Abstract: A one bit memory for bipolar signals is disclosed comprising one channel which samples the positive portion of an input signal and another channel which samples the negative portion of the input signal. Having stored a one bit sample in a separate shift register for each channel, the three level output signal is obtained by combining the outputs of each shift register.

Abstract: An improved multilayered circuit is disclosed comprising a molybdenum substrate with alternating layers of dielectric and conducting thick film materials deposited thereon. The molybdenum substrate has the advantages of being its own chassis, having a coefficient of thermal expansion that is well matched to the thick film materials and component ceramic chip carriers, and having a high thermal conductivity so as to act as its own heat sink.

Abstract: A system and method for providing a relative velocity sighting reference in an airborne gunsight system. A head-up display (HUD) frames the target in the pilot's line of sight and a computer-driven cathode ray tube (CRT) display projects an array of sighting indices or dots on the HUD. The computer receives air data and target tracking inputs and controls the CRT display so that the sighting array automatically overlays and follows the target and so that the indices thereof move in a direction and at a velocity to describe the motion of the line of sight of the target required for the target to intercept a bullet fired from the aircraft gun. The pilot maneuvers the aircraft to null the relative motion between the target and the sighting indices, whereby the gun is in position to fire.

Abstract: A system for aircraft gunnery training and accuracy evaluation wherein a head-up display unit employs a cathode ray tube for projecting simulated bullets on a pilot's sighting panel. The simulated bullets each comprise a pair of bullet trajectory indicia simulating the firing of the guns of the aircraft at an actual target. The indicia in a pair of bullet trajectory indicia are equidistantly spaced from the simulated trajectory path by an amount related to a selected dimension of the target. Each pair of bullet trajectory indicia are initially displayed to reflect the physical conditions of the aircraft at the time of firing, including the rates of aircraft roll, pitch and yaw, the aircraft lift acceleration, true aircraft airspeed, gun angle of attack, and relative air density. As the bullet trajectory indicia traverse the simulated trajectory path, the separation between the indicia comprising a pair of indicia is decreased to simulate increasing distance from the firing aircraft.

Abstract: An improved temperature sensing circuit is disclosed comprising a power supply which forward biases a diode sensing element to control the gain of an operational amplifier. A temperature change causes the resistance of the diode to change, which changes its current flow. Since the anode of the diode is connected to the operational amplifier, the result is that the operational amplifier has a very linear output voltage proportional to temperature.

Abstract: A processor capable of performing a two-dimensional inverse transform on high speed analog data and outputing the results in a display compatible format. The processor utilizes two charge coupled devices (CCD's), two matrix multipliers, which each perform a one-dimensional transform. The one-dimensional transformed data is multiplexed into a series to parallel converter so that another matrix multiplier can complete the two-dimensional transformation of the analog data.

Abstract: A cross-correlation video tracker and method for automatically tracking a relatively moving scene by storing elements from a frame of a video signal to establish a reference frame and comparing elements from a subsequent frame with the stored reference frame to derive signals indicating the direction and angular distance of scene relative movement. A cross-correlation difference signal is generated which represents the difference between a pair of cross-correlation signals dependent on the correlations of the subsequent frame elements and the stored reference elements at two predetermined opposite relative shifts. A circuit is responsive to this difference signal for generating an error signal indicative of the amount of shift required to center the stored reference frame with respect to the subsequent frame.

Abstract: The inverted microstrip phase shifter consists of a substrate having at least one diode and biasing circuitry connected to one side and at least one center conductor connected to its opposite side. The substrate side containing a center conductor is enclosed within a hollow case so as to form an rf transmission line. The parameters for the biasing circuitry are selected by performing a computer optimization of the chain matrix equivalent expression for the voltage transmission coefficient.

Abstract: The temperature compensated positioning device consists of a stationary member, a movable member, a compensating material, and support material between each member. Each member is attached to two surfaces which must be held in a precise dimensional relationship with respect to each other automatically over a wide temperature range.

Abstract: An electromagnetic motor is provided with a samarium cobalt permanent magnet comprising a plurality of radially abutting segments. A combination of linear and non-linear springs with a force gradient larger than the magnetic force gradient facilitate motor operation in proportion to currents in electrical coils positioned on each side of the permanent magnet. Servoamplifiers independently control the current in each electrical coil in response to an input command signal, a motor position feedback signal and an actuator position feedback signal. A failure detection circuit detects coil failure by comparing current in each coil on one side of the magnet with the current in a corresponding coil on the opposite side of the permanent magnet. The circuit produces output signals to disconnect a defective coil and initiate an alarm. The circuit also detects power supply and motor position transducer failures by comparing their respective output voltage signals against predetermined reference voltages.