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Wideband square-law detector having a triangular frequency characteristic as well as a transmission system and a receiver including such a detector
Wideband square-law detector having a triangular frequency characteristic as well as a transmission system and a receiver including such a detector
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机译:具有三角频率特性的宽带平方律检测器以及包括该检测器的传输系统和接收器
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摘要
A square-law detector which provides a square-law relationship between the amplitude of the input signal and the amplitude of the output signal, and having a frequency transfer characteristic which is a continuous function consisting of a rising portion up to a predetermined frequency followed by a falling portion following the predetermined frequency. Thus the frequency characteristic is generally triangular, which is advantageous in that the output signal as function of frequency has a much more uniform, i.e. trapezoidal, pattern than is obtained with a conventional detector having a substantially rectangular frequency transfer characteristic. This is especially important when the detector is used in a receiver for FSK modulated signals having a large frequency deviation, since the modulated signal spectrum then has two relatively discrete power peaks.
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