Chapter V Phase Locked Loops for High Frequency Transmitters and Receivers
نویسنده
چکیده
PLL Basics A phase-locked loop is a feedback system combining a voltage controlled oscillator and a phase comparator so connected that the oscillator frequency (or phase) accurately tracks that of an applied frequencyor phase-modulated signal. Phase-locked loops can be used, for example, to generate stable output frequency signals from a fixed low-frequency signal. The phase locked loop can be analyzed in general as a negative feedback system with a forward gain term and a feedback term. A simple block diagram of a voltage-based negative-feedback system is shown in Figure 1.
منابع مشابه
Analog Dialogue 33 - 3 ( 1999 ) 1 Phase - Locked Loops for High - Frequency Receivers and Transmitters – Part 1
PLL Basics A phase-locked loop is a feedback system combining a voltagecontrolled oscillator and a phase comparator so connected that the oscillator frequency (or phase) accurately tracks that of an applied frequencyor phase-modulated signal. Phase-locked loops can be used, for example, to generate stable output frequency signals from a fixed low-frequency signal. The first phase-locked loops w...
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