Abstract: An operational function checking method and device for a microprocessor, which uses four circuits to verify that a microprocessor and processing system are operating properly.

Abstract: A multi-option, multi-cell, vacuum activated, deferred action battery which consists of a non-frangible vial which can be punctured allowing a vacuum pressure in a battery cell assembly to draw said battery fluid into said battery cells thus activating the device. This activation can occur with or without external forces such as spin or setback.

Abstract: A power relay/safing device for a fuze in a free-fall munition having an electronic circuit coupled to the fuze and to a primary power source and to a turbine generator backup power supply. At the time of munition release, an electric current is sent to the fuze from the primary power supply. If a portion of this electric current is not received at the electronic circuit, the circuit determines if various safety features have been satisfied and relays a second electric current from the turbine generator backup power supply to the fuze. The turbine generator backup power supply is activated by a lanyard at the time the munition is released.

Abstract: A receiver which converts the RF carrier to a very low frequency and incorporates a PLL demodulator which allows the IF to be AC coupled. This PLL demodulator does not include the IF filters. The bandwidth of the PLL demodulator is wide enough to demodulate FM. Also, components of the receiver can be switched to a transmission mode capable of FM or PSK modulation with a simple circuit. Finally, the receiver includes an AM or PSK coherent amplitude detector which is modified into an imageless spectrum analyzer.

Abstract: A miniature wide-band microwave power divider comprising a common terminal connected to a plurality of parallel signal paths with each signal path comprising a low pass and a high pass filter made up of discrete components. Use of discrete components allows the entire power divider to be incorporated on a single chip. Isolation is achieved between the signal paths by isolation means comprising resistors.

Abstract: An optical injection locking oscillator is comtemplated having a tuning device. The tuning device generates a DC voltage proportional to the resonant frequency of a modulated light used to injection lock the free running oscillator. The DC voltage is applied to a varactor capacitor within the oscillator to bring the frequency of oscillation within a close proximity to the modulating frequency of the light. This facilitates injection locking, whereas frequencies of oscillation outside a certain locking range will not facilitate injection locking. The modulated light then locks the oscillator into a desired resonant frequency. A second embodiment contemplates using a YIG oscillator regulated by a DC current generated within the tuning device.

Abstract: An air powered generator having only one moving part and no bearing surfaces comprises a whistle, an electric coil diagonally attached to the walls of the whistle, and a magnetic means which moves freely in a two-dimensional plane within the whistle. As air is forced into the whistle, the magnetic means oscillates back and forth with respect to the diagonally oriented electric coil to create an electric current in the same manner as an electric current is induced by passing a magnet in and out of a loop of wire.

Abstract: A ring stabilization circuit including a ring and three spaced apart arms, one of which has a dielectric resonator coupled thereto and acts to reflect, to the output arm, a resonant frequency supplied to the input arm. The impedance of the stabilization circuit is tailored to present to an oscillator an impedance value which over temperature, PRF, and other frequency changing perturbations, gives the oscillator the impedance required in order for the frequency drift to be minimized.

Abstract: A voltage tunable bandpass filter consisting of a plurality of parallel resonators electromagnetically coupled and having tuning diodes coupled to a first end. The resonators are DC isolated at a second or RF grounded end of each resonator. A voltage source reverse biases the tuning diodes from the second or less critical end of the resonators.

Abstract: A digital poly phase pulse compressor that utilizes delay lines to separate KN samples of a received compressed pulse in I and Q channels, multiplies N of the KN samples with quadrature, weighted code phase signals by shifting and adding, cross couples the products of the shifting and adding in the I and Q channels to remove all code phase terms from the N samples in each channel, and combines the final n signals to provide I and Q compressed pulse components. The I and Q channels can be expanded into pluralities of channels to include compensation for Doppler shift.

Abstract: The present invention consists of a hardware simulator with bus evaluator logic for use in simulating and fault grading of very large scale digital circuits containing buses. In this invention the status of a bus is continously upgraded each time a primitive is evaluated that has an output coupled to the bus. As bus driver primitives are evaluated, the state of the bus is determined on the fly and stored in an accumulator register, called the bus register. Evaluation of the bus continues using the data stored in the bus register and the state of each driver until all drivers have been evaluated. After the last bus driver is evaluated the state of the bus is known and the bus primitive is assigned the value, or state, stored in the bus register hardware and is passed to all receivers on the bus.