Integrating device with variable integral time constant

Abstract

The invention discloses an integrator of a variable integral time constant. The integrator comprises an operational amplifier and is characterized in that: a voltage input end is connected to an inverting input end of the operational amplifier after passing through an option switch and an option circuit comprising a plurality of resistances with different resistance values; a non-inverting input end of the operational amplifier is grounded; the option switch and the option circuit comprising a plurality of resistances with different resistance values are connected between the inverting input end and an output end of the operational amplifier. The integrator of the variable integral time constant, which is provided by the invention, can switch over an integrating resistance or an integrating capacitance according to the integrator output condition last time (or in a period of time) so that the output amplitude of the integrator is not too small and Signal-to-Noise can be improved, or the integrator prevents errors caused by output saturation and makes full use of performance of the integrator.

Description

Technical field: [0001] The invention relates to the field of integrators, in particular to an integrator with variable integral time constant. Background technique: [0002] Integrators are mainly used in electromagnetic measurements of some devices. For example, in the process of tokamak discharge experiments, the output of many electromagnetic measurement diagnostic signals is the differential component of the signal. To restore the signal, an integrator is needed. These differential signals also have different sizes. If an integrator with a fixed integration time constant is used, then for a larger input signal, the output of the integrator may be saturated, and for a smaller input signal, the output of the integrator is also small, so it cannot Make good use of the dynamic range of the integrator. Invention content: [0003] In order to solve the problems existing in the prior art, an integrator with variable integral time constant is provided, and the integral time ...

AI Technical Summary

Problems solved by technology

These differential signals also have different sizes. If an integrator with a fixed integration time constant is used, then for a larger input signal, the output of the integrator may be saturated, and for a smaller input signal, the output of the integrator is also small, so it cannot Make good use of the integrator's dynamic range

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