Abstract: A voltage regulator controls at least one current source of at least one coupled-mode logic gate. The voltage regulator includes a first current source, of a bipolar-type, connected between ground and a first resistor that is connected to a supply voltage. The first current source is controlled by a voltage across a second resistor that is fed by a current from a second current source of a MOS-type. The current value of the second source determines the voltage of an output terminal of the regulator by duplicating this current on a third current source that is mirror-connected to the second source.

Abstract: A logic circuit has at least one first differential stage made of bipolar transistors operating in linear mode. The first differential stage is connected in a branch of a second differential stage biased by a current source. The second stage and the current source are made of MOS transistors.

Abstract: A stable reference voltage generator using a current mirror circuit comprising a primary branch and a secondary branch, is shown and described. A first bipolar transistor (Q1) has its collector connected in series with the primary branch of the current mirror, and a voltage divider bridge comprising at least two series-connected resistors (R1, R2), is connected in series between the secondary branch of the current mirror and the collector of a second bipolar transistor (Q2). The base of the second transistor (Q2) is connected to the common point of the series resistors, the base of the first transistor (Q1) is connected to the collector of the second transistor (Q2), and the output of the generator (V.sub.REF) is connected to the terminal of the bridge opposite that connected to the collector of the second transistor (Q2). The geometry of said transistors being such that the first transistor (Q1) is equivalent to "N" transistors identical to the second transistor (Q2) connected in parallel.

Abstract: An analog digital converter is used to convert differential analog voltages, namely voltages with reference potentials that are not at ground. The arrangement described requires only one differential amplifier.

Abstract: In order to diminish the risk of oscillation of a broad-band amplifier 20 MHz without considerably reducing the product gain x bandwidth, this amplifier comprises a differential stage T1, T2, T3, T4, a follower stage T5, T6, two common mode feed-back braches T8, T9, T5 on the one hand, T11, T12, T10, on the other hand, and compensation capacitors C1, C2 that are unbalanced, C2 higher than C1, between the supply terminal B and each of the outputs S1, S2 of the differential stage.

Abstract: The separation of cobalt from nickel is enhanced by extracting aqueous solutions of the respective thiocyanates with a cyclic ketone, preferably isophorone.

Abstract: Copper values are extracted from aqueous solution by dihydroxy azoarenes dissolved in a water immiscible organic solvent.

Abstract: A stable reference voltage generator using a current mirror circuit comprising a primary branch and a secondary branch, is shown and described. A first bipolar transistor (Q1) has its collector connected in series with the primary branch of the current mirror, and a voltage divider bridge comprising at least two series-connected resistors (R1, R2), is connected in series between the secondary branch of the current mirror and the collector of a second bipolar transistor (Q2). The base of the second transistor (Q2) is connected to the common point of the series resistors, the base of the first transistor (Q1) is connected to the collector of the second transistor (Q2), and the output of the generator (V.sub.REF) is connected to the terminal of the bridge opposite that connected to the collector of the second transistor (Q.sub.2). The geometry of said transistors being such that the first transistor (Q1) is equivalent to "N" transistors identical to the second transistor (Q2) connected in parallel.