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Amplifier and wireless communication device

A technology of amplifiers and amplifier circuits, applied in amplifiers, power amplifiers, gated amplifiers, etc., can solve problems such as increased power loss

Active Publication Date: 2014-08-13
SOCIONEXT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As described above, in a conventional power amplifier with a power mode switching function, non-operating transistors are directly connected to operating circuit paths, and power loss increases due to non-operating transistors

Method used

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  • Amplifier and wireless communication device
  • Amplifier and wireless communication device
  • Amplifier and wireless communication device

Examples

Experimental program
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Embodiment Construction

[0021] Hereinafter, the embodiments will be described based on the drawings.

[0022] figure 1 is a diagram depicting a configuration example of a power amplifier as an amplifier in one embodiment. The power amplifier in this embodiment has a power mode conversion function, and the power amplifier is provided with an amplifier circuit unit 101 for a high power mode and an amplifier circuit unit 102 for a low power mode in parallel between the input Pin and the output Pout . The power amplifier in the present embodiment includes a differential circuit and each of the amplifier circuit units 101, 102 has a two-stage amplifier configuration.

[0023] The amplifier circuit unit 101 for the high power mode can output a signal with the maximum output power of the power amplifier. The amplifier circuit unit 102 for the low power mode cannot output a signal with the maximum output power of the power amplifier, but the amplifier circuit unit 102 has higher amplification efficiency ...

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Abstract

The invention relates to an amplifier and a wireless communication device. In a power amplifier including an amplifier circuit unit for high power mode and an amplifier circuit unit for low power mode provided in parallel thereto between input and output of the amplifier and where, when one amplifier circuit unit is in an operating state, the other amplifier circuit unit is in a non-operating state, a cross-coupled capacitor is provided between a drain of one of two transistors in output side and a gate of the other transistor in the amplifier circuit unit for high power mode, and a series circuit where a switch and a capacitor are coupled in series is coupled between a drain of the transistor of output side in the amplifier circuit unit for low power mode and a ground, the switch being in a conducting state in high power mode operation and being in a non-conducting state in low power mode operation.

Description

technical field [0001] Embodiments discussed herein relate to amplifiers and wireless communication devices. Background technique [0002] Portable wireless communication devices such as mobile phones and mobile communication terminals can have a longer operating time by operating batteries due to reduced average consumption current. The average consumption current is obtained by multiplying the consumption current per output power of radio waves output from the wireless communication device via the antenna by the actual frequency used. exist Figure 7A The usage frequency distribution of DG09 (total index of usage frequency) is depicted in . from Figure 7A It is found that the use frequency is higher at the output power near 0dBm (which is low output power), and in order to reduce the average current consumption, it is important to reduce the current near 0dBm. [0003] like Figure 7B As shown, the amplification efficiency of the power amplifier reaches the maximum at ...

Claims

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Application Information

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IPC IPC(8): H03F3/20
CPCH03F3/211H03F1/0277H03F3/45179H03F3/72H03F2203/45614H03F2203/7233
Inventor 佐藤知明山浦新司
Owner SOCIONEXT INC