Noise filtering circuit and operating method thereof
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsSung Man PANG, Chang Jae HEO
Life of this patent
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Abstract
There are provided a noise filter circuit and an operating method thereof. A noise filter circuit includes a first delay circuit, and a second delay circuit connected to the first delay circuit in series, wherein the first delay circuit and the second delay circuit each include at least one inverter and at least one delay element for generating a predetermined delay, and the first delay circuit and the second delay circuit have different filtering characteristics.
Claims15
A noise filter circuit, comprising:
- a first delay circuit;
- and
- a second delay circuit connected to the first delay circuit in series,
- wherein the first delay circuit and the second delay circuit re each include at least one inverter and at least one delay element for generating a predetermined delay, and
- the first delay circuit and the second delay circuit have different filtering characteristics.
An operating method of a noise filter circuit, comprising:
- receiving an input signal;
- charging charges in a capacitor when a level of the input signal is changed from a low level to a high level;
- and
- determining a signal output from an inverter connected to the capacitor, based on a first time during which the input signal is maintained at a high level and a second time required to change the voltage of the capacitor, to a threshold voltage of an inverter connected to the capacitor.
An operating method of a noise filter circuit, comprising:
- receiving an input signal;
- inverting the input signal to generate a first signal;
- and
- determining a level of a signal output from an inverter connected to the capacitor, based on a first time during which the first signal is maintained at a high level and a second time required to change the voltage of the capacitor of which the charging or the discharging is determined by the first signal, to a threshold voltage of an inverter connected to the capacitor.
Dependencies are inferred from the claim text.