แบบฝึกหัดบทที่ 3
1. Each of the following is a type of filter except passband.
Each of the following is a type of filter : low-pass, high-pass and bandpass
2. The purpose of a(n) mixer is to combine two inputs to create a single output.
3. A(n) amplier actively increases a signal's intensity or strength.
Reference : Wireless# Guide to Wireless Communications Second Edition By: Jorge Olenewa and Mark Ciampa
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