low-noise preamplifier circuit of OPA37

Published:2011/7/1 0:53:00 Author:chopper | Keyword: low-noise, preamplifier circuit | From:SeekIC

The picture shows the low-noise preamplifier of OPA37. The input signal is applied to OPA37 inverting input (pin 3). RL,CL in the circuit are the load impedances of the electromagnetic pick-up,and their resistances and capacities follow the characteristics of the pick-up(Generally they are based on the recommended parameters ). The all resistors should adopt metal film resistors (1% accuracy), and their capacitors should use organic film capacitors. When the input signal is 1kHz, its gain will be about 100 times.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Amplifier_Circuit/Amplifier_Circuits-Audio/low_noise_preamplifier_circuit_of_OPA37.html

Print this Page | Comments | Reading(3)