2results about How to "Improve phase detection accuracy" patented technology

The application is suitable for the field of radio frequency technology, and particularly relates to a phase comparison circuit and a radio frequency chip. The phase comparison circuit comprises a first amplifier, a second amplifier, a first frequency divider, a second frequency divider, a first Schmitt trigger, a second Schmitt trigger, a first flip-flop, a second flip-flop, an AND gate unit, a first filter unit and a second filter unit; an input end of the first amplifier is used for receiving a first radio frequency signal, an output end of the first amplifier is connected with an input end of the first frequency divider, an input end of the second amplifier is used for receiving a second radio frequency signal, and an output end of the second amplifier is connected with an input end of the second frequency divider; the first frequency divider and the second frequency divider are respectively used for reducing the frequency of the amplified first radio frequency signal and the amplified second radio frequency signal; compared with the prior art, the phase comparison circuit provided by the application has the advantages of simple structure, wide phase detection range, stable output and the ability to effectively reduce the complexity of radio frequency front-end power control.

The present application relates to servo motor production test technical field, especially relates to a kind of encoder detection method, device and storage medium, the method comprises: establishing the design requirement parameter library stored according to motor model;Connecting motor to be detected and calling corresponding preset design index;Control motor low-speed no-load rotation;Based on the same hardware timer, encoder A / B / Z signal and hall U / V / W signal are synchronously collected, and synchronous timing data is generated;Synchronous timing data is judged effectively;Actual encoder line number, actual electrical phase and actual hall phase are calculated;Actual parameter is compared with preset design index item by item, all satisfy when judging qualified, any item does not satisfy when judging unqualified and recording deviation.The present application can improve servo motor encoder detection efficiency and phase determination accuracy, adapt to multi-model mixed-line production, and realize detection process traceability.