摘要
在放大电路中,信噪比是衡量放大器特性的重要参数,噪声抑制的方法和思路贯穿放大电路设计始终。在音频使用场合,放大器的噪声参数影响输出音质,在射频放大电路中,放大器的噪声参数直接影响无线通讯距离,特别是当输入信号幅度小到一定程度时,有用信号几乎被噪声信号覆盖。噪声特性是表征放大器性能优劣的重要参数,研究放大器噪声特性是设计放大器电路和器件的前提基础。
In the amplifier circuit,the signal to noise ratio is a measure of the important parameters of amplifier characteristics,noise reduction methods and ideas has always been through the amplification circuit design,the use of occasions in the audio amplifier output noise parameters affect the sound quality,in the radio frequency amplifier,the amplifier noise parameters from a direct impact on wireless communications,especially when the input signal range of small to a certain degree,the useful signal noise was almost covered with amplifier noise performance is the quality of characterization of key parameters to study the characteristics of amplifier noise amplifier circuit design and based on the premise of the device.
出处
《微处理机》
2010年第2期13-15,共3页
Microprocessors
关键词
噪声
信噪比
最优设计
Noise
The signal to noise ratio
Most superior design
