A current source in which the output current from an output amplifier stage (2) is controlled by an input signal, originating in a signal source (11), to an input amplifier stage (1) incorporates, additionally to a negative feedback path from the current input path of the output stage (2) to the input amplifier (1), monitoring means (5) in the signal input path to the output amplifier (2) and control means (4) in an input path to the input amplifier (1). Monitoring means (5) monitors the current...

A current isolator circuit generates an electrically isolated output current which is related to an input current. The current isolator includes a magnetically saturable transformer having a core and first, second, and third windings. The input current flows through the first winding, and the output current flows through the second winding. The third winding is driven by a periodic drive signal, which alternately drives the transformer between first and second magnetically saturated states. When...

A current transformer is encapsulated in an injection molded layer of insulating material. The current transformer includes a secondary terminal assembly having individual terminals mounted on a terminal board. The terminal board is formed of a material that softens within the normal processing temperature range of the encapsulating material and forms an amalgamation therewith without a distinct interface between the terminal board and the encapsulating material which thereby provides a fluid-ti...

A current stabilizer has a current mirror including first and second terminals through which first and second currents flow. A transistor circuit including a transistor and a resistor is connected to the first terminal so as to cause the first current to flow therein, which first current defines the current which may flow through the second terminal. The biasing of the transistor is selected with respect to the temperature coefficients of the transistor and resistor so that the first current rem...

According to the present invention there is provided a current detector useful in interconnection of an automatic telephone exchange with a central office via TIP and RING leads and comprising; rectifying apparatus coupled to the TIP lead for rectifying at least a portion of the current flowing therealong of either polarity; and detector apparatus receiving the rectified output of the rectifying means and providing a DC output signal indicating current passage along the TIP lead.

Disclosed is an elongated housing containing a current meter for determining the velocity and direction of a current in a body of water, wherein the housing has a plurality of fins for flow stability and a connecting member joins the housing to a standoff framework, which in turn is fastened to an anchored line in the body of water.

Current divider for producing a plurality of currents which are in fixed ratios to one another at a plurality of output terminal which are connected to a sum terminal through a circuit. The currents are obtained by means of mathced transistors having parallel-connected base-emitter paths. In order to compensate for deviations in the desired currents due to the base currents of said transistors, provision is made for a compensating circuit which insures that accurately defined currents are suppli...

A relatively small collector current flows in a junction transistor having its base and emitter electrode connected to a common terminal by first and second pluralities of serially connected semiconductor junctions, respectively, the first plurality of semiconductor junctions being arranged to be forward biased by a first current and the second plurality of semiconductor junctions arranged to be forward biased by a second current proportional to the first current. Such semiconductor junctions ma...

An MOS field-effect transistor having its gate electrode connected to its drain electrode can be used to operate as a constant current device by means of a resistive network placed between its source and substrate electrodes.

Circuit arrangement providing a constant current amplification which is determined by the ratio between the emitter surface areas of a first and a second transistor of one conductivity type, the first transistor passing the input current and the second transistor passing the output current. The base currents for these transistors are supplied by a third transistor of the other conductivity type the base of which is connected to the collector of a fourth transistor of the one conductivity type in...