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Power amplifier

A technology of power amplifier and power amplifier tube, applied in the field of electronics, can solve the problems of self-excitation of high-power power amplifier tube, unable to meet the real-time adjustment of waveform, sudden change of drain current, etc.

Inactive Publication Date: 2017-01-11
SICHUAN JIUZHOU ELECTRIC GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the inventors of the present invention have found that when the high-power power amplifier tube drain voltage pulse modulation circuit is working, the drain current mutation is serious, and because the high-power power amplifier tube is prone to self-excitation, it is necessary to interrupt the circuit to adjust the radio frequency pulse waveform , unable to meet the requirements for real-time adjustment of the waveform

Method used

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Embodiment Construction

[0030] The technical solutions of the embodiments of the present invention will be described in detail below through the drawings and specific examples. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of the present invention, rather than the embodiments of the present invention. The limitation of the technical solution, in the case of no conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0031] figure 2 A schematic circuit structure diagram of a power amplifier provided by an embodiment of the present invention, the power amplifier includes:

[0032] A voltage signal generating circuit 10, configured to generate an analog pulse voltage signal;

[0033] The power amplifier tube 20, the gate 21 of the power amplifier tube 20 is used to receive the radio freque...

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Abstract

The embodiment of the invention provides a power amplifier used for carrying out real-time adjustment on radio frequency pulse waveforms. The power amplifier comprises: a voltage signal generating circuit used for generating an analog pulse voltage signal; a power amplifier tube, wherein a grid of the power amplifier tube is used for receiving a radio frequency input signal and the analog pulse voltage signal output by the voltage signal generating circuit, a source electrode of the power amplifier tube is grounded, and a drain electrode of the power amplifier tube is connected to a DC voltage source, wherein the power amplifier tube amplifies the radio frequency input signal by using the analog pulse voltage signal as a bias voltage and outputting an amplified radio frequency output signal through the drain electrode.

Description

technical field [0001] Embodiments of the present invention relate to the field of electronic technology, and in particular to a power amplifier. Background technique [0002] In many applications, there are high requirements on the waveform of the output pulse signal. For example, the waveform of the output pulse signal in a UHF rangefinder (English: distance measure equipment, DME) should meet the narrow-band rise time not exceeding 3 microseconds, the broadband rise time is no more than 1.6 microseconds, the pulse width is 3.5±0.5 microseconds, and the pulse fall time is no more than 3.5 microseconds. [0003] At present, the method of pulse modulation of the drain voltage of the high-power power amplifier tube is usually used to output the radio frequency pulse signal that meets the conditions. figure 1 It is a schematic diagram of a high-power power amplifier tube drain voltage pulse modulation circuit. [0004] However, the inventors of the present invention have fou...

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Application Information

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IPC IPC(8): H03F3/20
CPCH03F3/20
Inventor 杨洋杨杰彭朗荣沫
Owner SICHUAN JIUZHOU ELECTRIC GROUP