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China's first integrated operational amplifier
The first integrated operational amplifier in China is the "No.1 amplifier" developed by Institute of Electronics, Chinese Academy of Sciences 1965, also known as "YF- 1" or "YF- 1 amplifier". It is the first integrated circuit product independently developed in China and the first integrated operational amplifier in China. This integrated operational amplifier has excellent characteristics such as high gain, low offset voltage and low input bias current, which has laid the history of independent research and development of integrated circuits in China.