Abstract: The present invention discloses a high-current high-resolution driving circuit comprising a controller, a digital-to-analog converter and a voltage-to-current converter. The controller is provided for receiving a control signal for operating a load and outputting a digital signal corresponding to the control signal. The digital-to-analog converter is provided for generating an analog voltage signal corresponding to the digital signal. The voltage-to-current converter is provided for generating a current signal corresponding to the analog voltage signal and transmitting the current signal to the load in order to drive the load.

Abstract: The present invention provides an improved current mirror circuit. For example, in a voltage controlled oscillator of a phased-locked loop circuit, MOS device is used to replace a fixed resistor in the control circuit before the current mirror circuit for controlling the mirror currents of the related MOS devices in the phased-locked loop circuit, and for controlling the operating frequency of the phased-locked loop circuit.

Abstract: MOS devices are added respectively to each stage of the voltage-controlled oscillator in a phase-locked loop circuit for improving the operating frequency range and the stability of middle/low frequency thereof, and for continuously and accurately adjusting the frequency.