回覆 36# waltyuen
Yes. I/V is better to use FET opamp. If DAC output is current (not voltage), signal is small. It needs a high input impedance amplifier such as FET to convert it to voltage output. And bandwidth here is very important (slew rate is less important because signal is small). High bandwidth FET is preferred.
BJT input impedance is not very big. Hence signal loss will be big. The high S/N of AK4499 will be wasted. |