I need an allpass filter to delay the audio signal,but I dont know how to design ti. Who can help me ?(some relevant data or circuit diagram with the process of the design )
I suggest you read the Linear Circuits Handbook. It is a comprehensive and practical guide to analog circuits.
Chapter 10, talks about passive components: resistors (R), capacitors (C) and inductors (L). F, stands for frequency.
You may also find our online Filter Wizard design tool helpful. You should also consider constructing a model of your filter with our free spice simulator, ADIsimPE.
As far as common values for components, it varies widely and depends heavily on other constraints such as frequency range, signal amplitude, system power, size, and cost.
Please take a look at http://www.analog.com/static/imported-files/tutorials/MT-202.pdf and let us know if you have questions.
Thanks a lot ! This mini tutorial I had seen it before,but sorry I know very litter about.So excuse me,can I ask you some questions: 1、What are the units of these parameters(R、C、F) ? 2、For second-order allpass , Whats the common valve of C and Q ? 3、What parameters should I pay attention to when I choose amplifers ?
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