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Bias circuit for semiconductor amplifier and semiconductor amplifier device

A technology of bias circuit and amplifying device, which can be applied to amplifiers with semiconductor devices/discharge tubes, parts of amplifying devices, amplifiers, etc., and can solve problems such as decreased efficiency

Active Publication Date: 2019-04-05
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, if a bias circuit is provided between the output matching circuit and the external load, the load impedance of the second-order harmonic viewed from the output end of the package becomes 50Ω or less, and the efficiency may decrease.

Method used

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  • Bias circuit for semiconductor amplifier and semiconductor amplifier device
  • Bias circuit for semiconductor amplifier and semiconductor amplifier device
  • Bias circuit for semiconductor amplifier and semiconductor amplifier device

Examples

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Embodiment Construction

[0024] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0025] Figure 1A It is a circuit diagram of the semiconductor amplifier device related to the first embodiment, Figure 1B It is a circuit diagram of the power supply branch of the external bias circuit.

[0026] The semiconductor amplifier device has a semiconductor amplifier 11 and a bias circuit 34 housed in a package.

[0027] Furthermore, the semiconductor amplifier 11 housed in the package has a semiconductor amplifier element 14 , an input matching circuit 12 and an output matching circuit 20 . The bias circuit 34 shown in FIG. 1 is connected between the output terminal 19 of the package and an external load 50 .

[0028] In the case where the bias circuit 34 is connected between the semiconductor amplifier 11 housed in the package and the external load 50, if the characteristic impedance ZC4 of the first transmission line 40 of the bias circuit 34 and the res...

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PUM

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Abstract

The bias circuit for a semiconductor amplifier is provided between the output matching circuit of the semiconductor amplifier element and an external load. The bias circuit for a semiconductor amplifier includes a first transmission line, a ground capacitor, a second transmission line, and a power supply terminal. The first transmission line is connected to the output end of the output matching circuit and the external load, respectively. One end of the second transmission line is connected to the first transmission line, the other end is connected to a ground capacitor, and the electrical length at the center frequency of the frequency band is about 90°. One end of the second transmission line is connected to the first transmission line at a position separated by about 45° in electrical length from the output end. The power supply terminal is connected to the connection point between the ground capacitor and the other end of the second transmission line.

Description

[0001] Citations for Associated Applications [0002] This application claims priority based on the prior Japanese Patent Application No. 2014-222927 filed on October 31, 2014, the entire content of which is incorporated herein by reference. technical field [0003] The present invention relates to a bias circuit for a semiconductor amplifier and a semiconductor amplifier. Background technique [0004] In microwaves, high-efficiency operation can be performed if the load impedance of the second-order harmonic viewed from the output electrode terminal of the semiconductor amplifying element is near an open circuit. [0005] There is a technique in which the load impedance of the second-order harmonic observed from the output electrode terminal of the semiconductor amplifier element is near an open circuit. In this case, for example, it is assumed that the load impedance of the second-order harmonic viewed from the output end of the package is about 50Ω or more. About 50Ω me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/02
CPCH03F1/565H03F2200/222H03F2200/387H03F3/193H03F2200/555H03F1/0205H03F1/56
Inventor 高木一考
Owner KK TOSHIBA