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Circuit structure capable of increasing linearity and power added efficiency of power amplifier

A power-added efficiency and power-increasing technology, applied in the direction of improving amplifiers to increase efficiency and improving amplifiers to reduce nonlinear distortion, etc. The effect of additional efficiency

Active Publication Date: 2010-11-17
厦门英诺迅科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the envelope elimination and recovery technology can improve the linearity of the power amplifier without affecting the efficiency of the power amplifier, the circuit structure used in this technology is very complicated, does not use the circuit design, and increases the cost of circuit manufacturing

Method used

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  • Circuit structure capable of increasing linearity and power added efficiency of power amplifier
  • Circuit structure capable of increasing linearity and power added efficiency of power amplifier
  • Circuit structure capable of increasing linearity and power added efficiency of power amplifier

Examples

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Embodiment

[0024] Example: such as figure 1 and figure 2 As shown, this embodiment is a Cascode power amplifier circuit, the Cascode power amplifier includes an input transistor Q1 and an output transistor Q2, the base of the input transistor Q1 is connected to the input port of the power amplifier, and the input port and the input transistor A first capacitor C1 is also connected between the bases, the emitter of the input transistor Q1 is grounded, and the collector is connected in series with the emitter of the output transistor Q2. The base of the output transistor Q2 is connected to the input end of the second harmonic parallel resonant network, and the output end of the second harmonic parallel resonant network is grounded; the collector of the output transistor Q2 passes through the second and third harmonics in turn. After the resonant network and the output matching network are connected with the output port of the power amplifier.

[0025] The second harmonic parallel resona...

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PUM

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Abstract

The invention discloses a circuit structure capable of increasing the linearity and power added efficiency of a power amplifier. The power amplifier is provided with an input transistor and an output transistor which are in cascode to form the power amplifier with the Cascode structure; a second harmonic series resonant network used for inhibiting the output of second harmonic signals is connected between the collector of the output transistor and the ground; and a third harmonic parallel resonant network used for reflecting the third harmonic signals back to the collector is connected between the collector of the output transistor and an output matching network. The second harmonic series resonant network and the third harmonic parallel resonant network can both be used to increase the linearity and power added efficiency of the power amplifier with the common structure. The base of the output transistor is connected with a second harmonic parallel resonant network composed of a fundamental wave series resonant network and a capacitor. The resonant networks can be used to control harmonic signals, thus inhibiting the output of harmonic signals and increasing the linearity and power added efficiency of the power amplifier.

Description

technical field [0001] The invention relates to a circuit structure for improving the linearity and power-added efficiency of a power amplifier. Background technique [0002] Power amplifiers are a key component in wireless communication systems, and their linearity and efficiency have always been the focus of attention. With the development of the third generation mobile communication system (such as WCDMA, CDMA2000), the linear modulation technology is more and more widely used. The linearity of the power amplifier plays a crucial role in the ability of the communication system to transmit the amplified data signal without distortion. The better the linearity of the power amplifier, the less likely the signal waveform amplified by the amplifier is to be distorted and distorted, so that the input data signal is ideally amplified and output. In addition, the efficiency of the power amplifier is also the focus of another study. The energy consumption of the power amplifier...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/32H03F1/02
Inventor 高怀张晓东胡善文郭瑜滑育楠
Owner 厦门英诺迅科技有限公司
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