- See also Signalling theory, a concept in evolutionary biology
Signal theory is the theory of the engineering discipline of signal processing. It provides mathematical approaches for use in a wide range of applications. Fields as far apart as statistical physics and op-amp electronics share some of this material.
High-level aspects include:
- Amplitude
- phase
- resonance
- Q (Q for "quality", means the strength of a resonance)
- time constant (of a filter)
- great-signal and small-signal bandwidth
- maximum output swing
- noise floor
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