FIELD: measuring equipment; information technology.
SUBSTANCE: voltage switch comprises an input voltage source, an operational amplifier, a load resistor, two controlled switches, a source of constant positive and constant negative voltage and a control voltage generator, a common input voltage source bus is grounded, and the output is connected to the non-inverting input of the operational amplifier, the first terminal of the load resistor and the common bus of the control voltage driver and the two DC voltage sources are grounded, two outputs of load resistor form output of controlled voltage switch, control input of first controlled switch is connected to first output of control voltage generator, second output of said shaper is connected to control input of second controlled key, control signals are supplied to the input of the control voltage generator, and additional operational amplifier, output of this amplifier for connection of negative voltage is connected to common output of the second controlled key and output of available amplifier for connection of negative voltage.
EFFECT: technical result consists in reducing the error associated with the actual and final amplification factor of the operational amplifier.
1 cl, 1 dwg
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