NOISE DETECTING CIRCUIT AND ASSOCIATED SYSTEM AND METHOD

• Main Authors: HORNG, JAW-JUINN, LIEN, BEI-SHING
• Format: Patent
• Language: English
• Published: 16.11.2023
• Subjects: AMPLIFIERS; BASIC ELECTRONIC CIRCUITRY; ELECTRICITY

A noise detecting circuit including an amplifier circuit amplifying an input signal indicating a noise level of a circuit to be detected and output an amplified signal; a filtering circuit receiving and filtering the amplified signal and output a filtered signal; and a comparing circuit receiving and compare the filtered signal to a reference voltage and output an output signal; wherein the filtering circuit includes: an output terminal; and a first filter selectively coupled to the output terminal, including: a sub-output terminal; a switch selectively coupling the sub-output terminal to the output terminal; a resistor, wherein a terminal of the resistor is coupled to the amplifier circuit and another terminal of the resistor is coupled to the sub-output terminal; and a capacitor, wherein a terminal of the capacitor is coupled to the sub-output terminal and another terminal of the capacitor is coupled to a reference voltage source.