Patent ID: 9152157
Filing Date: 2015-10-06
Classification: G05F

Abstract:
1. A fast response current source, comprising: a constant current generating block, coupled to a first feedback terminal, for providing a first constant current to flow through the first feedback terminal; a first feedback capacitor, coupled between an output terminal and the first feedback terminal, for coupling a voltage variation of the output terminal to the first feedback terminal when a voltage of the output terminal has one of a rising variation and a falling variation; a first current buffer, coupled to the first feedback terminal, for generating a first buffering current to flow through the first feedback terminal, and changing a current value of the first buffering current in response to a corresponding current variation of the first feedback terminal when the voltage at the output terminal has the falling variation; and a first output current generating block, coupled to the first current buffer, for generating a first output current to flow through the output terminal, and changing a current value of the first output current in response to a corresponding variation of the first buffering current, wherein when the voltage at the output terminal has the falling variation, the first buffering current is increased, and the first output current is increased according to the increasing of the first buffering current.