What is Frequency Response (as it applies to regulators)?
Frequency response is the response of a control loop to small-signal perturbations. In the case of regulators, the perturbations are often caused by noise in the system. The control loop has the IC reference voltage as its input, and the regulator output voltage as its output. Regulator input voltage is one of the things that modifies the control loop gain. Frequency response is usually measured in terms of gain in dB (decibels) and phase shift over frequency, and it is often displayed in a Bode Plot. In many cases, the unity-gain crossover frequency and phase margin are given as figures of merit for a given regulator design. The Power WEBENCH Online Design tools include an electrical simulator that can be used to show the frequency response of a switching regulator design.
Related Questions
- If an amps frequency response is 20 to 20K Hz, and some rife frequencies call for anything below 20hz, how can the amp reproduce that frequency?
- Are current hydrophone low frequency response standards acceptable for measuring mechanical/cavitation indices?
- What is Stability (as it applies to regulators)?
