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Amplifier and radio frequency power amplifier using the same

An amplifier and operational amplifier technology, applied in power amplifiers, improving amplifiers to improve efficiency, amplifiers, etc., can solve problems such as clipping distortion of envelope amplifiers, and achieve the effect of avoiding clipping distortion, high efficiency, and low distortion

Inactive Publication Date: 2005-03-09
RENESAS ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual circuit operation, because the output voltage of the class B amplifier cannot exceed the power supply voltage, the envelope amplifier 103 clips and distorts under large signal peaks

Method used

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  • Amplifier and radio frequency power amplifier using the same
  • Amplifier and radio frequency power amplifier using the same
  • Amplifier and radio frequency power amplifier using the same

Examples

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Embodiment Construction

[0037] Hereinafter, the amplifier of the present invention and the high-frequency power amplifier using it will be further described in detail with reference to the illustrated embodiments of the invention. and then, figure 1 , Figure 3 ~ Figure 5 as well as Figure 7 ~ Figure 10 The same symbol in means the same or the like.

[0038] figure 1 Embodiment 1 of the amplifier of the present invention is shown. exist figure 1 Among them, 1 is a low-pass filter that removes the high-frequency component of the envelope component of the input signal input to the input terminal 5, 2 is a DC / DC converter that amplifies the output signal of the low-pass filter 1, and 3 is amplifying The class B amplifier 4 is a high-pass filter for removing the low frequency components of the class B amplifier 3 from the envelope component input terminal 5 . The DC / DC converter 2 has two output terminals, one of which is connected to the output terminal 6 of the amplifier, and the other is con...

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PUM

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Abstract

An amplifier using a wide band, high efficiency, and low distortion amplifier free from clipping distortion, and a high efficiency and low distortion radio frequency power amplifier, using that amplifier, which can be applied to wide band wireless communication systems are provided. The amplifier has a DC-DC converter 2, augmented with a low pass filter 4, for amplifying the low frequency components of an input signal from a terminal 5, and a class B amplifier, augmented with a high pass filter, for amplifying the input signal and supplying its high frequency components after amplification. The DC-DC converter and the class B amplifier are connected in parallel, and the power supply voltage of the class B amplifier is controlled with the low frequency components of the input signal.

Description

technical field [0001] The present invention relates to a high-frequency power amplifier, in particular to a suitable high-frequency power amplifier suitable for transmitting units of wireless devices such as mobile phones. Background technique [0002] In recent years, the rapid popularization of mobile phones has increased the amount of communication data. Therefore, large-capacity communication methods such as W-CDMA (Wideband code division multiple access) have been introduced. [0003] The high-frequency power amplifier used in the transmission unit of the mobile phone terminal consumes a lot of power among the terminal components, and it is important to increase its efficiency in order to increase the battery life. In addition, in order to use it in a large-capacity communication system such as W-CDMA, it is necessary to make it low in distortion in addition to high efficiency. [0004] However, high efficiency and low distortion cannot be simultaneously achieved in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/20H03F1/02H03F1/32H03F3/19H03F3/38H04B1/04
CPCH03F2200/432H03F1/0227
Inventor 松本秀俊田上知纪大西正己
Owner RENESAS ELECTRONICS CORP
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