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Radio-frequency CASCODE structure power amplifier with improved linearity and power added efficiency

A power-added efficiency and power amplifier technology, applied in high-frequency amplifiers, improved amplifiers to reduce nonlinear distortion, energy-saving ICT, etc., can solve the problems of increasing circuit complexity and high operating frequency, achieving simple structure and improving gain-bandwidth product , the effect of saving chip area and production cost

Inactive Publication Date: 2010-11-10
SUZHOU INNOTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The predistortion method has a simple circuit, high operating frequency, and unconditional stability. It is suitable for any modulation signal and is an ideal linearization technology, but it often increases the complexity of the circuit.

Method used

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  • Radio-frequency CASCODE structure power amplifier with improved linearity and power added efficiency
  • Radio-frequency CASCODE structure power amplifier with improved linearity and power added efficiency
  • Radio-frequency CASCODE structure power amplifier with improved linearity and power added efficiency

Examples

Experimental program
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Embodiment

[0024] Example: such as figure 1 Shown is a circuit structure diagram of a general Cascode structure power amplifier in the prior art, including a Cascode structure 2 composed of a common-emitter input transistor Q1 and a common-base output transistor Q2, from the signal input port of the power amplifier to the input The input matching network 1 connected between the bases of the transistor Q1 and the output matching network 3 connected between the collector of the output transistor Q2 and the signal output port of the power amplifier. The input matching network 1 is composed of a first capacitor C1 and an input matching circuit, and the output matching network 3 is composed of a second capacitor C2 and an output matching circuit. The input signal reaches the base of the input transistor Q1 through the first capacitor C1 and the input matching circuit, the emitter of the input transistor Q1 is grounded, the collector is connected to the emitter of the output transistor Q2, and...

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Abstract

The invention disclose a radio-frequency Cascode structure power amplifier with improved linearity and power added efficiency, comprising a Cascode structure comprising a common-emitter input transistor and a common-base output transistor, an input matching network connected from a signal input port of the power amplifier and a base of the input transistor, and an output matching network connected from a collector of the output transistor to the signal output port of the power amplifier. The base of the output transistor is connected with an RLC series-parallel resonant network capable of improving the gain of a baseband signal and restraining input of a secondary harmonic signal. The radio-frequency Cascode structure power amplifier obviously improves the linearity and power added efficiency of the CASCODE structure power amplifier without increasing the static power consumption of the power amplifier by means of increasing the baseband gain and restraining the harmonic signal by the RLC series-parallel resonant network; and the radio-frequency Cascode structure power amplifier effectively increases the gain bandwidth product of the Cascode structure wideband power amplifier.

Description

technical field [0001] The invention relates to a radio frequency Cascode (cascode) structure power amplifier with high linearity and high power added efficiency, which belongs to the technical field of radio frequency integrated circuits. Background technique [0002] A typical wireless transmitting device uses a radio frequency (RF) power amplifier to amplify the signal transmitted through the antenna. It amplifies the modulated frequency band signal to the required power. In order to ensure that the receiver in the coverage area can receive a satisfactory signal level, but not interfere too much with the adjacent channel communication, it is necessary to improve the linearity of the power amplifier as much as possible. At the same time, in order to improve the energy utilization rate of the transmission system and reduce the volume of communication equipment, it is also necessary to use high-efficiency power amplifiers. However, the signal of a high-efficiency power ampl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/189H03F1/32
CPCY02B60/50
Inventor 高怀张晓东胡善文程华孙晓红
Owner SUZHOU INNOTION TECH
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