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Sinusoidal reference circuit

A reference circuit, sinusoidal technology, applied in the direction of electrical components, power oscillators, etc., can solve problems such as independent adjustment, inability to realize output signal frequency and amplitude diversification, output signal frequency and amplitude mutual interference, etc.

Inactive Publication Date: 2006-07-19
ASTEC POWER SUPPLY (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, the frequency and amplitude of the output signal of the traditional Wien bridge interfere with each other, cannot be adjusted independently, and cannot realize the diversification of the frequency and amplitude of the output signal

Method used

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  • Sinusoidal reference circuit
  • Sinusoidal reference circuit
  • Sinusoidal reference circuit

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Embodiment Construction

[0035] The present invention is further elaborated below in conjunction with accompanying drawing and embodiment:

[0036] Such as figure 2 As shown, the sinusoidal reference circuit of the present invention includes a reference circuit, an error regulator, a Wien bridge and a detection circuit. The reference circuit is used to provide a reference voltage signal, which is connected to the input of the error regulator, and the output of the error regulator The terminal is connected to the input terminal of the Wien bridge, and the detection circuit is connected between the output terminal of the Wien bridge and the input terminal of the error regulator; the detection circuit detects the output signal of the Wien bridge and feeds the signal back to the error At the input end of the regulator, the error regulator compares the signal with the reference voltage signal to obtain an error signal, which is output to the Wien bridge and adjusts its output signal accordingly.

[0037]...

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Abstract

The invention relates to a sine reference circuit, whose output voltage and the frequency are adjustable, which can be used in bell current module. The invention comprises: an error adjuster, a Wien-Bidge, and detecting circuit. Wherein, said detecting circuit detects the output signal of Wien-Bridge to be feed back to the input of error adjuster; the error adjuster compares the reference signal and said output signal to attain a error signal; the Wien-Bridge according to said error signal to adjust the output signal; the resistance valve of RC network in said Wien-Bridge can be adjusted; said detecting circuit comprises a full-wave rectification circuit. The invention has the function to adjust frequency and can solve the problem of voltage change caused by adjusting frequency, therefore, it can make the frequency and amplitude of output signal adjusted independently.

Description

[technical field] [0001] The invention relates to a sinusoidal signal generator, in particular to a sinusoidal reference circuit with independently adjustable output voltage and frequency applied to a ringing current module. [Background technique] [0002] The ring current power module is a low-power DC / AC inverter, which is mostly used in communication systems and sonar systems. A sinusoidal signal source is required inside the ringing current module, and a simple and high-quality Wien bridge is usually used to generate a sinusoidal signal with a fixed frequency and amplitude, which is used to control the output of the ringing current module. The sinusoidal signal generating circuit of the bridge is as figure 1 As shown in the figure, the reference voltage Vref is connected to the input terminal of the PI regulator through one or more resistors, as the reference signal of the PI regulator, the PI regulator and the Wien bridge are connected to each other, and the Wien bridg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B5/26
CPCH03B5/26
Inventor 白丹张昌盛
Owner ASTEC POWER SUPPLY (SHENZHEN) CO LTD