Analoge Super Preamp for Microphone ... Only expert please

Hello, Have a great day. We are startup company offering services to develop the electronic devices. We will ship you fully tested and working hardware. As we guess you need to digitize the sound signal, The ADC Reference voltages are 3.3V and probably 12 bit resolution. We have gone thru such experiments to detect different DB levels of sound with different sources producing sounds. Any ways, Please feel free to contact us. Best Regards, Shahbaz.

Dear Valued Employer, My name is Martin Botsov and I am an engineering physicist with extensive experience in the field of circuit design, circuit prototyping and PCB design. My experience in the audio field covers all areas of circuit design. As I understand from the project description you require a microphone pre amplifier to be designed. So, without further ado here's how the workflow would look like, if you happen to choose me as a partner for your project: 1. Initial discussion 2. Block diagram of proposed solution 3. Schematic drafts based on proposed solution 4. Overview and discussion of schematic drafts 5. Mock-up assembly If you approve, then 6. Component library creation 6.1 Schematic symbol library creation 6.2 Footprint library creation 7. Schematic drawing 8. Layout design 8.1 Components placement and arrangement 8.2 Review of proposed layout design arrangement 8.3 Components routing 8.4 Review of final layout design 9. Design rule check 10. Verification and validation 11. Production files (GERBER, NC DRILL, STEP, BOM, ASM, PICK & PLACE, SCH, 2D mechanical drawing) Your project will be carried out on Altium Designer. Don't hesitate to contact me with questions regarding any details around your project. You could also check out my profile on Freelancer and LinkedIn for more details around my professional experience. I am looking forward to hearing from you soon. Thank you for your time. Kind Regards Martin Botso

Hi, I have been working in the field of embedded system for 2.5+ years. I am interested on this project. Thank you!

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provides high-performance PCB physical design (layout).Our capabilities encompass the full design flow from start to finish including schematic capture, library development, data base construction and verification. Concept to Gerber High speed digital, Analog, Mixed and RF designs Single Sided to Multi Layer Boards (14+ layers) Constraint driven routing (Constraint Editor, Constraint Manager) Designs with Split planes Controlled Impedance (Single and Differential) designs Design for Manufacture (DFM), Test (DFT) and Assembly (DFA) Reverse Engineering

A proposal has not yet been provided

Hello Sir This should be really simple project I can do it in a few days. We can run some simulation on proteus, and i can make some breadboard testing for you. We can measure total THD gain, noise and so on depending on what you need. I can present you device operation through video call. If interested please fell free to contact me. Regards Milan

Hi, I have preamp circuit designs using ultra-low noise opamps, ill let you choose what opamp from the list below satisfy your goal according to supply voltage and current consumption OPA209 - noise(2.2nV/Hz^-2), consumption(2.5mA), minimum supply voltage(4.5V) OPA314 - noise(14nV/Hz^-2), consumption(0.15mA), minimum supply voltage(1.8V) LMV324 - noise(46nV/Hz^-2), consumption(0.41mA), minimum supply voltage(2.7V) OPA376 - noise(7.4nV/Hz^-2), consumption(0.76mA), minimum supply voltage(2.2V) I can design and test the circuit immediately, I can also layout the PCB in eagle with proper components positioning for maximum filtering to reduce the noise. Please indicate the minimum input voltage, desired maximum output voltage, signal orientation(inverting or non-inverting). If you will hire me, I can give the PCB layout design free service. Looking forward for your reply. Thank you -Mark