Patent ID: 9134352
Filing Date: 2015-09-15
Classification: G01R,G09G

Abstract:
1. A current detecting circuit for detecting current of a unit to be detected, which comprises a voltage source, a first mirror current source, a second mirror current source and an inverter, wherein the first mirror current source is configured to provide a reference current, and includes an input terminal, an output terminal and a ground terminal, wherein the input terminal is electrically connected to the voltage source, and the output terminal is electrically connected to the second mirror current source; the second mirror current source is configured to obtain a difference between an output current of the first mirror current source and an output current of the unit to be detected and converts it into a voltage signal, and includes a first input terminal, a second input terminal, a output terminal and a ground terminal, wherein the first input terminal of the second mirror current source is electrically connected to the output terminal of the first mirror current source, and electrically connected to the output terminal of the unit to be detected, and the second input terminal of the second mirror current source is electrically connected to the voltage source; the inverter is configured to amplify the voltage signal and output a detection result, and includes a first input terminal, a second input terminal, an output terminal and a ground terminal, wherein the first input terminal of the inverter is electrically connected to the voltage source, the second input terminal of the inverter is electrically connected to the output terminal of the second mirror current source, and the output terminal of the inverter functions as an output terminal of the current detecting circuit.