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Amplification device

A technique for amplifying devices and amplifiers, which is applied to components of amplifying devices, amplifiers, power amplifiers, etc., can solve the problems of unstable changes in characteristics of temperature changes, different specifications of multiple power amplifiers, etc., and achieve the suppression of changes. unstable effect

Pending Publication Date: 2022-03-01
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specifications of a plurality of power amplifiers are often different, and if a bias current having the same temperature characteristic is supplied to each power amplifier, in an amplifier having a plurality of power amplifiers, there may be a change in the characteristic with respect to temperature change. become unstable

Method used

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  • Amplification device
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Experimental program
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Embodiment approach

[0090] [1. Outline structure of amplifier]

[0091] refer to Figure 2 to Figure 5 A schematic configuration of the amplification device according to the embodiment will be described.

[0092] figure 2 It is a schematic structural block diagram of the amplification device 1 according to the embodiment.

[0093] The amplification device 1 includes an amplifier 10 that amplifies a high-frequency signal, and a bias circuit 20 that supplies a bias current to the amplifier 10 . The amplifier 10 is composed of a first IC chip, and the bias circuit 20 is composed of a second IC chip different from the first IC chip. In addition, a bias branch portion BB to be described later is provided on the first IC chip.

[0094] The amplifying device 1 is built in, for example, a communication device that transmits and receives high-frequency signals. As the high-frequency signal input to the amplifying device 1 , for example, a high-frequency signal in the 2.4 GHz band or the 5 GHz band u...

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Abstract

Provided is an amplification device capable of suppressing instability of a change in characteristics with respect to a temperature change. An amplification device (1) is provided with: an amplifier (10) including a plurality of stages of power amplifiers (PA1-PA3) connected in cascade; and a bias circuit (20) that supplies a bias current to the amplifier (10). The bias current (Ib1) supplied to the primary power amplifier (PA1) among the plurality of stages of power amplifiers (PA1-PA3) has a positive temperature characteristic, and the bias current (Ib3) supplied to the final-stage power amplifier (PA3) has a negative temperature characteristic.

Description

technical field [0001] The present invention relates to an amplifying device including an amplifier and a bias circuit. Background technique [0002] Conventionally, there is known an amplifying device that includes: an amplifier including a power amplifier; and a bias circuit that supplies a bias current to the power amplifier. As an example of a bias circuit in such an amplifying device, Patent Document 1 discloses a bias circuit including a current mirror circuit and a current supply circuit for supplying current to the current mirror circuit. The current supply circuit has a temperature compensation circuit. In this bias circuit, for example, when the temperature rises, the bias current is increased by the temperature compensation circuit, and the gain of the bias circuit is suppressed from decreasing extremely. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2013-98904 [0006] For example, when the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/30H03F3/213H03F3/68
CPCH03F1/30H03F3/213H03F3/68H03F2200/447H03F1/302H03F2200/18H03F2200/21H03F2200/42H03F2200/168H03F2200/391H03F2200/408H03F2200/451H03F3/195H03F3/245H03F1/301H03F3/21H03F1/0211
Inventor 大奈路勉德田胜利田部井慎出口和亮河野孝透
Owner MURATA MFG CO LTD