Abstract: Before subsampling them for transmission, telemetry data are bandwidth-limited by IIR filtering at the sending station of a telemetry system. The transmitted filtered telemetry data have attendant phase distortion that is compensated for by FIR filtering at the receiving station of the system, so as to obtain overall linear phase response through the system.

Abstract: A charge injection imaging device comprises low bandwidth, low noise performance column amplifiers serially connected to respective charge coupled device storage lines. Image and/or noise defining electronic information signals are retrieved from the charge injection imaging device by way of the amplifiers and storage lines in a manner which provides image defining electronic information signals from which the noise defining electronic information signal portions have been automatically subtracted for each succeeding photosensitive element of the device. The subtracted noise portions include both KTC noise and fixed pattern noise which are normally inherently associated with the image defining electronic information signals retrieved from the charge injection imaging device.

Abstract: A pressure transducer has a first electrode fabricated with a predetermined shape upon a substrate surface. A first insulator encloses that portion of the first electrode not enclosed by the substrate; a second insulator forms a wall to a predetermined height above the substrate surface, and outwardly adjacent to the entire periphery of the first electrode. The wall has a base in pressure-tight connection to the substrate and a top opposite to the base.

Abstract: A coherent light phase detecting focal plane array uses a bulk substrate of a first conductivity-type semiconductor, with a layer of the opposite conductivity-type of that semiconductor formed into an array of CTD cells each storing charge converted from optical photons impingent upon the layer, when positioned in the focal plane of apparatus in which the array is used. Surrounding each cell are four FET structures which separately and individually collect the charge samples during an associated different one of four sampling periods, corresponding to the four quadrants of a two-dimension phase space (+I, +Q, -I and -Q samples). Each FET has five gate electrodes, so as to provide five individual regions for storage and manipulation of the photo-induced change during acquisition, readout and disposal.

Abstract: A simple digital filter having only a single multiplier operates to extract the pilot tone from a demodulated and digitized FM stereo signal. The number of poles in the filter is chosen so that the filter output is also usable to produce a digitized representation of the carrier tone for the left minus right stereo channel. This signal is in turn used to decode the input representation into the desired left and right channel signals. The circuit of the present invention is particularly amenable to fabrication on an integrated circuit chip.

Abstract: Programmable signal processing apparatus for multiplying a sampled analog signal by a multiple bit digital word coefficient. All signal processing operations are accomplished by the splitting, routing and combining of charge packets formed in a charge domain device.

Abstract: Programmable signal processing apparatus for multiplying a sampled analog signal by a multiple bit digital word coefficient. All signal processing operations are accomplished by the splitting, routing and combining of charge packets formed in a charge domain device.

Abstract: The signal processing apparatus includes a plurality of multiplying or charge splitting stages connected in series. A plurality of pairs of control words are provided, one word of each pair being the complement of the other word of the pair. Each pair of words is associated with a respective multiplying stage and represents the multiplying coefficient of a respective multiplying stage. Means are provided for forming a plurality of quantities of charge, each representing a respective sample of an analog signal. Each of the quantities of charge is introduced in sequence into each of the multiplying stages in which it is processed and then passed on to the next multiplying stage. The process operation in each of the multiplying stages includes dividing the quantity of charge in a series of splitting operations under the control of the pair of words associated with the stage into two parts. All of the first parts of each of the quantities of charge in each of the stages is summed.

Abstract: A first video signal is provided comprising a plurality of lines of a luminance signal, a first color signal and a second color signal, each of the lines having a duration of a first predetermined time. Each of the nonoverlapping pairs of successive lines of the luminance signal are summed and differenced to provide a luminance sum signal and a luminance difference signal. Each of the nonoverlapping pairs of successive lines of the first color signal and also of the second color signal are summed to provide a first color sum signal and a second color sum signal. The luminance difference signal, the first color sum signal and the second color sum signal are bandwidth limited in relation to the luminance sum signal. Corresponding lines of these signals are time compressed to the same bandwidth and then time multiplexed to form a corresponding line of a first compound signal, each line of which has a duration of the aforementioned predetermined time, and alternate lines of which have zero amplitude.

Abstract: A system is described which makes use of the fact that in a raster scanned television system a high degree of correlation exists both in the luminance and in the chrominance signals of a pair of adjacent lines. Because of this correlation, the difference between the luminance signals of the two lines is usually much smaller than luminance signal of either line alone, and requires less bandwidth. The present invention takes advantage of the natural correlation in a television picture in the horizontal and vertical directions for bandwidth reduction without significant impairment of the reproduced picture. This is accomplished by processing the television signal for bandwidth reduction in particular ways and transmitting it entirely in the analog domain. The bandwidth requirement is reduced for the transmission of the video signals over a transmission channel such as a cable television channel, a broadcast channel or a storage medium.

Abstract: A system is described which makes use of the fact that in a raster scanned television system a high degree of correlation exists both in the luminance and in the chrominance signals of a pair of adjacent lines. Because of this correlation, the difference between the luminance signals of the two lines is usually much smaller than the luminance signal of either line alone, and requires less bandwidth. A luminance carrier is amplitude modulated by the average value of two adjacent lines, while the phase of the carrier is modulated by the difference of two adjacent lines. The bandwidth of the resulting signal is comparable to that of a carrier that is amplitude modulated by a single raster line. Since two lines of information are being transmitted, however, it would be possible to take twice as much time to transmit them as when only a single line is being transmitted. Stretching the time axis in this way results in a factor of about two reduction in bandwidth.

