Abstract: A standby power supply arrangement comprises a transistor with its emitter coupled to one pole of a standby battery and its collector coupled to a load. The transistor base is coupled to the other pole of the battery by way of a threshold device. When the battery voltage falls below a given limit, the threshold device no longer conducts, causing the transistor to cease to conduct power to the load.

Abstract: An arrangement for coarse and vernier measuring of the delay or phase shift introduced by a delay path by generating a recurrent pseudorandom signal at an original chip clock rate derived from a reference clock. At the receiving end of the delay path, a delay locked loop regenerates the chip clock and the pseudorandom signal at a phase established by the delay. The coarse count is measured by the number of chip clock cycles. The vernier delay is measured in terms of a fractional portion of a chip clock cycle. The vernier measurement is made by starting a counter which counts reference clock signals in response to a coincidence of the original chip clock and the reference clock, and by ending counting and latching the count in response to coincidence of the regenerated chip clock and the reference clock.

Abstract: A low-friction slide apparatus for use with the translation stage of an optical disc recording/playback system is disclosed. The apparatus includes a rail which is fixed in position. The rail includes porous strips affixed to two orthogonal sides along its longitudinal dimension. A plurality of passages between the rail and the porous strips permits air to be forced outwardly through the pores of the strip material. The slide member, which is movably mounted on the rail, has bearing surfaces adjacent the porous strips attached to the rail. Permanent magnets mounted along these bearing surfaces maintain an attractive force between the slide and the rail, countering the force direction of the air flow, thus providing a low-friction bearing film of compressed air. A linear motor included in the rail and slide member induces motion of the slide along the rail.

Abstract: A companding system for a television audio apparatus includes a compressor and an expander for stereo difference signals. The compressor provides variable preemphasis of high frequency signal components and the expander provides complementary variable deemphasis. At the receiver, unwanted signals are generated by a mixer that demodulates the stereo difference signal. The unwanted signals can cause mistracking of the expander relative to that of the compressor. A filter to eliminate the effect of these unwanted signals is placed in the expander control circuit, rather than the difference signal path. This eliminates the need and expense of an equalizing filter in the sum signal path.

Abstract: An apparatus for the treatment of a substrate with two or more gases includes a reaction chamber with an outlet and an inlet, and a gas introduction manifold comprising a closed hollow body with a cylindrical interior. Feed ports, extending through a wall of the body, are integral with valves disposed about said body. An aperture extends through an end surface of the body which aperture is connected to the inlet of the chamber. The valves are disposed such that they are at equal distances from the center axis of the inlet.

Abstract: An improved electron beam resist structure comprises an organic planarizing layer which has been treated with an ion beam for a time sufficient to render it conductive and an electron beam resist layer thereover. The electron beam resist layer is preferably oxygen plasma resistant. When the resist layer is not resistant to oxygen plasma and it is desired to develop the planarizing layer by oxygen plasma, the structure additionally includes a thin hard mask layer, suitably of silicon dioxide, interposed between the conductive planarizing layer and the resist layer.

Abstract: A defect corrector for a solid-state imager in which temperature tracking defect correction signals associated with the defective pixels are generated. The temperature tracking defect correction signals are combined with photoresponse signals from the corresponding defective pixels to provide defect compensation for the photoresponse signal developed from each of the defective pixels.

Abstract: A latch for securing a printed circuit board adjacent one side of a television chassis wall comprises a T-shaped tongue having a stem connected at one end to the bottom of a plastic body, the other end of the stem adjoining a crossbar. The latch also includes a U-shaped groove disposed adjacent to the top of the body along a major surface thereof for receiving an edge of the printed circuit board. The chassis wall has a neck defined by two shoulders spaced apart to support, respectively, L-shaped arms connected to each side of the body at the bottom thereof. The tongue passes through a T-shaped aperture in the wall beneath the neck such that the crossbar contacts the side of the chassis wall opposite the one side, the aperture being shaped to allow the crossbar to pass therethrough before making contact with the opposite side of the chassis wall.

Abstract: An adaptive television deghosting system operates on modulated video signals including a direct signal component and one or more ghost signal components. The system uses synchronously demodulated in-phase and quadrature-phase baseband video signals as the respective real and imaginary input signals to a complex IIR filter. The filter coefficients are developed adaptively from preset initial values using the signals provided by the filter during a training interval. The training interval includes the interval between the leading edge of the vertical sync pulse and the first serration pulse of each field. The filtered training signals are subtracted from a sync-tip reference value to develop a signal which is proportional to the error in the filter coefficient values. The error signal values corresponding to ghost signals are multiplied by the complex conjugate of the training signal values which represent the analogous sampling points of the direct signal.

Abstract: Multiresolution processing apparatus (which may be programmed as pyramid processing apparatus) comprised of a filter logic unit comprised of one or a plurality of identical interconnected programmable modules; a set of programmable multiplexers (MUX), a plurality of programmable random access-memories (RAM), and a timing and control means including an instruction memory for programming the flow of information data through and the operation of the filter logic unit, the set of MUX and the plurality of RAM. This permits a single stage to sequentially operate as each separate stage of an FSD or Burt Pyramid analyzer or of a pyramid synthesizer.

