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Fast-analog-digital-converter-with-parallel-structure

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Details

Inventors: Masson, Thierry;
Assignee: Thomson Composants Militaires et Spatiaux (Paris, FR)
Primary Examiner: Shoop, Jr.; William M.
Assistant Examiner: Logan; Sharon D.
Attorney, Agent or Firm: Oblon, Spivak, McClelland, Maier & Neustadt

Disclosed is an analog/digital converter designed to convert an analog voltage into a digital voltage with n bits. The converter comprises: p=2.sup.n comparators capable of comparing the analog voltage with a reference analog voltage obtained by a voltage generator, each comparator comprising an inverter amplifier, a capacitor having a first terminal connected to the input of the amplifier and wherein, before the application of the analog voltage, each amplifier is connected in short-circuit feedback loop while the reference voltage is applied to the other terminal of the capacitor, this operation being performed no longer in parallel for all the amplifiers but successively, one after another in order to reduce the consumption of current during this operation.

DETAILED DESCRIPTION An object of the present invention therefore comprises the making of an analog/digital converter designed to convert an analog voltage into a digital voltage of n bits Another object of the invention is an analog/digital converter wherein the decoding means further have logic gates connecting the outputs of the flip flops in sets of three to enable the detection of a transition in state in order to ascertain the binary encoding of the input voltage Vin.

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