offset voltage

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  1. A

    Why the offset of source-follower（which connected to the output of opamp as voltage buffer) will limit the op-amp output swing ？

    I am currently reading Gray,Hurst's book Analysis and design of analog integrated circuits, chapter 12, the Common-mode feedback circuit. On page 815, he said the following statement for improvement of resistive output loading of CMFB circuit. The following figure 12.17 is the CMFB circuit after...
  2. D

    Opamp and photodiode. Try get to know where should be offset voltage?

    Hi, I created simple circuit with photodiode for pulse oximeter. As you can see I use opamp in single supply mode. After removing DC offset I put 1V offset on non-inverting input on opamp. Then RC filter is connected to grond. Is everyting correct? I wonder if I should connect REF on ADC to...
  3. Philexium

    LM358 single voltage : how to reduce offset voltage ?

    Hi, I have built a VHF field strenght meter (144 MHz). The operational amplifier used is a LM358. I need the strenght meter to be very sensitive ! Due to the high gain (about 1 000), the offset voltage is multiplied too and so without any HF field the needle of the 100 ua galvanometer is...
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