# How to design a circuit with array of amplifiers? [closed]

1. If I have a very tiny signal voltage and I want to amplify it 100 times higher with low noise amplifier, how should I design the circuit? I mean for example how should I know that I need capacitors or resistors or both. How to determine the amount for each resistor?

2. I know this is related to electrical engineering textbooks for circuit design and signal conditioning but I am not electrical engineer and I was wondering if there is a book that already has prepared some circuits for people like me who do not want to design from scratch?

## closed as too broad by pjc50, Matt Young, Scott Seidman, PeterJ, Dave Tweed♦Jan 29 '16 at 16:15

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

• youtube.com/watch?v=K03Rom3Cs28 – lm317 Jan 29 '16 at 15:22
• You will need to be more specific to get much joy searching or asking here. The frequency range is really important just to get started- an amplifier for close to DC or for audio frequencies will be quite different from one for VHF or microwave frequencies. Also, your "low noise" requirement needs to be quantified. – Spehro Pefhany Jan 29 '16 at 15:30
• thank you. This is the output of a sensor I am talking about. I just get some signals from the sensor when I apply force on it. that signal is low and mixed with noise what should I do? How do I know the frequency? (no datasheet for the sensor) – Silas Jan 29 '16 at 15:59
• The signal range is -0.04mv to 0.04mv. lost in noise. – Silas Jan 29 '16 at 17:36
• The sensor has no data sheet. – Silas Jan 29 '16 at 17:37

Beginner electronics. Searching the internet is your friend. There are so many web sites for beginning electronics.

One place to go : http://www.hobbyprojects.com/

With amplifiers, the word GAIN is used to describe how much more the output signal is compared to the input signal. You could search for "amplifier gain 100".

EDIT : To other commentors and other answers, Try to use Key Words in answers and comments, so that other newbies could find this question more easily on a search.

• Thank you pal but I am not talking about the audio. I am talking about sensor and instrumentation. This is not a hobby project I am doing! Most of the stuff out there are for audio applications or my search results are usually tend to how design the amplifier itself rather than using it in the circuit! – Silas Jan 29 '16 at 16:03
• @Silas "pal" is disrespectful. Remember you're the one asking for help here. – Spehro Pefhany Jan 29 '16 at 16:16
• I meant friend. I did not mean anything bad!! Why everyone in here very judgmental! In one comment they call the question "newbie" and then no single satisfactory answer is given with you experts!! – Silas Jan 29 '16 at 16:19
• No satisfactory answer has been given because no satisfactory question was asked. Welcome to SE, Silas. There are quite a few of us who spend a lot of time helping people here but get fed up with people asking bad questions and expecting us to guess what the application is. Put the information in your first comment into your question. Explain what the sensor is. Instead of words like 'tiny signal' use measurements like '5 mV peak to peak at 1 kHz' or 'slowly varying air pressure sensor signal ranging from 0.1 V at sea-level to 0.377 V at 3,000 m'. Do you get the idea? – Transistor Jan 29 '16 at 17:12
• @transistor First of all I am really thankful of all of you. secondly I noticed if I explain more you will put it on hold and say too many questions and If I do not explain you will say it is too general and not enough information. The question is question. If people do not have time to answer simply do not. If people need more specifications and details in the question simply ask it and I try to respond. – Silas Jan 29 '16 at 17:31