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Electronic system, radio frequency power amplifier and temperature compensation method thereof

A radio frequency power and amplifier technology, applied in the field of radio frequency power amplifiers with temperature compensation, can solve the problems of non-compliance with the requirements of characteristics, affecting the output power of radio frequency power amplifiers, etc., and achieve the effect of stable and high linearity

Active Publication Date: 2016-09-21
UNIVERSAL SCIENTIFIC INDUSTRIAL (SHANGHAI) CO LTD +1
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Problems solved by technology

exist Figure 2C Among them, the ordinate represents the output current IC', and the output current IC' decreases with the rise of temperature, which greatly affects the output power of the existing RF power amplifier 100, which may not meet the requirements of current communication systems for power amplifiers operating in high and low temperature environments. time characteristic requirements

Method used

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  • Electronic system, radio frequency power amplifier and temperature compensation method thereof
  • Electronic system, radio frequency power amplifier and temperature compensation method thereof
  • Electronic system, radio frequency power amplifier and temperature compensation method thereof

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Embodiment Construction

[0064] Various exemplary embodiments will be described more fully hereinafter with reference to the accompanying drawings, in which some exemplary embodiments are shown. However, inventive concepts may be embodied in many different forms and should not be construed as limited to the illustrative embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Similar numbers always indicate similar elements.

[0065] It will be understood that, although the terms first, second, third etc. may be used herein to describe various elements, these various elements should not be limited by these terms. These terms are used to distinguish one element from another. Thus, a first element discussed below could be termed a second eleme...

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Abstract

The invention discloses an electronic system, a radiofrequency power amplifier and a temperature compensation method of the radiofrequency power amplifier. The radiofrequency amplifier comprises a bias voltage current generating unit, a first impedance unit, a second impedance unit, a third impedance unit and an output level unit. The bias voltage current generating unit receives a reference voltage; a first voltage with a negative temperature coefficient exists between the first impedance unit and the second impedance unit and the second impedance unit receives a grounding current; a voltage exists between the third impedance unit and the second impedance unit and the second voltage is a partial voltage of the first voltage. The bias voltage current generating unit outputs a bias voltage current with a positive temperature coefficient according to the second voltage. The output level unit receives the input current; the bias voltage current is equal to the sum of the input current and the grounding current and the input current has the characteristic of the positive temperature coefficient.

Description

technical field [0001] The present invention relates to a radio frequency power amplifier, and in particular to a radio frequency power amplifier with temperature compensation. Background technique [0002] In wireless communication handheld devices, the main DC power consumption comes from the RF power amplifier. Therefore, making the RF power amplifier not only have high linearity without distorting the amplified signal, but also have high efficiency to prolong the communication time has always been the research focus of RF power amplifier design. In particular, the widely used orthogonal frequency division multiplexing (OFDM) digital modulation technology in wireless communication systems has obvious time-varying wave packet characteristics, and its peak-to-average power ratio constant (PAPR) is much higher than that of existing wireless communication systems. In other words, its wave packet changes drastically with time, so the linearity requirements for RF power amplif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/30H03F3/189H03F3/20
Inventor 丁兆明李菘茂李威弦
Owner UNIVERSAL SCIENTIFIC INDUSTRIAL (SHANGHAI) CO LTD
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