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这是设计师说的话原话:
It is not derived from the 741 but my first approach was to use an input differential pair similar to the 741 in order to eliminate the double differential pair to have a symmetric configuration. The 741, as shown in the figures I included, allows for using both output of the input pnp/npn compound to generate useful output voltages (don't remember which design of operational amplifier derived from the 741 was using this configuration). Briefly the figures show
a) a typical 741 (don't remember exacly if it is the original o an early derivation). |
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