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Intelligent program-controlled high-gain amplifier with temperature compensation

A technology of temperature compensation and program-controlled amplification, which is applied to amplifiers, improved amplifiers to reduce nonlinear distortion, and gain control. The effect of avoiding distortion and improving driving ability

Inactive Publication Date: 2021-12-21
山东汉芯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the automatic control and automatic measurement system, it is necessary to convert some non-electrical parameters, such as temperature, humidity, speed, pressure, etc., into electrical signals through sensors. These weak electrical signals need to be amplified and filtered before they can be accurately extracted. , when the amplitude of the measured signal varies in a large range, in order to ensure the consistency of the measurement accuracy, it is necessary to change the range of the amplifier, which is usually realized by a program-controlled amplifier. The output signal is amplified by power to drive the required load, but the traditional program-controlled amplifier Still using a manual program-controlled switch or controlling the analog switch to switch the gain resistor through digital code control to change the gain effect of the program-controlled amplifier, manual real-time monitoring is required and the resistance of the gain resistor is fixed, so the gain of the program-controlled amplifier cannot be adjusted more accurately, and the power is amplified. In the module, the performance of the transistor will change with the increase of temperature, and the traditional bias is difficult to keep the power amplifier circuit stable in a large temperature range

Method used

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  • Intelligent program-controlled high-gain amplifier with temperature compensation
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  • Intelligent program-controlled high-gain amplifier with temperature compensation

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Embodiment 2

[0028] Embodiment 2: On the basis of Embodiment 1, please refer to figure 2 , in a specific embodiment of the intelligent programmable high-gain amplifier with temperature compensation described in the present invention, the frequency detection module 1 includes a signal amplification unit 101, a voltage control unit 102, a signal shaping unit 103 and a voltage conversion unit 104;

[0029] Specifically, the signal amplifying unit 101 is configured to perform a primary amplification process on the input signal and output a primary amplified signal;

[0030] a voltage control unit 102, configured to increase the voltage of the first-stage amplified signal and output it;

[0031] a signal shaping unit 103, configured to shape and output the signal output by the voltage control unit 102;

[0032] A voltage conversion unit 104, configured to perform voltage conversion on the signal output by the signal shaping unit 103 and output a square wave signal whose frequency is consisten...

Embodiment 3

[0035] Example 3: On the basis of Example 1, please refer to Figure 3(A), Figure 3(B) and Figure 4 , in a specific embodiment of the intelligent programmable high-gain amplifier with temperature compensation according to the present invention, the main control module 2 includes a first controller U1, and the voltage control module 3 includes a digital-to-analog converter U2;

[0036] Specifically, the first output end of the first controller U1 is connected to the input end of the digital-to-analog converter U2, and the output end of the digital-to-analog converter U2 is connected to the gain control end of the program-controlled amplification module 4;

[0037] Further, the program-controlled amplification module 4 includes a first operational amplifier OP1A1, a first resistor R1, a second resistor R2 and a first power supply VCC1;

[0038] Specifically, the inverting end of the first operational amplifier OP1A1 is connected to one end of the first resistor R1 and one end of...

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Abstract

The invention discloses an intelligent program-controlled high-gain amplifier with temperature compensation, and relates to the technical field of electronic circuits. The amplifier comprises a frequency detection module, a main control module, a voltage control module, a program-controlled amplification module, a boost amplification module, a power supply module and a temperature compensation module. The frequency detection module detects input signal frequency, the main control module is used for receiving signals and outputting control signals, the voltage control module is used for adjusting direct-current voltage, the program control amplification module is used for adjustable primary amplification, the boost amplification module is used for power amplification, the power supply module is used for providing power, and the temperature compensation module is used for temperature compensation. According to the intelligent program-controlled high-gain amplifier with the temperature compensation function, the microcontroller is used for controlling the gain bandwidth adjustable amplifier in a direct-current voltage control mode, the boosting type power amplifier is used for carrying out power amplification on signals, temperature compensation is adopted, and the efficiency of the amplifier is improved.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a program-controlled amplifier with temperature compensation. Background technique [0002] In the automatic control and automatic measurement system, it is necessary to convert some non-electrical parameters, such as temperature, humidity, speed, pressure, etc., into electrical signals through sensors. These weak electrical signals need to be amplified and filtered before they can be accurately extracted. , when the amplitude of the measured signal varies in a large range, in order to ensure the consistency of the measurement accuracy, it is necessary to change the range of the amplifier, which is usually realized by a program-controlled amplifier. The output signal is amplified by power to drive the required load, but the traditional program-controlled amplifier Still using a manual program-controlled switch or controlling the analog switch to switch the gain resist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03G3/20H03F1/30H03F1/32
CPCH03G3/20H03F1/30H03F1/32H03F2200/261H03F2200/447
Inventor 徐辉张航张孝忠郭剑汤富强黎梓兰刘仁飞
Owner 山东汉芯科技有限公司