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Bias circuit for a power amplifier and power amplifier

A power amplifier and bias circuit technology, applied in the field of radio frequency/microwave, can solve the problems of large energy loss, inability to meet the ultra-broadband working requirements of the power amplifier, etc., and achieve the effect of increasing the gain

Active Publication Date: 2021-10-29
SHENZHEN CITY SIGLENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present application provides a bias circuit for a power amplifier to solve the technical problem that the bias circuit of the power amplifier in the prior art has a large energy loss and cannot meet the ultra-wideband working requirements of the power amplifier

Method used

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  • Bias circuit for a power amplifier and power amplifier
  • Bias circuit for a power amplifier and power amplifier
  • Bias circuit for a power amplifier and power amplifier

Examples

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Effect test

Embodiment 1

[0036] Please refer to image 3 , is a schematic circuit diagram of a bias circuit in an embodiment, including a bias circuit 100 and a power amplifier 200 . The bias circuit 100 is used to provide a static working current to the power amplifier 100 . The bias circuit 100 includes a bias connection terminal, a DC power supply connection terminal, a self-resonant circuit 1 , a decoupling filter circuit 2 , a triode circuit 3 , a power sharing circuit 4 and an operation holding circuit 5 . The triode circuit 3 includes a triode Q1. The bias connection end is used for connecting with the output end of the power amplifier 200 , and the DC power connection end is used for the input of a DC power supply 6 . The self-resonant circuit 1 is respectively connected to the second pole connection and the bias connection terminal of the transistor Q1. The self-resonant circuit 1 is used to prevent the AC signal output by the power amplifier 200 from flowing backward, and also prevent the...

Embodiment 2

[0046] Please refer to Figure 4 It is a schematic structural diagram of a bias circuit board in another embodiment, and the bias circuit board includes a bias circuit wiring area 10 . A bias circuit is arranged on the bias circuit wiring area 10, and the bias circuit includes a bias connection terminal, a DC power supply connection terminal, a self-resonant circuit, a decoupling filter circuit, a triode Q1, a power sharing circuit and an operation holding circuit. Wherein, the bias connection terminal is used for electrically connecting with the output terminal of a power amplifier, and the bias circuit is used for providing static working current to the power amplifier. The DC power connection end is used for inputting a DC power supply. The self-resonant circuit is respectively connected to the second pole connection and the bias connection terminal of the triode Q1. The self-resonant circuit is used to curb the reverse flow of the AC signal output by the power amplifier,...

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PUM

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Abstract

The invention discloses a bias circuit for a power amplifier, the bias circuit is used for providing static working current for the power amplifier, and the bias circuit comprises a bias connection end, a direct current power supply connection end, a self-resonance circuit, a decoupling filter circuit, a triode Q1, a power sharing circuit and a work holding circuit. The self-resonance circuit is used for restraining backflow of alternating current signals output by the power amplifier and preventing leakage of high-frequency signal energy. The decoupling filter circuit is used for reducing the Q value of the self-resonance circuit. The power sharing circuit is used for sharing output power of the DC power supply. The work holding circuit is used for guaranteeing stable work of the triode Q1, and then stable static working current is provided for the power amplifier. Due to the fact that the ultra-wideband biasing circuit is achieved through the triode amplifying circuit with the direct-current source, normal working voltage difference can be provided for the power amplifier, excessive device insertion loss cannot be brought to the power amplifier, and the gain of the power amplifier is improved.

Description

technical field [0001] The invention relates to the field of radio frequency / microwave technology, in particular to a bias circuit and a power amplifier for a power amplifier. Background technique [0002] Power amplifiers are widely used in various wireless communication equipment and electronic systems. As an important part of wireless transmitters, power amplifiers must meet strict requirements for various communication indicators. With the promotion of 5G technology, the frequency bandwidth of power amplifiers has begun to receive close attention, and people are keen to design ultra-wideband power amplifiers with good performance. However, the performance of a power amplifier depends on the design of the bias circuit. The power amplifier needs to obtain energy from the DC power supply through the bias circuit to amplify the input signal. Therefore, the bias circuit becomes a key link in the design of the ultra-wide power amplifier. In the ultra-wideband power amplifier...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/48H03F3/195H03F3/213H03F3/22
CPCH03F1/48H03F3/195H03F3/213H03F3/22H03F2200/451
Inventor 王彦熊林江马兴望
Owner SHENZHEN CITY SIGLENT TECH
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