Linear TIA
时间: 2024-07-15 22:00:32 浏览: 74
Linear Time-Invariant (LTI) systems are a fundamental concept in signal processing and control theory. They describe a class of systems where the output response to an input is solely determined by the system's transfer function, which is both linear and time-invariant. Here's a brief overview:
1. Linearity: LTI systems obey the superposition principle, meaning that the output is the sum of the outputs when individual inputs are applied separately. Also, they exhibit scaling property, where the output for a scaled input is directly proportional to the scale factor.
2. Time-Invariance: The system's output for any input signal is independent of when the input occurred; if you shift the input in time, the output will also be shifted by the same amount but with no change in shape.
3. Transfer Function: The heart of LTI systems is their frequency-domain representation, known as the transfer function, which relates the system's output to its input in terms of sinusoidal signals. This function remains constant over time, and it's a key characteristic that determines how the system processes different frequencies.
In practical applications, LTI systems can be found in many areas like electronics, communication systems, control systems, and digital signal processing. Examples include filters, amplifiers, and simple mathematical operations like convolution.