摘要
为了提高音频播放质量,设计了一款高品质耳机功率放大器,该设计主要由电源电路、一级放大电路和二级放大电路组成.电源由两节电池构成,并使用四个电解电容进行滤波.放大电路采用OPA2604进行设计,一级放大电路使用OPA2604的A通道,二级放大电路则使用OPA2604的B通道.手机或电脑输出模拟音频信号,通过3.5 mm耳机线输入至一级放大电路进行放大,放大后的信号再输入二级放大电路进行放大,最后通过3.5 mm耳机接口将放大后的音频信号传入耳机发声.
In order to improve the quality of audio playback,a high-quality headphone power amplifier is designed,which is mainly composed of power supply circuit,primary amplifier circuit and secondary amplifier circuit.The power supply consists of two batteries and uses four electrolytic capacitors for filtering.The amplifier circuit is designed with OPA2604.The first stage amplifier uses channel A of OPA2604,and the second stage amplifier uses channel B of OPA2604.The mobile phone or computer outputs analog audio signal,which will input into the primary amplifier circuit through a 3.5 mm headphone cable for amplification.The amplified signal is then input into the secondary amplifier circuit for amplification.Finally,the amplified audio signal is transmitted to the headset for sound generation through the 3.5 mm headphone interface.
作者
李昊
郝保明
胡遵阳
LI Hao;HAO Bao-ming;HU Zun-yang(School of Mechanical and Electrical Engineering, Suzhou University,Suzhou 234000,China)
出处
《西安文理学院学报（自然科学版）》
2021年第1期46-51,共6页
Journal of Xi’an University(Natural Science Edition)
基金
宿州学院科研平台开放课题项目(2019ykf27)。
关键词
放大器
耳机
模拟信号
amplifier
headphone
analog signal
