Synchro to Digital Converters or Resolver to Digital Converters (HSDC/HRDC1746 Series) are designed on the principle of type II servo tracking principle and adopts differential isolation input, the data output adopts three-state latch mode, it is suitable for analog signal/digital signal conversion of three-wire synchro and four-wire resolver. With fast conversion speed and stable and reliable performance, this device can be widely applied in angle measurement and automatic control system.