Abstract: Disclosed is a phase-locked loop circuit, including: a phase-locked loop, a locking detection circuit, an input end for inputting a reference clock signal, a first output end for outputting an oscillator clock signal, and a second output end for outputting a locking signal, wherein the phase-locked loop is configured to output the oscillator clock signal according to the reference clock signal and control the reference clock signal and the oscillator clock signal to be synchronous; and the locking detection circuit is configured to output the locking signal to the second output end when the oscillator clock signal and the reference clock signal are synchronous.

Abstract: Disclosed is a phase-locked loop circuit, including: a phase-locked loop, a locking detection circuit, an input end for inputting a reference clock signal, a first output end for outputting an oscillator clock signal, and a second output end for outputting a locking signal, wherein the phase-locked loop is configured to output the oscillator clock signal according to the reference clock signal and control the reference clock signal and the oscillator clock signal to be synchronous; and the locking detection circuit is configured to output the locking signal to the second output end when the oscillator clock signal and the reference clock signal are synchronous.

Abstract: A method and circuit for acquiring an output quantity of a linear resonance actuator are disclosed. The method comprises the steps of: establishing a circuit that simulates the linear resonance actuator by using passive electrical devices according to an electrical parameter and a kinematic parameter of the linear resonance actuator, the passive electrical devices comprise at least a resistor, a capacitor and an inductor; selecting a measuring point in the circuit according to an output quantity that the linear resonance actuator needs; and inputting a driving signal of an input source to an input end of the circuit, and collecting an electrical signal that is outputted at the measuring point to obtain the output quantity of the simulated linear resonance actuator.

Abstract: A method and circuit for acquiring an output quantity of a linear resonance actuator are disclosed. The method comprises the steps of: establishing a circuit that simulates the linear resonance actuator by using passive electrical devices according to an electrical parameter and a kinematic parameter of the linear resonance actuator, the passive electrical devices comprise at least a resistor, a capacitor and an inductor; selecting a measuring point in the circuit according to an output quantity that the linear resonance actuator needs; and inputting a driving signal of an input source to an input end of the circuit, and collecting an electrical signal that is outputted at the measuring point to obtain the output quantity of the simulated linear resonance actuator.