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1. CA2084657 - COMPARATEUR CMOS A SIGNAL PERIODIQUE

Office Canada
Numéro de la demande 2084657
Date de la demande 03.04.1992
Numéro de publication 2084657
Date de publication 15.10.1992
Numéro de délivrance
Date de délivrance 11.06.2002
Type de publication C
CIB
H03K 5/24
HÉLECTRICITÉ
03CIRCUITS ÉLECTRONIQUES FONDAMENTAUX
KTECHNIQUE DE L'IMPULSION
5Manipulation d'impulsions non couvertes par l'un des autres groupes principaux de la présente sous-classe
22Circuits présentant plusieurs entrées et une sortie pour comparer des impulsions ou des trains d'impulsions entre eux en ce qui concerne certaines caractéristiques du signal d'entrée, p.ex. la pente, l'intégrale
24la caractéristique étant l'amplitude
H03K 3/356
HÉLECTRICITÉ
03CIRCUITS ÉLECTRONIQUES FONDAMENTAUX
KTECHNIQUE DE L'IMPULSION
3Circuits pour produire des impulsions électriques; Circuits monostables, bistables ou multistables
02Générateurs caractérisés par le type de circuit ou par les moyens utilisés pour produire des impulsions
353par l'utilisation, comme éléments actifs, de transistors à effet de champ avec réaction positive interne ou externe
356Circuits bistables
CPC
H03K 5/2481
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
5Manipulating of pulses not covered by one of the other main groups of this subclass
22Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
24the characteristic being amplitude
2472using field effect transistors
2481with at least one differential stage
H03K 3/35613
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
3Circuits for generating electric pulses; Monostable, bistable or multistable circuits
02Generators characterised by the type of circuit or by the means used for producing pulses
353by the use, as active elements, of field-effect transistors with internal or external positive feedback
356Bistable circuits
356104using complementary field-effect transistors
356113using additional transistors in the input circuit
35613the input circuit having a differential configuration
H03K 5/249
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
5Manipulating of pulses not covered by one of the other main groups of this subclass
22Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
24the characteristic being amplitude
2472using field effect transistors
249using clock signals
Déposants ANALOG DEVICES INC.
Inventeurs VINCELETTE, SCOTT
Données relatives à la priorité 681,122 05.04.1991 US
Titre
(EN) CMOS STROBED COMPARATOR
(FR) COMPARATEUR CMOS A SIGNAL PERIODIQUE
Abrégé
(EN)
An all CMOS voltage comparator circuit which incorporates a strobed latch. A strobe signal precharges the entire circuit to a known state which is independent of the input voltages and in which substantially no static current is drawn. Under static conditions after the circuit has been strobed, the source-coupled pair is virtually disconnected from the supply voltage(s) and draws almost no current, as well. then the circuit is strobed, a source-coupled FET pair amplifies the differential input signal, with positive feedback provided through a pair of cross-coupled PMOS load transistors, as well as cross-coupled NMOS cascode transistors. The source-coupled pair feeds a pair of output buffers, or drivers, whose FETs are sized such that a "low" voltage level is generated on both outputs until the source-coupled pair resolves the input voltage difference (i.e., the differential input voltage exceeds the switching threshold). At that time, the outputs become complementary digital levels and are usable.

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