Minimum output noise/reduced output power circuit using LM4910

As shown in the figure, this is the minimum output noise/output power reduction circuit of LM4910. The main measures to reduce output noise are: connect a resistor Rseries in series between the output end and the load to attenuate the output noise to achieve the purpose of reducing noise; connect a high-frequency bypass capacitor Cf in parallel across the feedback resistor Rf to suppress high-frequency noise. J1 is a short jumper. When the J1 short jumper is grounded, the amplifier is in shutdown mode and power consumption is reduced to a minimum; when the J1 short jumper is disconnected (VDD high level), the amplifier is in working mode and its power consumption PDMAX=4VDD2/π2RL.