are Classical control theory.

See Phase margin and Root locus analysis

Routh–Hurwitz stability criterion

In the control system theory, the Routh–Hurwitz stability criterion is a mathematical test that is a necessary and sufficient condition for the stability of a linear time-invariant (LTI) dynamical system or control system. Phase margin and Routh–Hurwitz stability criterion are electronic amplifiers, electronic feedback and signal processing.

See Phase margin and Routh–Hurwitz stability criterion

See also

Classical control theory

• Bode plot
• Causal system
• Classical control theory
• Closed-loop pole
• Closed-loop transfer function
• Complex plane
• Controllability
• Gain scheduling
• Integral windup
• Lead–lag compensator
• Lead–lag effect
• Linear time-invariant system
• Nichols plot
• Nyquist stability criterion
• Observability
• Open-loop controller
• Overshoot (signal)
• Phase margin
• Plant (control theory)
• Positive feedback
• Proportional control
• Proportional–integral–derivative controller
• Root locus analysis
• Setpoint (control system)
• Signal-flow graph
• State observer
• State variable
• State-space representation
• State-transition matrix
• Step response
• Strejc method
• System identification

Electronic feedback

• Asymptotic gain model
• Blackman's theorem
• Bode plot
• Electronic oscillators
• Epistemic feedback
• Feedback
• Negative-feedback amplifier
• Parasitic oscillation
• Phase margin
• Positive feedback
• Return ratio
• Routh–Hurwitz stability criterion
• Self-tuning

References

[1] https://en.wikipedia.org/wiki/Phase_margin