A high voltage analog switch can be used in medical ultrasound applications. The high voltage analog switch can pass high voltage transducer excitation signals without necessarily having any high voltage power supplies. The high voltage analog switch can include three output switches, with one of the output switches having a clamp circuit for ensuring that transistors of an output switch on an input end of the high voltage analog switch remain OFF when the high voltage analog switch is OFF. The high voltage analog switch has a simple configuration with no requirement of high power supply, and thus is cost effective with improved reliability.提出了一種可用於超聲醫療設備的高電壓類比開關。該高電壓類比開關無需高電壓電源便可使高電壓換能器激勵信號通過或者阻斷。高電壓類比開關可包括三個輸出開關,其中一個輸出開關含有箝位電路,以確保當高電壓類比開關斷開時,位於高電壓類比開關輸入端的一個輸出開關中的電晶體處於截止狀態。該高電壓類比開關結構簡單,無需高電壓電源進行供電,降低了生產成本,提高了設備的安全性。102‧‧‧高電壓類比開關401‧‧‧箝位閘極驅動電路402‧‧‧輸出開關403‧‧‧輸出開關404‧‧‧輸出開關405‧‧‧閘極驅動電路406‧‧‧閘極驅動電路407‧‧‧閘極驅動電路
