Low Noise Amplifier Circuit Diagram. Amplifier input noise density and gain bandwidth product were measured to be 1 5nv rthz and 157mhz respectively while consuming only 100mw. Linear technology analog devices app note mar 22 2010.

Here is one example of such design. The output impedance is 70 ω at 23 5 db gain and with r3 220kω the input impedance is 30kω. This is a low noise and distortion pre amplifier and tone control circuit in one module.

The ic1 is tl072 op amp acts as the low noise signal amplifier.

By simplifying the design of a circuit we can minimize the noise especially if we can push the number of components to the lowest count. The signal out of ic1 at pin 1. See also subwoofer booster circuit. Distorsions are 0 045 the noise level is 65db at 15mv output voltage.