High-pass filter, low-pass filter, band-pass filter, band-stop filter, detector and frequency selection

QWE4562009

High-pass filter, low-pass filter, band-pass filter, band-stop filter, detector and frequency selection [Copy link]

High-pass filter, low-pass filter, band-pass filter, band-stop filter, detector and frequency selection 1. These filters require op amp + capacitor to be implemented. Are there any integrated filter chips? This can eliminate a lot of selection calculations, including cutoff frequency (multi-order filters have multiple capacitors and resistors, which ones need to be included in the calculation? For applied technology, a lot of mathematical techniques are a difficult problem) 2. Are detection and frequency selection both filters, the same concept? Are there any special frequency selection or detection chips? If there is a chip that can be flexibly programmed and can select the frequency according to the required frequency, it will be convenient and will be an innovative move.

combat

Filters are divided into active and passive. Those using op amps are all active. Both active and passive filters need to calculate parameters such as cutoff frequency, bandwidth, insertion loss/gain, in-band flatness, and out-of-band rejection ratio.

476700838

Integrated circuits can integrate analog and digital circuits on a single chip to make devices such as analog-to-digital converters and digital-to-analog converters.

jimtien

The switched capacitor filter can realize the original poster's wish.

Detection is not filtering, although detection usually requires a filter

QWE4562009

jimtien posted on 2022-8-26 12:25 The switched capacitor filter can realize the original poster's wish. Detection is not filtering, although detection usually requires a filter

Switched capacitor filter? I can't find it online.

QWE4562009

jimtien posted on 2022-8-26 12:25 The switched capacitor filter can realize the original poster's wish. Detection is not filtering, although detection usually requires a filter

What is the difference between detection and filtering? Detection is actually frequency selection.