Hi, all,
Currently I am using a LM675 amplifier to amplify DC-20Hz small signal. The reason why I use LM675 is that I need a large current power amplifier as drive circuit. The schematic diagram is the standard application on the datasheet, and the signal input is a 10Hz, 100mV sin wave. Power supply is +12v DC power. When I increase the frequency to 30 Hz, the signal is pretty good, but when I lower the frequency below 20 Hz, signal is heavily distorted. I see a current source using LM675 on the data sheet, I think this amplifier could work in very low frequency even in DC regime, couldn't it? Thanks a lot!!!!
Currently I am using a LM675 amplifier to amplify DC-20Hz small signal. The reason why I use LM675 is that I need a large current power amplifier as drive circuit. The schematic diagram is the standard application on the datasheet, and the signal input is a 10Hz, 100mV sin wave. Power supply is +12v DC power. When I increase the frequency to 30 Hz, the signal is pretty good, but when I lower the frequency below 20 Hz, signal is heavily distorted. I see a current source using LM675 on the data sheet, I think this amplifier could work in very low frequency even in DC regime, couldn't it? Thanks a lot!!!!