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Dynamic performance optimization method and optimization device for power amplifier tube in amplifier circuit

A technology for amplifying circuits and dynamic performance, applied in power amplifiers, improving amplifiers to reduce noise effects, etc., can solve problems such as poor performance and output signal waveform distortion, achieve dynamic performance optimization, improve versatility and robustness, The effect of reducing the difficulty of the overall design

Active Publication Date: 2015-04-15
江苏羚翎应急装备科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention discloses a method for optimizing the dynamic performance of a power amplifier tube in an amplifying circuit, which solves the problems of waveform distortion and response delay of the output signal caused by poor performance of the power amplifier tube in the power amplifying circuit

Method used

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  • Dynamic performance optimization method and optimization device for power amplifier tube in amplifier circuit
  • Dynamic performance optimization method and optimization device for power amplifier tube in amplifier circuit
  • Dynamic performance optimization method and optimization device for power amplifier tube in amplifier circuit

Examples

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Effect test

Embodiment 1

[0030] according to figure 2 , including: limiting the saturation interval, releasing the stored charge, maintaining the amplification interval, and example circuits of the three optimization methods; the circuit in the figure adds a saturation limiting circuit on the basis of the original amplification circuit, turning off the optimization circuit and maintaining the resistance R3 of the amplification interval, Among them, the saturation limiting circuit is composed of diode D1, diode D2, and PNP transistor Q3; wherein, the positive pole of D1 is connected to the collector of Q2, the negative pole is connected to the emitter of Q3, the collector of Q3 is connected to the power ground, and the base is connected to the positive pole of D2 , the negative pole of D2 is connected to the collector of Q1, which is the output; the shut-off optimization circuit is composed of a monostable trigger module, resistor R2, voltage regulator tube Z2, and NPN transistor Q4. The input of the m...

Embodiment 2

[0035] according to image 3 , including: limiting the saturation interval, releasing the stored charge, and example circuits of two optimization methods; the circuit in the figure adds a saturation limiting circuit on the basis of the original amplifier circuit, including: diode D1, diode D2, and PNP transistor Q3. The positive pole of D1 is connected to the collector of Q2, the negative pole is connected to the emitter of Q3, the collector of Q3 is connected to the power ground, the base is connected to the positive pole of D2, the negative pole of D2 is connected to the collector of Q1, which is the output; and the shutdown optimization circuit includes : Monostable trigger module, resistor R2, voltage regulator tube Z2, NPN transistor Q4; the input of the monostable module is connected to the drive signal input, and the output is connected to the negative terminal of Z2 after being connected in series with R2. The base of Q4 is connected to the positive terminal of Z2, the...

Embodiment 3

[0039] according to Figure 4 , including: limit the saturation interval, maintain the amplification interval, and the example circuits of the two optimization methods; the circuit in the figure is based on the original amplification circuit and adds: a saturation limiting circuit, including: diode D1, diode D2, PNP transistor Q3, D1's The positive pole is connected to the collector of Q2, the negative pole is connected to the emitter of Q3, the collector of Q3 is connected to the power ground, the base is connected to the positive pole of D2, the negative pole of D2 is connected to the collector of Q1, which is the output; The base of Q2 is connected to the power ground at one end; it is composed together.

[0040] When the power amplifier tube Q1 is close to saturation, the collector voltage is low, causing D1, D2 and Q3 to be turned on, and part of the output current of Q2 will be released to the power ground through D1 and Q3. As a result, the base current of the successf...

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Abstract

The invention provides a dynamic performance amplification method for a power amplifier tube in an amplifier circuit. The dynamic performance of the power amplifier tube is optimized by increasing or decreasing the base current of the power amplifier tube. The method comprises the following step of: decreasing components which cause the accumulation of stored charges and increasing components which facilitate the releasing of the stored charges in the base current to make the base current reach a minimum value which does not influence normal operations; or providing and maintaining the base current not lower than cut-off current to make the power amplifier tube in an amplification interval in the proximate cut-off and cut-off states of the power amplifier tube. Compared with the conventional processing method, the invention is not required to select expensive high-performance power amplifier tubes within a limited type selection range, reduces the overall designing difficulties of the power amplifier circuit, greatly reduces the strict requirements of the power amplifier circuit on a plurality of factors such as load characteristics, operating frequency range and the like, and improves the universality and robustness of the circuit.

Description

technical field [0001] The invention provides a method for optimizing the dynamic performance of a power amplifier tube in an amplifying circuit, and at the same time discloses a circuit device adapted to the method, which belongs to the technical field of electronic circuits. Background technique [0002] In the power amplifier circuit (power amplifier circuit), the dynamic performance of the power amplifier transistor (power amplifier tube) has a decisive impact on the performance of the entire power amplifier circuit. Wherein, when the output current of the power amplifier circuit commutates, the power amplifier tube needs to be turned on and off. This will be limited by the storage time and conduction time of the power tube itself, resulting in a lag in response. Not only will it cause distortion of the output signal waveform and delay in response, limit the operating frequency, but also reduce efficiency. In addition, if the power amplifier tube enters the saturation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/28H03F3/20
Inventor 朱炫霖
Owner 江苏羚翎应急装备科技有限公司