Locked detecting circuit, method and phase-locked circuit
A lock detection and circuit technology, applied in the field of communication, can solve the problems of complex lock detection circuit structure, etc., and achieve the effect of simple circuit structure
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[0036] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0037] Figure 1A Is a schematic structural diagram of a phase-locked loop provided by an embodiment of the present invention, such as Figure 1A As shown, the phase locked loop may include a crystal oscillator buffer 101, a frequency discriminator 102, a charge pump 103, a low-pass filter 104, a voltage-controlled vibrator 105, and a frequency divider 106. Wherein, the crystal oscillator buffer 101 is used to buffer the crystal oscillator signal input from the crystal oscillator input terminal to generate a reference signal, and output the reference signal to the frequency discriminator 102, and the frequency discriminator 102 is used to detect the reference signal. The phase difference between the signal and the feedback signal, and output a pu...
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