Mediatek Singapore Pte. Ltd.

Cheng Tao

Kun Lan

Yu-Kai Chou

Yue Feng

A control circuit includes: a first current generating circuit arranged for generating at least one output current according to a reference signal; a second current generating circuit arranged for generating a reference current corresponding to the reference signal according to the reference signal; and a follower circuit coupled to the second current generating circuit for generating a control current according to the reference current, and feeding back the control current to the first current generating circuit from the second current generating circuit in a signal-following manner to control the reference signal.

Control circuit employing follower circuit to control reference signal and related circuit control method

A switch-driving circuit and a Digital-to-Analog Converter (DAC) using the switch-driving circuit are provided. The switch-driving circuit includes a main cell and a reference cell. The main cell includes a current source and a resistance-control component electronically connected to the current source. The reference cell is coupled to the current source and the resistance-control component, and includes a first loop, the first loop is configured to track a target reference voltage so as to provide at least one first control voltage to control a resistance change of the resistance-control component. The reference cell and the main cell are implemented by MOS transistors in place of capacitors which occupy an increased circuit area, rendering reduced circuit area for the switch-driving circuit, and decreasing manufacturing costs. Further, the switch-driving circuit outputs a voltage signal with reduced noise, increasing the performance of the Digital-to-Analog Converter.

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Hefei, China

Cheng Tao