This is a design circuit for precision of DC amplifier circuit. This circuit has reasonable recovery
(~7 μs) from a 100% overload; but beyond that, AC coupling to the fast amplifier causes problems. This circuit is based on LM11. This is the figure of the circuit;
Alone, the gain error and thermal feedback of the LH0032 are about 20 mV, input referred, for ±10V output swing. Adding the LM11 reduces this to micro volts. An ammeter should read zero with no input current and have no voltage drop across its inputs even with full-scale deflection. Neither should spurious indications nor inaccuracy result from connecting it to low impedance. Meeting all these requirements calls for a DC amplifier, and one in which both bias current and offset voltage are controlled.
[Schematic circuit source: National Semiconductor Notes]
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