WPAT, P.C., Intellectual Property Attorneys
Bandgap reference circuit, control circuit, and associated control method
A bandgap reference circuit includes a current generating circuit, a switch circuit and a control circuit. The current generating circuit is triggered by a trigger signal, generated when the bandgap reference circuit starts up, to mirror a base current to generate a first current and a second current. The current generating circuit is arranged to output the first current when triggered by the triggered signal. The switch circuit is controlled by a switch control signal to be selectively coupled between the current generating circuit and a terminal coupled to a regulator. The switch circuit is arranged to, when coupled between the current generating circuit and the terminal, allow the current generating circuit to output the second current to the terminal and accordingly provide a bandgap voltage. When the first current reduces to a predetermined level, the control circuit activates generation of the switch control signal to control the switch circuit.
TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
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inventional inventional additional inventional inventional
Chih-Chiang Yung-Chow Nai Chen Chung-Chieh
Chang Peng Cheng Yang