The VCA810 is a DC-coupled, wideband, continuously variable, voltage-controlled gain amplifier. What type of an operational amplifier is used w.r.t to the gain control in the circuit?
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It is the high impedance gain control that is used with respect to the gain control in the circuit.
Apart from this, operation temperature, voltage control factor is also an important consideration.
These control units are basically used to vary the gain over a certain range of the amplifier.
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