Abstract: A Maintain Power Signature (MPS) Powered Device (PD) is described. In one or more implementations, the MPS device comprises a current sensor configured to sense current flowing from Power Sourcing Equipment (PSE) to the PD. The current sense based MPS device also comprises a current generator configured to sink electrical current to prevent the PSE from removing power to the PD. Thus, the electrical current comprises a current amplitude characteristic selected based upon MPS requirements of the PSE. In some implementations, the current is sunk to a ground. In other implementations, the current is sunk to a storage device, such as a storage device included with the PD and/or external to the PD.

Abstract: A Maintain Power Signature (MPS) Powered Device (PD) is described. In one or more implementations, the MPS device comprises a current sensor configured to sense current flowing from Power Sourcing Equipment (PSE) to the PD. The current sense based MPS device also comprises a current generator configured to sink electrical current to prevent the PSE from removing power to the PD. Thus, the electrical current comprises a current amplitude characteristic selected based upon MPS requirements of the PSE. In some implementations, the current is sunk to a ground. In other implementations, the current is sunk to a storage device, such as a storage device included with the PD and/or external to the PD.

Abstract: A Maintain Power Signature (MPS) Powered Device (PD) is described. In one or more implementations, the MPS device comprises a current sensor configured to sense current flowing from Power Sourcing Equipment (PSE) to the PD. The current sense based MPS device also comprises a current generator configured to sink electrical current to prevent the PSE from removing power to the PD. Thus, the electrical current comprises a current amplitude characteristic selected based upon MPS requirements of the PSE. In some implementations, the current is sunk to a ground. In other implementations, the current is sunk to a storage device, such as a storage device included with the PD and/or external to the PD.

Abstract: A bus interface is provided including a first bus transmission medium adapted for being connected to a control signal source which generates a plurality of sequential control signals. During use, the first bus transmission medium serves to communicate the sequential control signals. Associated with the first bus transmission medium is a second bus transmission medium that is in communication with at least one peripheral device. Such device generates an output signal on the second bus transmission medium upon actuation. Tracking circuitry is connected to the device and remains in communication with the first bus transmission medium. By this interconnection, the tracking circuitry is capable of actuating the device upon the receipt of at least one of the sequential control signals that is associated with the device and is distinguishable by a unique sequential order amongst the remaining sequential control signals.

Abstract: A bus interface is provided including a first bus transmission medium adapted for being connected to a control signal source which generates a plurality of sequential control signals. During use, the first bus transmission medium serves to communicate the sequential control signals. Associated with the first bus transmission medium is a second bus transmission medium that is in communication with at least one peripheral device. Such device generates an output signal on the second bus transmission medium upon actuation. Tracking circuitry is connected to the device and remains in communication with the first bus transmission medium. By this interconnection, the tracking circuitry is capable of actuating the device upon the receipt of at least one of the sequential control signals that is associated with the device and is distinguishable by a unique sequential order amongst the remaining sequential control signals.

Abstract: The present invention enables data communications between multiple devices over a single wire bus. This single-wire interface can be used for sensors, amplifiers, analog-to-digital converters (ADCs), or any other circuit which would normally have an electrical output. Advantages of the present invention include a reduction in device pin count, conservation of the limited number of I/O pins on the control device, and reduced board layout complexity. Speaking generally, each slave device coupled to the single wire bus interface is assigned a different response time window. This enables multiple slave devices to respond to an initial trigger signal generated by the master device without overlapping responses being generated on the single wire bus interface.

Abstract: A radiation measurement apparatus and method extends the measurement range of a single Geiger Mueller tube (GMT). The apparatus may operate in a either a conventional mode, used to measure low radiation levels, e.g. background radiation, or an extended range geiger (ERG) mode, used to measure high radiation levels. Both modes utilize the same GMT and basic operating circuitry, including a power supply for generating a GMT anode voltage, a GMT anode voltage control circuit, a GMT trigger circuit, a clock circuit, and a GMT pulse counter circuit. In the conventional mode, the radiation rate is determined as a function of the number of GMT pulses counted over a prescribed time period. In the ERG mode, an additional counter is employed to count trial intervals of a prescribed duration.

Abstract: Small, light-weight portable radiation measurement apparatus provides accurate quantitative measurment of radiation dosage and dosage rates. Such apparatus, referred to as a dosimeter, is housed in a ruggedized housing that is only about 1/2 the volume of a package of cigarettes, may easily be clipped to clothing or carried in a shirt pocket, and is powered by a conventional alkaline AA-sized battery. Included in the housing are a geiger tube for detecting radiation, a high voltage power supply for providing power to the geiger tube, a counting circuit for counting geiger pulses generated by the geiger tube, a microprocessor circuit for processing the geiger pulses in accordance with a prescribed program to determine the does or dosage rate to which the geiger tube has been exposed, and a digital display that displays the dosage rates thus determined. The microprocessor program is stored in memory circuits, included as part of the microprocessor circuit.