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Definition of "Roofing Filter" |
A low-pass filter used to reduce unwanted higher frequencies. / A roofing filter is a type of filter used in a HF radio receiver. It is usually found after the first receiver mixer. The goal of a roofing filter is to limit the passband of the first intermediate frequency stage. Strong signals outside the channel which may cause overloading and distortion by the following amplifier stages and mixers are blocked. / An integration type for digital circuits that contain more than one million transistors providing hundreds of thousands of logic gates per chip. |
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