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A High Frequency AC Power Supply Control Circuit for Electron Tube Power Amplifier

A power control circuit, high-frequency AC technology, applied in transducer circuits, irreversible AC power input conversion to DC power output, control/regulation systems, etc. and other problems, to achieve the effect of simple circuit structure and reasonable design

Active Publication Date: 2021-06-25
佛山市冉智电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the core power amplification component used in the tube power amplifier is a tube, and the power supply of the tube filament requires low voltage and high current, the above three methods of power supply have the following disadvantages: the first type of power supply has AC hum (that is, power frequency Interference); the use of the second power supply and the third power supply has the problems of low power factor and low efficiency, and the low-voltage DC power supply will generate a deflection magnetic field that will affect the electron current emission, weaken the electron emission kinetic energy and reduce the service life of the electron tube

Method used

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  • A High Frequency AC Power Supply Control Circuit for Electron Tube Power Amplifier
  • A High Frequency AC Power Supply Control Circuit for Electron Tube Power Amplifier
  • A High Frequency AC Power Supply Control Circuit for Electron Tube Power Amplifier

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Embodiment Construction

[0025] The present invention and its beneficial technical effects will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0026] It should be noted that the descriptions involving "first", "second" and so on in the present invention are only for the purpose of description, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one technical feature.

[0027] see Figure 1~Figure 5 , the high-frequency AC power supply control circuit of the electronic tube power amplifier preferably implemented in the present invention includes a high-frequency AC power supply that provides power for the electronic tube. Circuit 14, electron tube 17, and power-on start-up circuit 15 and oscillating circuit 16, described power-on start...

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Abstract

The invention discloses a high-frequency AC power supply control circuit for an electron tube power amplifier. The high-frequency AC power supply includes a sequentially connected π-type filter circuit, a rectifier circuit, a filter circuit, a load circuit, a power-on start-up circuit and an oscillation circuit; the π-type filter circuit Connected to the mains, the output end of the power-on start-up circuit is connected to the control end of the oscillation circuit, the input end of the oscillation circuit is connected to the filter circuit, and the output end of the oscillation circuit is connected to the input end of the load circuit. Its advantage is that it adopts a new type of electronic tube filament power supply mode, and effectively solves the AC hum of various power sources in the prior art through high-efficiency, high-frequency, high-frequency AC power that neither affects sound quality nor affects the life of the electronic tube. , low power factor and low efficiency; at the same time, it also solves the technical problems that the deflection magnetic field generated by the low-voltage DC power supply affects the electron current emission, and the weakened electron emission kinetic energy affects the life of the electron tube; the key power device protection measures are comprehensive.

Description

technical field [0001] The invention relates to the field of audio power amplifiers, and more specifically relates to a power supply control circuit for filaments of electronic tube power amplifiers. Background technique [0002] In the field of audio power amplifiers (referred to as power amplifiers), at present, according to their power amplifier components, they are mainly divided into two types, namely transistor power amplifiers and tube power amplifiers. Due to its small power, the large dynamic effect of the tube power amplifier is very weak. After the appearance of the transistor power amplifier, because the transistor power amplifier has the characteristics of low cost, small size, and high power, it has a good support for pop music, especially the big dynamic. It has replaced tube amplifiers in the mainstream market. However, because the tube power amplifier also has its unique characteristics, such as the sound is natural and sweet, with "gut taste", it can repro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/04H02M1/44H02M3/335H04R3/00
CPCH02M1/44H02M3/33569H02M7/04H04R3/00H04R2203/00
Inventor 朱红勇
Owner 佛山市冉智电子科技有限公司
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