Abstract: An inductive element of a multipole impedance transforming bandpass network of classical design such as Butterworth or Chebyshev, for example, is employed as a pick-up coil for sensing NMR signals. The network matches the high input impedance of an NMR receiver preamplifier to the low impedance of the pick-up coil. Simultaneously, and as a consequence of the impedance matching, the high preamplifier input impedance appears as a band width broadening element at the pick-up coil. By virtue of the multipole design of transformer, a bandwidth broader than the natural bandwidth of the pick-up coil is obtained and the transfer of the energy of the detected NMR signal to the preamplifier is maximized.

Abstract: A video processing system in which each field of image data is divided into rows and columns of blocks of picture elements. The number of blocks utilized is large enough so that when each block is considered to be a picture element, the blocks provide a reasonable raster for the peripheral vision aspect of the human visual perception system. The blocks of picture elements are transformed into blocks of spatial frequency components. The zero and low spatial frequency components of the blocks of spatial frequency transforms are updated at a sufficiently rapid rate to satisfy the requirements of the peripheral vision aspect of the human perception system. The higher spatial frequency components of the blocks of spatial frequency are updated at a lower rate corresponding to the rate at which the human perception system can respond to such information.

Abstract: A filter utilizing charge transfer devices for providing recursive transfer functions with a transmission zero at d.c. or zero frequency is described. The filter includes a circular charge transfer shift register having an even number N of stages, greater than two, and first, second, third and fourth linear charge transfer shift registers. All five shift registers are clocked at the same frequency. A first input sequence of packets of charge representing positive weight components of a signal, and a second sequence of packets of charge representing negative weight components of the signal are provided. Means are provided for dividing each of the packets of charge of the first input sequence into a first part and a second part and for applying each of the first parts of the packets of the first input sequence to the input stage of the first shift register and for applying each of the second parts of the packets of the first input sequence to the input stage of the second shift register.

Abstract: A filter is described utilizing charge transfer devices for implementing transmission zeros. A first shift register is provided having a plurality of M stages, where M is an integer, each stage including a respective first charge storage region. A second shift register is provided having a plurality of N stages where N is an integer greater than M, each stage including a respective first charge storage region. A first sequence of packets of charge is provided, each packet representing a respective sample of an input signal. Each of the packets of charge of the sequence is divided into a first part and a second part equal to the first part. Each of the first parts of the packets of the first sequence is applied to the first shift register and transferred from stage to stage thereof at one frequency. Each of the second parts of the packets of the first sequence is applied to the second shift register and transferred from stage to stage thereof at the aforementioned one frequency.

Abstract: A charge transfer filter utilizing a charge transfer accumulator structure for exponential smoothing of sampled data signals is described. The charge transfer accumulator structure performs charge equilibration at high speed thereby enabling an exponential decay impulse response to be obtained at high speed.

Abstract: A filter is described utilizing charge transfer devices for providing exponential smoothing of sampled data signals with a transmission zero at a predetermined frequency. A first shift register is provided having N serially coupled stages to each of which is coupled a respective accumulator stage. A second shift register is provided having N serially coupled stages. A sequence of packets of charge is provided, each packet representing a respective sample of an input signal. Each packet of the sequence is divided into a first part and a second part, the ratio of the first part to the second part being equal to a first fixed value. Each of the first parts of the packets of the sequence is applied to the first shift register and is sequentially processed in successive stages thereof to provide an output. Each of the second parts of the packets of the sequence is applied to the second shift register and transferred from stage to stage to provide another output.

Abstract: A charge transfer device is described which includes a plurality of charge transfer channels or shift registers, each having at least two sections operable at two different clock frequencies to provide variable non-symmetrical time delays in the channels and which may be operated with another identical charge transfer device to provide the functional equivalence of a single charge transfer device having twice as many channels and providing symmetrical time delays in the channels.

Abstract: A filter utilizing charge transfer devices for providing recursive transfer functions is described. The filter includes a circular charge transfer shift register having an even number N of stages, greater than two, and first and second linear charge transfer shift registers. A composite stage of the first linear shift register is coupled to the N.sup.th stage of the circular shift register through a first gating means. A composite stage of the second shift register is coupled to the ##EQU1## stage of the circular shift register through a second gating means. A first sequence of packets of charge is applied to the first shift register, and a second sequence of packets is applied to the second shift register. All three shift registers are clocked at the same frequency. At the end of each clocking cycle the first gating means is operative to combine the charge stored in the N.sup.

Abstract: A sampled data transversal filter utilizing charge transfer devices is described. The filter includes a charge transfer shift register including a plurality of stages to which a sequence of packets of charge representing samples of a signal is serially applied and clocked from stage to stage. Charge division and collection means are provided at the various stages of the shift register to divide and collect the fractions of charge appearing in the various stages thereof. These fractions represent the weighting coefficients of the various stages of the shift register. The charge collection means of the various stages are connected together to provide an output representing the sum of the charges collected at the various stages. The output sequence of packets of charge obtained represent the convolution of the input sequence of packets with the weighting coefficients of the various stages of the shift register.