Abstract: An audio amplifier includes an output stage including a first toroidal transformer with a first pair of secondary windings that are coupled in parallel across an output terminal. The output stage further includes a second toroidal transformer with a second pair of secondary windings that are connected in a series combination that is coupled across the output terminal.

Abstract: An audio amplifier includes an output stage including a first toroidal transformer with a first pair of secondary windings that are coupled in parallel across an output terminal. The output stage further includes a second toroidal transformer with a second pair of secondary windings that are connected in a series combination that is coupled across the output terminal.

Abstract: An audio amplifier includes an output stage including a first toroidal transformer with a first pair of secondary windings that are coupled in parallel across an output terminal. The output stage further includes a second toroidal transformer with a second pair of secondary windings that are connected in a series combination that is coupled across the output terminal.

Abstract: An apparatus includes an array of compression electrodes and an analysis circuit. The array of compression electrodes includes a pair of outer compression electrodes and a pair of inner compression electrodes. Each of the electrodes includes a contact pad and may be configured to automatically adjust to follow a contour of an object while maintaining contact of the contact pad with a surface of the object. The analysis circuit can be coupled to the array of compression electrodes. The analysis circuit may be configured to automatically make a bioelectrical impedance measurement using the array of compression electrodes and generate a value representing a cell integrity of said object.

Abstract: An apparatus includes an analysis circuit and a controller. The analysis circuit may be configured to automatically make a plurality of segmental bioelectrical resistance and reactance measurements using permutations of a plurality of electrodes selected four at a time. The plurality of electrodes are configured to be attached to predetermined locations on a body of a subject. The controller may be configured to (i) calculate a plurality of segmental body composition values using the plurality of segmental bioelectrical resistance and reactance measurements, a number of predetermined coefficients, and a number of predictive equations, and (ii) generate a report presenting the plurality of segmental body composition values and a total body composition value. The number of predetermined coefficients are stored in a lookup table. Each of the segmental body composition values when added sum to a value essentially equal to respective whole body composition values.

Abstract: A biometric healthcare data system has biometric data collection stations and a network management system. Each station has several biometric data measurement devices including a bioelectrical impedance analysis system. Each station has a gateway that connects to the devices and that connects the station through the internet to the network management system. The network management system has a communications manager that tracks the stations, a content manager that provides content to the stations and a data manager that retrieves and stores data from the data collection stations.

Abstract: An apparatus for measuring the resistance and reactance of a subject, or a segment of a subject, includes a constant current source supplying a periodic high frequency input current to the subject. The constant current source controls the input current to a targeted value by measuring the actual current through the subject and comparing that actual current to the target current. The resulting error signal controls the input current. The input current is supplied to the segment through a coupling transformer, and another coupling transformer coupled to a resistor in the subject path supplies the value of the actual current. The apparatus also includes an impedance measuring circuit that detects an output voltage across the segment, preferably using a detection coupling transformer, and produces at least one of a reactance output signal and a resistance output signal using the output voltage. In one aspect, an automatic shut down circuit is included.

Abstract: An air bearing supports and guides a moving web with a linearly constant distribution of air between the bearing and the moving web. An exterior tubular member is fixedly mounted over a first tubular member having a central bore connected to a pressurized air source. Air flow apertures are formed in the first tubular member in fluid flow communication with the central bore in the first tubular member. The exterior tubular member is formed of a porous, air permeable material to evenly distribute air flow from the air flow apertures in the first tubular member evenly about the periphery of the exterior tubular member to form a linearly constant, even distribution of air across the length of the exterior tubular member to evenly support a moving web.

Abstract: A circuit for indicating angular position of a rotary member comprising a resolver including an amplitude stabilized sine-cosine generator coupled to quadrature windings of the resolver for providing a d.c. signal which varies as a linear function of the position of a rotatable member coupled to the resolver. The d.c. signal is fed to a plurality of comparators for comparing such angular position to a plurality of predetermined angular set points. The comparators are coupled to a priority encoder for indicating angular position of the rotary member. The encoder includes a switch array and a plurality of exclusive-OR gates for programming the encoder to provide a zero output at an arbitrary position of the rotary member. A digital voltmeter calibrated in angles of member rotation is coupled through a plurality of momentary contact push-button switches for normally receiving the d.c.