Pseudo resistance correction circuit based on switched capacitor

The invention relates to the technical field of analog integrated circuits, and discloses a pseudo resistance correction circuit based on a switched capacitor, a reference resistor is generated through a switched capacitor correction circuit, and the resistance value of the reference resistor is only related to the capacitance value of the switched capacitor and the frequency of a switch. A parallel-to-series circuit design scheme and a voltage integrator are used for extracting control voltage to control the pseudo resistor, the pseudo resistor with the resistance value being XYZ times of that of a reference resistor can be obtained, the resistance value of the pseudo resistor is accurate and adjustable, the robustness to PVT fluctuation is good, and the linearity is improved compared with that of a traditional pseudo resistor. 本发明涉及模拟集成电路技术领域，公开了一种基于开关电容的伪电阻矫正电路，通过开关电容矫正电路产生一基准电阻，其阻值大小仅与开关电容的电容值和开关的频率有关，使用并联转串联的电路设计方案以及电压积分器将控制电压提取来控制伪电阻，可以得到阻值为基准电阻XYZ倍的伪电阻，该伪电阻阻值精确可调，对PVT波动的鲁棒性好，线性度相比传统伪电阻有提高。