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Debug an amplifier and peak detecter circuit using op-Amps

Hello I designed an audio detector circuit using an opamp, followed by a peak detector stage (also opamp). Right now my circuit is not working well, I need a hardware engineer who knows a lot about OPAMPS to help me figure out what is wrong. One constraint I have is that I cannot change the circuit configuration or layout since its on a circuit board, I can just change the component values.

I have attached a picture of the schematic. The circuit is already on a PCB so I cant change anything, only the component values. The idea of the circuit is to amplify any audio signal, then send it to a peak detector, then to a micro-controller A/D input. When it detects a sound the micro-controller can trigger something.

The problems are:

1. The output sometimes has a pop, or a glitch, that causes the micro-controller to trigger even when there is no audio input.

2. The circuit is not sensitive enough, (low gain)

3. I can only change component values since the circuit is already on a PCB.

Habilidades: Diseño de circuitos

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Información del empleador:
( 1 comentario ) Pembroke PInes, United States

ID de proyecto: #7874326

20 los freelancers están ofertando un promedio de $128 para este trabajo.

EagleSha

Generally please provide specific task description. Over 12 years of experience in electronics hardware and software design. Proficient in software and hardware design of embedded systems. Successful in planning an Más

$105 USD en 15 días
(14 comentarios)
5.1
dsnejko

Hi, Send me your schematic and explain the problem with more details. Layout picture would be helpful as well if rework needed. I am leaving tomorrow for one week vacation but should come back next Wednesday. I don' Más

$111 USD en 10 días
(2 comentarios)
5.2
loi09dt1

A proposal has not yet been provided

$147 USD en 3 días
(19 comentarios)
5.0
MarcomsNZ

Hi, I am very experienced with using op amps for this sort of design and should be able to review your schematic and your results and come up with answers very quickly. Please send schematic Regards Marc s Más

$83 USD en 2 días
(7 comentarios)
4.6
sagradoamicus

hi bro i can help you with this i have been working with the pcbs since last 4 years i am waiting for your reply to start regards

$106 USD en 1 día
(6 comentarios)
3.8
ElecCirDesign

I have PhD in electronics, I can help you well, but right now I'm busy for couple of days. could you please send the detail of your circuit to have a look?

$444 USD en 7 días
(5 comentarios)
3.8
zarnescugeorge

Hello! Send me a message! I want to help you! Have a nice day! .

$111 USD en 3 días
(5 comentarios)
3.0
DreamCha

Thanks for posting this proposal. I am a leader of team that include several excellent circuit/PCB designers, firmware developers, FPGA/CPLD experts, application developers and so on. - For circuit/PCB design we Más

$250 USD en 5 días
(1 comentario)
2.4
kingch91

Great Project !!, I have seen and understand all your requirements. I have very strong expertise in it although I have a great experience in it, I have intelligence, energy and integrity. Once give me work, I assure yo Más

$100 USD en 3 días
(1 comentario)
1.6
ElectrSoftDesign

Hello.I'm Electrical-Electronic Engineer.I have experience about circuit desiong about embedded power [url removed, login to view] you contact with me .We meet details.

$111 USD en 3 días
(2 comentarios)
2.6
saipanjiguly

Have industrial experience in PCB designing of 1 to 6 layers. Have worked on many embedded projects : coding and hardware designing. Have 4+ years experience in KiCad and EAGLE Cad. Worked on many wireless modules Más

$100 USD en 3 días
(1 comentario)
1.4
cscinstructor

I have read and understand all your requirements Please open chat window to discuss further ------------------------------------------------------------------------------------------------------------------------ Más

$80 USD en 0 días
(2 comentarios)
2.0
fayeembhati

am graduate engineer and i know abt op amp ,please give me detail schematin in eagle or handwriting ckt with full value insallh i i will solve your problem

$35 USD en 1 día
(0 comentarios)
0.0
sapna321

Hello, I am a Hardware and Firmware Developer cum Schematic/PCB Designer, having 9+ years of experience. Expertise in Arduino, AVR, PIC, 8051 programming. PCB/Schematic design expertise in Proteus, Altium, Eagle, Orc Más

$55 USD en 3 días
(0 comentarios)
0.0
diegosoares90ml

I've developed many circuits using OPAmps, like active filters, amplifiers, attenuators, and other applications. I have some experience to support you. Best Regards

$155 USD en 3 días
(0 comentarios)
0.0
betaenergy

Dear Sir, We are Reserach and Development company whose working area are : -Digital Motor Control -Analog Design -Electronic Design -Power Electronics -PCB design -Embedded system -Matlab -Simulation of ha Más

$155 USD en 3 días
(0 comentarios)
0.0
PeterSta

Dear Sirs I'M working since 25 years as a Hardware Designer. I think the circuit will never work. The datasheets of LM 386 shows that OPAMP inputs must be changed "+" input has to be connected to gnd and "-" input h Más

$250 USD en 3 días
(0 comentarios)
0.0
mosaicvw

Hi...b4 you award the bid...dropbox me a link with the schematic. I'll look it over, if it's not a major issue I'll give you the solution right away. You can award the bid if it works out and you're satisfied! Here Más

$155 USD en 3 días
(0 comentarios)
0.0
usman710

Hi I am an electronics engineer Send me the circuit diagram along with model and values for the opamps and components you are using. I can easily help you in this project. Regards USman

$250 USD en 3 días
(0 comentarios)
0.0
viniciogomez

I am a student of electronics engineering and possess extensive knowledge on the subject. I have made circuits of the same type. If you have any questions please contact me.

$40 USD en 3 días
(0 comentarios)
0.0