LvW
Advanced Member level 6
Hello, I have a question to all who are involved in electronic circuits.
However, the question is not techical but more or less linguistic and concerns the
general speech comprehension.
Problem description: There are some configurations (I avoid the term „electronic circuits“) that exhibit oscillatory properties during transient simulations (in fact: they show self-sustained sinusoidal oscillations). However, only if IDEAL opamps are used. Therefore, only simulations can reveal threse properties.
As soon as real opamp models are used (at least one pole in the open-loop frequency response) there are no oscillations.
Instead, the amplifier output saturates immediately, because the mentioned amplifier pole is shifted to the right half of the s- plane (RHP).
The problem touches the validity of the well-known oscillation condition (Barkhausen) - and the question is simply:
Based on the general speech comprehension - should such a special configuration be called „circuit that is able to oscillate"? Even, if this is the case for ideal (artificial) models only?
Thank you
LvW
However, the question is not techical but more or less linguistic and concerns the
general speech comprehension.
Problem description: There are some configurations (I avoid the term „electronic circuits“) that exhibit oscillatory properties during transient simulations (in fact: they show self-sustained sinusoidal oscillations). However, only if IDEAL opamps are used. Therefore, only simulations can reveal threse properties.
As soon as real opamp models are used (at least one pole in the open-loop frequency response) there are no oscillations.
Instead, the amplifier output saturates immediately, because the mentioned amplifier pole is shifted to the right half of the s- plane (RHP).
The problem touches the validity of the well-known oscillation condition (Barkhausen) - and the question is simply:
Based on the general speech comprehension - should such a special configuration be called „circuit that is able to oscillate"? Even, if this is the case for ideal (artificial) models only?
Thank you
LvW
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