Apparatus and method for generating sine wave

A sine wave and synthetic wave technology, which is applied in the field of devices that generate high-quality sine waves, can solve problems such as the inability to directly generate sine waves, and achieve the effects of simple hardware composition, simplified overall circuit, and improved functions.

Pending Publication Date: 2018-04-03
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, digital circuits can only generate square waves that are fundamentally made up of 0s (zeros) and 1s, but cannot directly generate sine waves

Method used

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  • Apparatus and method for generating sine wave
  • Apparatus and method for generating sine wave
  • Apparatus and method for generating sine wave

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Embodiment Construction

[0026] Hereinafter, a description will be given of an apparatus and method for generating a sine wave according to some embodiments of the present invention with reference to the accompanying drawings.

[0027] One aspect of the present invention provides a system for generating a sine wave signal of a target frequency using two or more square wave signals having different frequencies. The square wave signal from the square wave generator 100 is directly or indirectly fed to the low pass filter 20 for generating a target frequency sine wave signal.

[0028] When the square wave signal of the target frequency is fed to the low-pass filter 20, the generated sine wave signal includes such as Figure 4 Undesirable higher order harmonic components shown. In an embodiment, in order to reduce such harmonic sinusoidal components in the generated signal, at least one square wave signal having a frequency different from the target frequency is additionally fed to a low-pass filter.

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Abstract

Disclosed is an apparatus for generating high-quality sine waves through a simple circuit structure. The apparatus comprises a square wave generator for generating a plurality of square waves different in frequency from one to another; a combined circuit for combining the plurality of square waves into a synthetic wave; and a filter circuit for filtering the synthetic wave through a low-pass filter. Also, a method for generating high-quality sine waves is provided.

Description

technical field [0001] The present disclosure relates to an apparatus and method for generating a sine wave. More particularly, the present disclosure relates to an apparatus and method for generating high-quality sine waves using a simple circuit structure. Background technique [0002] Often, control circuits require high quality sine waves for various purposes. For example, an excitation signal for driving a sensor is input to a resolver circuit for detecting position information of a driving motor in an eco-friendly car. The accuracy of the motor's position information depends on the stability and quality of the sine wave input into the resolver circuit, and accurate position information is indispensable for enhanced motor control. [0003] However, digital circuits can only generate square waves that are essentially made up of 0s (zeros) and 1s, but cannot directly generate sine waves. Therefore, digital circuits are constructed to generate sine waves from square wav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B28/00G06F1/02
CPCG06F1/022H03B28/00H03K3/80H03K5/1252
Inventor 朴宰玄郭相勋姜健洙
Owner HYUNDAI MOTOR CO LTD
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