A special effect apparatus for use in production of a television program or the like, including a latch circuit to obtain delayed video data by delaying input video data for a predetermined time. The input video data and such delayed video data are outputted selectively via switch means at the proper timing that conforms to a desired mosaic pattern, so that continuous video data can be produced for a desired period of time to form a mosaic display element of a desired size and/or shape.

For high speed operation and improvement in transconductance, there is disclosed a heterojunction field-effect device comprising, a first layer of a first compound semiconductor material having a relatively high donor impurity concentration, a second layer of a second compound semiconductor material formed on the first layer and having a relatively low donor impurity concentration and a relatively large electron affinity, a third layer of high-purity compound semiconductor material formed on the...

This high voltage linear FET amplifier operates at voltage levels of ten's of thousand's of volts with power dissipation capabilities in the kilowatt range. It is a broadband device which features power amplification from DC to frequencies well in excess of 100 KHz. The amplifier uses a unity-gain inverting amplifier as its basic building block. N-number of these building blocks are stacked to accommodate whatever voltage stand-off level is desired. To operate stacked high voltage amplifiers, it...

An electrostriction effect element having a simplified construction through the provision of a relatively thick connection portion disposed between two actuator portions. The connection portion preferably has a thickness greater than that of the solder or lead wires which are provided to connect the overall element. As a result, soldering is considerably simplified. Additionally, protection portions may be added at opposite ends of the pillar of electrostrictive material, sandwiching the actuato...

A field-effect semiconductor device including a through-hole electrode formed so as to penetrate from the top to the bottom of the semiconductor substrate, a dielectric film formed on the semiconductor substrate so as to be opposite to the through-hole electrode, and an electrode, forming a through-hole type of passive element, such as a capacitor, so as to improve the integration degree.

Electrodes of a high power, microwave field effect transistor are substantially matched to external input and output networks. The field effect transistor includes a metal ground plane layer, a dielectric layer on the ground plane layer, a gallium arsenide active region on the dielectric layer, and substantially coplanar spaced source, gate and drain electrodes having active segments covering the active region. The active segment of the gate electrode is located between edges of the active segme...

A monolithic microwave integrated circuit switch includes a series field effect transistor having a source drain path in series with an inductive transmission line including plural taps. Source drain paths of plural shunt field effect transistors are connected to the taps. The source drain paths of the series and shunt transistors are biased so that the series and shunt source drain paths have complementary low and high impedance states. The high impedance state is capacitive, having a value on ...

A fiber optic interferometer provides Kerr effect compensation by intensity modulating counterpropagating waves of unequal intensity such that the average value of the square of the intensity is equal to a constant times the average value of the intensity squared, the constant preferably being equal to about two. The intensity modulation may be achieved by using a modulator in combination with a light source or by using a source in which plural frequencies combine to provide the modulation.

A speedometer is provided for determining speed by providing a sound signal at a first frequency, receiving a second signal which is the reflection of the first signal, and determining difference in frequency between the first and second signals created by the Doppler Effect. A speech synthesis chip within the speedometer provides a verbal indication of velocity. In this way, a person using the provided speedometer does not have to look at a dial or other visual indicator. Provided within the sp...

In a weapon effect simulator a low peak power laser projector emits one millisecond bursts of radiation, each burst having either pulse or continuous wave modulation at 170 kHz. A detector for sensing the radiation has several photocells connected in parallel to a single amplifier, and includes a band pass filter tuned to 170 kHz (chosen in harmonic relationship to the modulation frequency) and having a pass band of 2 kHz (inversely related to the duration of each radiation burst).