Power amplifier and method for limiting current in power amplifier

According to an embodiment of the present invention, a power amplifier includes: an amplification unit which amplifies an input signal; a sensing unit which varies a resistance value; and a biasing unit which provides a current to the amplification unit and biases the amplification unit. The sensing...

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Bibliographic Details
Main Authors CHOI, JAE HYOUCK, YOON HO KWON, HA, JONG OK, IIZUKA SHINICHI, LEE, KWANG DU, HONG, KYUNG HEE, KANG SUK CHAN
Format Patent
LanguageEnglish
Korean
Published 09.11.2016
Subjects
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
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Summary:According to an embodiment of the present invention, a power amplifier includes: an amplification unit which amplifies an input signal; a sensing unit which varies a resistance value; and a biasing unit which provides a current to the amplification unit and biases the amplification unit. The sensing unit varies the current provided to the amplification unit by the biasing unit based on a bias of the amplification unit to reduce the occurrence frequency of an overcurrent. 본 발명의 일 실시 예에 따른 전력 증폭기는, 입력 신호를 증폭시키는 증폭부; 저항값이 변하는 센싱부; 및 증폭부에 전류를 제공하여 바이어싱(biasing)하는 바이어싱부; 를 포함하고, 센싱부는 증폭부의 바이어스에 기초하여 바이어싱부에 의해 증폭부에 제공되는 전류를 변경시킴으로써, 과전류의 발생빈도를 줄일 수 있다.
Bibliography:Application Number: KR20150061419