Linear filters

Analog sampled filter

An analog sampled filter an electronic filter that is a hybrid between an analog and a digital filter. The input is an analog signal, and usually stored in capacitors. The time domain is discrete, however. Distinct analog samples are shifted through an array of holding capacitors as in a bucket brigade. Analog adders and amplifiers do the arithmetic in the signal domain, just as in an analog computer. Note that these filters are subject to aliasing phenomena just like a digital filter, and anti-aliasing filters will usually be required. See Filter design § Anti-aliasing. Companies such as Linear Technology and Maxim produce integrated circuits that implement this functionality. Filters up to the 8th order may be implemented using a single chip. Some are fully configurable; some are pre-configured, usually as low-pass filters. Due to the high filter order that can be achieved in an easy and stable manner, single chip analog sampled filters are often used for implementing anti-aliasing filters for digital filters. The analog sampled filter will in its turn need yet another anti-aliasing filter, but this can often be implemented as a simple 1st order low-pass analog filter consisting of one series resistor and one capacitor to ground. (Wikipedia).

Video thumbnail

Equivalent Analog Filtering (c)

http://AllSignalProcessing.com for more great signal processing content, including concept/screenshot files, quizzes, MATLAB and data files. Studies the equivalent analog filter corresponding to sampling a signal, applying a discrete-time filter, and reconstructing a continuous-time signa

From playlist Sampling and Reconstruction of Signals

Video thumbnail

Frequency Domain Interpretation of Sampling

http://AllSignalProcessing.com for more great signal-processing content: ad-free videos, concept/screenshot files, quizzes, MATLAB and data files. Analysis of the effect of sampling a continuous-time signal in the frequency domain through use of the Fourier transform.

From playlist Sampling and Reconstruction of Signals

Video thumbnail

Practical Sampling Issues

http://AllSignalProcessing.com for more great signal-processing content: ad-free videos, concept/screenshot files, quizzes, MATLAB and data files. Practical requirements for an analog anti-aliasing filter to bandlimit continuous-time signals before sampling.

From playlist Sampling and Reconstruction of Signals

Video thumbnail

Practical DSP and Oversampling

http://AllSignalProcessing.com for more great signal processing content, including concept/screenshot files, quizzes, MATLAB and data files. Limitations of analog anti-aliasing and anti-imaging filters motivate a practical digital filtering approach in which high rates are used for sampli

From playlist Sampling and Reconstruction of Signals

Video thumbnail

Introduction to Frequency Selective Filtering

http://AllSignalProcessing.com for free e-book on frequency relationships and more great signal processing content, including concept/screenshot files, quizzes, MATLAB and data files. Separation of signals based on frequency content using lowpass, highpass, bandpass, etc filters. Filter g

From playlist Introduction to Filter Design

Video thumbnail

reaLD 3D glasses filter with a linear polarising filter

This is for a post on my blog: http://blog.stevemould.com

From playlist Everything in chronological order

Video thumbnail

Discrete noise filters

I discuss causal and non-causal noise filters: the moving average filter and the exponentially weighted moving average. I show how to do this filtering in Excel and Python

From playlist Discrete

Video thumbnail

Quantization and Coding in A/D Conversion

http://AllSignalProcessing.com for more great signal-processing content: ad-free videos, concept/screenshot files, quizzes, MATLAB and data files. Real sampling systems use a limited number of bits to represent the samples of the signal, resulting in quantization of the signal amplitude t

From playlist Sampling and Reconstruction of Signals

Video thumbnail

Lec 14 | MIT RES.6-008 Digital Signal Processing, 1975

Lecture 14: Design of IIR digital filters, part 1 Instructor: Alan V. Oppenheim View the complete course: http://ocw.mit.edu/RES6-008S11 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu

From playlist MIT RES.6-008 Digital Signal Processing, 1975

Video thumbnail

Lecture 18, Discrete-Time Processing of Continuous-Time Signals | MIT RES.6.007 Signals and Systems

Lecture 18, Discrete-Time Processing of Continuous-Time Signals Instructor: Alan V. Oppenheim View the complete course: http://ocw.mit.edu/RES-6.007S11 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu

From playlist MIT RES.6.007 Signals and Systems, 1987

Video thumbnail

Lec 15 | MIT RES.6-008 Digital Signal Processing, 1975

Lecture 15: Design of IIR digital filters, part 2 Instructor: Alan V. Oppenheim View the complete course: http://ocw.mit.edu/RES6-008S11 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu

From playlist MIT RES.6-008 Digital Signal Processing, 1975

Video thumbnail

Oversampling Example

http://AllSignalProcessing.com for more great signal processing content, including concept/screenshot files, quizzes, MATLAB and data files. Illustration of the benefits of oversampling signals when using practical analog anti-aliasing and anti-imaging filters.

From playlist Sampling and Reconstruction of Signals

Video thumbnail

Upsampling

http://AllSignalProcessing.com for more great signal processing content, including concept/screenshot files, quizzes, MATLAB and data files. Frequency domain analysis of upsampling a discrete-time signal (increasing the effective sampling rate) by inserting zeros followed by lowpass filte

From playlist Sampling and Reconstruction of Signals

Video thumbnail

Mathematica Experts Live: Image and Signal Processing

Shadi Ashnai uses a series of examples to demonstrate the new image and signal processing features in Mathematica in this presentation from Mathematica Experts Live: New in Mathematica 9. For more information about Mathematica, please visit: http://www.wolfram.com/mathematica

From playlist Mathematica Experts Live: New in Mathematica 9

Video thumbnail

Demonstration 1: Sampling

Demonstration 1: Sampling, aliasing, and frequency response, part 1 Instructor: Alan V. Oppenheim View the complete course: http://ocw.mit.edu/RES6-008S11 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu

From playlist MIT RES.6-008 Digital Signal Processing, 1975

Video thumbnail

NOTACON 3: Producing Music on a Shoestring Budget

Speakers: James Eastman AKA DJ Vitruvius Micah Waldstein Producing music requires a lot of effort, a lot of time, and a lot of proverbial "blood, sweat and tears," but it doesn't require a lot of money. Freely licensed samples, low tech solutions, and a little dedication and knowledge can

From playlist NOTACON 3

Video thumbnail

EEVblog #1213 - The Oscilloscope Interpolation Trap!

Oscilloscope Sin X/x Interpolation can be a trap for young players, find out why. Forum: http://www.eevblog.com/forum/blog/eevblog-1213-the-oscilloscope-interpolation-trap/ #Oscilloscope #Trap #Interpolation Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgz

From playlist Oscilloscope Tutorials

Video thumbnail

Ionscan 400B Airport substances detector

mikeselectricstuff merchandise : https://mikeselectricstuff.creator-spring.com/ Barringer/Smiths Detection ion mobility spectrometer for finding naughty things on air passengers.

From playlist Teardowns

Video thumbnail

The Discrete Fourier Transform: Sampling the DTFT

http://AllSignalProcessing.com for free e-book on frequency relationships and more great signal processing content, including concept/screenshot files, quizzes, MATLAB and data files.

From playlist Fourier

Related pages

Aliasing | Time domain | Low-pass filter | Anti-aliasing filter | Electronic filter | Digital filter