Abstract: A frame comb filter includes a pair of serially-connected field memories. In the normal display mode, the first field memory stores one field of incoming composite video signal CVS and provides a field delayed video signal FDS. The second field memory stores one field of the field delayed video signal FDS and provides a frame delayed video signal FRS2. The incoming composite video signal CVS is combined with the frame delayed video signal FRS2 to generate a Y/C separated component luma signal CLS. In the zoom processing mode, the first field memory stores two fields or one frame of incoming composite video signal corresponding to the zoomed portion of the input image, and provides a frame delayed composite video signal FRS1 at its output. The incoming composite video signal CVS is combined with the frame delayed video signal FRS1 representative of the zoomed portion to produce a Y/C separated component luma signal CLS for the zoomed portion.

Abstract: A dual gate field effect transistor (FET) is configured as a self-buffering local oscillator of a tuner by arranging the FET in a cascode configuration in which the first gate electrode is coupled to the source electrode through an oscillation conditioning network and also to a frequency determining network, the second gate electrode is coupled to signal ground through a negligible impedance and the drain electrode is utilized as the output of the oscillator.

Abstract: A digital television receiver, having a line locked clock, includes a first digital phase locked loop which regenerates quadrature phase related subcarrier signals that are used to synchronously demodulate the chrominance signal components of composite video signals into color information signals. When nonstandard video signals (e.g., from a video tape recorder) are processed by the receiver, frequency instabilities in the line locked clock signal may cause the color information signals to be distorted. To compensate for this distortion, a second phase locked loop is synchronized to a reference signal generated by an analog oscillator. The analog reference signal is linearly added to baseband analog video signals provided by a tuner. The combined signals are digitized by an analog-to-digital converter and then filtered by parallel low-pass and band-pass filters to develop digital signals representing the video signals and the reference signal, respectively.

Abstract: A single pole double throw rotary switch includes a non-conductive terminal board. A washer-like wiper element is rotatably secured to the terminal board by a tubular rivet. An outwardly extending portion of the wiper element selectively engages one of a pair of output terminals. When the wiper element occupies a midrange position, the rotary switch is electrically open. A non-conductive actuating member is rotatably mounted on the terminal board for positioning the wiper element.

Abstract: A magneto-optic disc recording system includes an E-shaped electromagnet for providing magnetic biasing selectively for the recording and erasing processes. The middle arm of the E comprises a first pole piece and is positioned radially with respect to the disc rotation, on the opposite side of the disc from, but aligned with, the path of radial motion of the focused recording/erasing light beam. The other arms of the E, parallel to the middle arm, comprise second pole pieces opposite in polarity from the first pole piece, and are positioned adjacent the disc recording surface on the opposite side of the disc from the middle arm. Two shoes of a magnetic material, coupled to the optical translation stage, provide a magnetic circuit between the respective second pole pieces and the area surrounding the objective lens focusing light on the disc recording surface, relaying a substantially vertical magnetic field through the disc at the point of incidence of the focused light beam.

Abstract: A method of forming a resistor comprises forming a conducting layer on a substrate. An area of the layer is removed such as by etching. A resistor portion is formed in the area. The conducting layer including the resistor portion can be p-Si. The substrate can comprise an insulator such as Al.sub.2 O.sub.3 and a barrier layer can be formed on the substrate to achieve improved radiation hardening.

Abstract: Two or more distributed amplifiers are paralleled to increase the available output power. Phase shifters are coupled to the amplifiers as necessary to maximize output power at a frequency. With this phase adjustment, the amplifiers may have effective electrical lengths which differ one from another by N (360.degree.), where N is zero or an integer. Values of N other than zero undesirably reduce the instantaneous bandwidth of the paralleled amplifiers. The bandwidth is maximized by the addition of sufficient delays to reduce N to zero.

Abstract: A combination frame comb/freeze frame apparatus is disclosed. In the normal mode, the apparatus serves to separate one of the component signals (luma or chroma) from a composite video signal. In the freeze frame mode, the separated component signal is stored in the frame store, and repeatedly read out and displayed on the TV screen.

Abstract: A radio frequency signal coupler includes first and second conductors formed on an insulating body for coupling signals between respective input and output couplings. A series resonant circuit is formed on the insulating body between the first and second conductors for shunt attenuating interfering signals. The series resonant circuit includes a capacitance part that also functions as a protective spark gap.

Abstract: A magneto-optic disc recording system includes a cylindrical permanent magnet for providing magnetic biasing selectively for the recording and erasing processes. The magnet is positioned radially with respect to the disc rotation, on the opposite side of the disc from, but aligned with, the path of radial motion of the focused recording/erasing light beam. The poles of the magnet are diametrically opposed, and the magnet is axially rotatable. Circular eddy currents, induced by the magnetic field of the magnet on the surface of the rotating disc, generate a second magnetic field which opposes the field of the magnet, thus impelling rotation of the magnet. A stopping mechanism stops the rotation of the magnet with one or the other of its poles adjacent the disc, such that either a recording or erasing magnetic bias is selectively provided to the recording region.