| 摘要 |
The present invention relates to the field of electrical and electronic engineering, and provides a polarity-based rectifying and filtering method. Compared with the traditional rectifier and filter circuits, the method divides an alternating current sinusoidal wave into a positive half wave and a negative half wave, respectively rectifies and filters the positive and negative half waves, and then merges and outputs a direct current signal. The method relates to various rectifier and filter circuits and methods that convert an alternating current electric signal to a direct current signal, and can significantly reduce switching noise and high-order harmonic interference due to rectifier diodes and improve a signal-to-noise ratio of a rectified direct current power source. In addition, the method effectively reduces interference from rectifier circuit noise on an operational circuit or a power grid, has a simple and feasible circuit design, and greatly reduces self-interference in the existing rectifier circuits at a low manufacturing cost, thus improving current rectifying quality, efficiency and stability. The method can be applied to the fields with high sensitivity to the power source noise, such as the small signal field, precision instrument field, high-precision control and measurement field, and also to the industrial high power direct current power supply field. |
