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Not generally, it's a function of the bandwidth (respectively measurement time) and possible long term stability requirements.several microvolt is too small
It's a part of clock generator.However,the forward stage only provide a voltage difference about several microvolts,it's differential,thus no voltage reference is needed.FvM said:several microvolt difference to what? A reference voltage existing in your circuit?
yes,that's right.What I need to do is to amplify a uv signal to a logic voltage.The first stage of course is used to generate a uv difference(sorry for further detail ),then amplifier is needed to amplify this signal ,and followed by a shaping circuit,which turn a weak pulse to a clk.FvM said:This is called amplifier in electronics, usually. In many applications, uV and sub-uV voltages are amplified. It may be also possible in your case. If you give some substantial information about it, EDAboard members can help.
it is about 50 meg;Sinisa said:You failed to say what frequency of clock you have. If it is not at fixed frequency what is the range of frequencies.
It is about 50 meg;
I don't regard this important
...several microvolt is too small...
Not generally, it's a function of the bandwidth (respectively measurement time) and possible long term stability requirements.