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Program-control high-gain frequency selective amplifier

A program-controlled amplification and high-gain technology, which is applied in the direction of improving the amplifier to expand bandwidth, gain control, and amplification control. It can solve the problem of limited output of the amplifier and achieve high precision, high performance, and stable and reliable results.

Inactive Publication Date: 2016-03-09
牛誉博
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The output of the amplifier is always limited, which is limited by the device itself and the requirements of the A / D for the input signal.

Method used

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Embodiment Construction

[0016] Such as figure 1 Shown is a block diagram of a program-controlled high-gain frequency-selective amplifier system. The figure includes DDS module, pre-stage fixed amplifier module, high-gain program-controlled amplifier module, program-controlled option module, post-stage fixed amplifier module, MSP430 single-chip microcomputer, key input module, liquid crystal display module; through DDS direct digital frequency synthesizer (DirectDigitalSynthesizer ) specified input signal, through the pre-stage fixed gain amplifier module, the voltage signal is amplified to the working range suitable for the post-stage op amp, and then enters the high-gain program-controlled amplifier module, and the size of the amplification gain is controlled by the single-chip microcomputer MSP430, which is 80dB ~100dB program control, and finally get a high-precision output signal through a fixed amplifier circuit in the later stage.

[0017] Such as figure 2 As shown in the embodiment, it is a...

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Abstract

Provided is a program-control high-gain frequency selective amplifier. The program-control high-gain frequency selective amplifier has following beneficial effects: central frequency is precisely controlled; stable and reliable operation is achieved; a higher performance index is obtained; more flexibility is realized; a gain adjustment range is board; high-precision high-resolution high-gain program-control amplification is easily achieved; and stability, reliability and high precision are obtained. The program-control high-gain frequency selective amplifier comprises a DDS module, a front-stage fixing amplification module, a high-gain program-control amplification module, a program-control option module, a back-stage fixing amplification module, an MSP430 single-chip computer and a liquid crystal display module. The key point of the structure is described in that a voltage signal is amplified within the operation range suitable for back-stage operation via an input signal designated by a DDS direct digital synthesizer and the front-stage fixing amplification module; the magnitude of amplification gain is controlled by the single-chip computer MSP430 when the front-stage fixing amplification module is entered so that program control within the frequency range of 80dB-100dB; and finally, an output signal with higher precision is obtained via a back-stage fixing amplification circuit.

Description

technical field [0001] The invention is applied in the field of automatic control and automatic measurement systems, and in particular relates to a program-controlled high-gain frequency-selective amplifier. Background technique [0002] In the automatic control and automatic measurement system, it is necessary to convert some non-electrical parameters (such as temperature, speed, pressure) into electrical signals through sensors. After these weak electrical signals are amplified, they can drive measurement, recording agencies or control actuators. , so as to realize automatic control or automatic measurement. In digital signal processing, the requirements for the amplifier are put forward by the A / D that undertakes the digitization of the signal. [0003] With the development of signal processing technology, the signal to be processed is becoming more and more complex, such as large dynamic range, increased bandwidth, etc.; therefore, special requirements are put forward f...

Claims

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Application Information

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IPC IPC(8): H03F1/42H03G3/20
Inventor 牛誉博臧涵畅
Owner 牛誉博
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