High-precision RC low-frequency oscillator

The invention discloses a high-precision RC low-frequency oscillator, which belongs to the field of integrated circuit design and comprises a starting module, a self-biasing module and a core module. The starting module is used for driving the self-bias module to get rid of a degenerate bias point when a power supply is powered on; the self-bias module generates bias current irrelevant to power supply voltage and is used for providing bias for the core module; the core module comprises an adjustable resistor Rvar and an adjustable capacitor Cvar, the output frequency is trimmed by changing the resistance value and the capacitance value of the adjustable resistor Rvar and the adjustable capacitor Cvar, and high precision of the output frequency is achieved. The high-precision RC low-frequency oscillator is not influenced by working voltage, and the frequency can be trimmed and adjusted. 本发明公开一种高精度RC低频振荡器，属于集成电路设计领域，包括启动模块、自偏置模块和核心模块。所述启动模块用于电源上电时驱使所述自偏置模块摆脱简并偏置点；所述自偏置模块产生与电源电压无关的偏置电流，用于给核心模块提供偏置；所述核心模块包括可调电阻Rv