Method and a device for eliminating the residual error voltage of an amplifier
AssigneeCommissariat a l'Energie Atomique
InventorsDaniel Barbier, Jean-Michel Ittel, Robert Poujois
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Abstract
The connections between the two inputs of an amplifier and the two outputs of a signal source as well as between the outputs of the amplifier and the inputs of a downstream output element into which the amplifier delivers a signal are inverted periodically and simultaneously and integration is carried out between the outputs of the amplifier and the inputs of the output element. In addition, the inputs of the amplifier are short-circuited periodically, the frequencies of inversion and of short-circuiting being multiples of each other.
Claims11
A method of elimination of the residual error voltage of an amplifier having two inputs supplied from a signal source and two outputs, said amplifier being intended to deliver a signal into an output element downstream of said amplifier, wherein the connections between the inputs of said amplifier are periodically inverted with said source and the outputs of said amplifier are inverted with said output element and wherein an integration is carried out between the outputs of said amplifier and the inputs of the output element.
A method of elimination of the residual error voltage of an amplifier having two inputs supplied from a signal source and two outputs provided with a storage element, said amplifier being intended to deliveer a signal into a downstream output element of said amplifier, wherein said method consists in periodically and simultaneously inverting the connections between the inputs of said amplifier with said source and in inverting the outputs of said amplifier with said output element, wherein the inputs of said amplifier are short-circuited periodically, the frequencies of the inversion and short-circuiting operations being multiples of each other and wherein an integration is carried out between the outputs of said amplifier and the inputs of the output element.
An amplifying device, wherein said device comprises:
- at least one amplifier having two inputs A and B and two outputs A' and B', said amplifier being provided with a storage element,
- means for inverting the connections of the inputs A and B of said amplifier with the outputs C and D of a signal source and for simultaneously inverting the connections of the outputs A' and B' of said amplifier with the inputs C' and D' of the downstream element of said amplifier,
- means for short-circuiting the inputs of said amplifier during a predetermined period of time.
Dependencies are inferred from the claim text.