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Impedance compensation circuit and power amplification compensation circuit

A technology of impedance compensation and power amplification, applied in the field of impedance compensation circuit and power amplification compensation circuit, which can solve the problems of high diode impedance and poor loop stability, etc.

Active Publication Date: 2018-11-27
GUANGZHOU HUIZHI MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the bias current provided by the input terminal of the RF power amplifier PA is small, the impedance of the diode connected to the input terminal of the RF power amplifier PA is relatively high, so its corresponding pole is closer to the main pole of the loop, resulting in poor loop stability

Method used

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  • Impedance compensation circuit and power amplification compensation circuit
  • Impedance compensation circuit and power amplification compensation circuit
  • Impedance compensation circuit and power amplification compensation circuit

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Embodiment Construction

[0027] The technical solutions of the present invention will be further elaborated below with reference to the accompanying drawings and specific embodiments of the description.

[0028] In the embodiments of the present application, for the sake of brevity, the radio frequency power amplifier is collectively referred to as a power amplifier for short. Among them, the way to realize the GSM radio frequency power amplification mainly includes the current control mode.

[0029] figure 1 It is a schematic diagram of the composition and structure of a power amplifier circuit in a current control mode. The current control mode refers to realizing power control by controlling the bias current ICC of the power amplifier. like figure 1 As shown, the power amplifier circuit mainly includes an error amplifier EA, a P-channel field effect (PMOS) transistor MP, a power amplifier PA, a first diode D1, a second diode D2, a load capacitor CL, a compensation capacitor Cc and a sampling resi...

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Abstract

An impedance compensation circuit comprises an impedance adjusting circuit and a bias circuit connected with the impedance adjusting circuit, the bias circuit is configured to provide a bias voltage to the impedance adjustment circuit, the impedance adjustment circuit includes a first node for connection to a radio frequency input signal terminal of a power amplifier and a second node for connection to the bias circuit, The voltage at the second node is the bias voltage, and the impedance compensation circuit is in a first operating state at a high frequency and a second operating state at a low frequency, wherein the impedance of the impedance compensation circuit in the first operating state is lower than the impedance of the impedance compensation circuit in the second operating state.The invention also discloses a power amplification compensation circuit with the impedance compensation circuit.

Description

technical field [0001] The invention relates to a power amplifier circuit, in particular to an impedance compensation circuit and a power amplifier compensation circuit with the impedance compensation circuit. Background technique [0002] The RF power amplifier is an important part of various wireless transmitters. The RF signal generated by the front-end circuit of the transmitter is very small. Usually, the RF power amplifier needs to be used to obtain enough RF output power to feed the RF signal to the antenna. radiated by the antenna. [0003] The RF indicators of GSM RF power amplifiers need to meet the 3rd Generation Partnership Project (3GPP) agreement, and usually include GSM RF power amplifiers with different output power ranges, such as GSM850 and GSM900 frequency bands. The output power range of the GSM RF power amplifier is 33dBm ~ 5dBm , The output range of the GSM radio frequency power amplifier of the digital cellular system and the personal communication se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/193H03F1/56H04B1/04
CPCH03F1/56H03F3/193H04B1/04H04B2001/0416Y02D30/70
Inventor 苏强彭振飞司翠英
Owner GUANGZHOU HUIZHI MICROELECTRONICS