My USB connection provides a power supply of +5 Volts and ground, along with signal (USB+,USB-)wires. A USB A/D converter accepts an input in the range of +1 V to +3V. I would like to design a front end for the amplifier which accepts a signal in the range of +- 10 mV and amplifies it to cover the full range of the A/D converter. I would like to use ideal Op amps for my design, except for a common mode input range of 0.5 to 3.5 Volts with this supply voltage. The required Zin is 1Mohm. I should not use resistances greater than 1Mohm in my design. My solution will have 2 op amps and about 7 resistors. How can I design such a device?
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Analogue input amplifier for USB Monitoring device
- Thread starter Electro11
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