The clamping circuitry comprising D1, D2, and RT1 offers higher off-isolation between the output and the input of the op amp than that of the single diode, D3.

• 由D1、D2和RT1组成的箝位电路，与单二极管D3相比，为运放的输出和输入之间提供了更高的截止状态隔离度。