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Numerically controlled vibrator and its sinusoidal and cosine signal generating method

A numerical control oscillator, cosine signal technology, applied in the direction of automatic power control, electrical components, etc., can solve the problems of high hardware implementation cost, low maximum operating frequency, etc., to reduce search time, improve performance, and improve the maximum operating frequency. Effect

Inactive Publication Date: 2003-08-20
刘建 +3
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Problems solved by technology

[0018] The technical problem to be solved by the present invention is to overcome the problems of low maximum operating frequency and high hardware implementation cost in the existing numerical control oscillator implementation technology, and propose a numerical control oscillator with low hardware implementation cost and high maximum operating frequency and its method for generating sine and cosine signals

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  • Numerically controlled vibrator and its sinusoidal and cosine signal generating method
  • Numerically controlled vibrator and its sinusoidal and cosine signal generating method
  • Numerically controlled vibrator and its sinusoidal and cosine signal generating method

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Embodiment Construction

[0040] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0041] figure 1 , figure 2 , image 3 and Figure 4 It has been explained in detail in the previous narration.

[0042] Figure 5 It is a structural diagram of the dual-output numerically controlled oscillator proposed by the present invention. like Figure 5 As shown, the digitally controlled oscillator with dual output proposed by the present invention includes an accumulator 101, an operating clock unit 103 and a sin-cosine amplitude calculation unit 102; the step size and the operating clock input accumulator 101, and the accumulator 101 outputs after accumulating the step size From the angle value to the sin-cosine amplitude calculation unit 102, the sin-cosine amplitude calculation unit 102 calculates and outputs the corresponding sin-cos signal according to the input angle value, which is the same as figure 1 and image 3 The structure in is t...

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Abstract

The present invention is one numerically controlled vibrator and its sinusoidal and cosine signal generating method. Based on that within the first eighth period, both the sinusoidal function and thecosine function have their absolute values appearing once in the united image, one united amplitude table of sinusoidal function and cosine function in the first eighth period is constituted. Throughtable lookup to determine the sign and corresponding data of current function values, both the sinusoidal function and the consin function signal output is obtained. By means of increasing the width of the data in the table and decreasing looked-up address range in the table, the present invention can raise the vibration frequency of the digit controlled oscillator while maintaining the lower hardware cost of the digital controlled oscillator.

Description

technical field [0001] This invention relates to basic electronic circuits and, more particularly, to an apparatus and method for generating standard digital sine and cosine signals using active element circuits. Background technique [0002] Sine and cosine signal oscillators, as a standard signal source, can be widely used in various modulated communication systems and various instruments that require sine and cosine functions. High precision sine and cosine signal oscillator can generate sine and cosine signals with low frequency error. [0003] As a standard signal, this signal can participate in the modulation and demodulation process of the communication system. Using this signal in the modulation process of the communication system can improve the modulation accuracy of the system and improve the quality of the signal transmitted by the system. Using this signal in the demodulation process of the communication system can effectively reduce the demodulation noise of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B28/00H03L7/00
Inventor 徐大纹
Owner 刘建
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