Abstract: A remote control unit for a television or video tape recorder has a minimal number of keys to simplify use of the control unit. The unit is shaped having a rounded bottom and is weighted toward that bottom, so that the remote control unit will stand upright even if momentarily tipped over. The remote control unit includes a programmable read-only memory, so that it can control various units such as a television, video tape recorder, compact audio disc player, and the like. The rounded bottom is attached to the main body of the remote control unit in a rotary fashion so that the bottom may be rotated to select different functions, such as the television or video tape recorder to be controlled.

Abstract: A cardiac monitoring system includes an acquisition module for acquiring a plurality of analog cardiac signals through leads connected to predetermined locations on the body of a patient and for converting the cardiac signals to twelve standardized ECG lead signals. An arrhythmia monitor analyzes a plurality of the ECG signals for determining the existence of rhythm abnormalities and a twelve lead analyzer analyzes both the rhythm and the contours of all of the ECG lead signals for rhythming conduction, infarction, hypertrophy and repolarization abnormalities. The arrhythmia monitor and the twelve lead analyzers are operated concurrently for the simultaneous analysis of the ECG signals so that the occurrence of a rhythm abnormality and its cause can be determined on a real time basis.

Abstract: An inductive amplifier for identifying and tracing wires is provided with a pair of threaded post terminals for being engaged by the electrical clips of a jumper wire or telecommunications butt set. The inductive amplifier includes a built-in speaker and a depressible power switch for applying power from a battery to a tone amplifier. A switching transistor couples the battery to the tone amplifier whenever a low impedance path is formed between the pair of threaded post terminals, even if the power switch is not depressed. The built-in speaker is connected in series with the threaded post terminals and is a.c. coupled to the tone amplifier for sounding the tone through either the built-in speaker or through a butt set engaged with the threaded post terminals. The impedance of the built-in speaker is selected to be less than that of the butt set for silencing the built-in speaker when the butt set is connected.

Abstract: An output buffer comprises a reference circuit having a plurality of reference transistors connected in parallel to each other and a output driver circuit having a corresponding plurality of driver transistors connected in parallel with each other. The reference transistors and the driver transistors both have varying widths with the widths of the reference transistors being a binary fraction, for instance one fourth, smaller than the widths of the corresponding output driver transistors. The transistors in the reference circuit are selectively conducted in order to match an impedance of the reference transistors to the impedance of a user selected resistor, representing a fraction of the impedance of a transmission line. The selection of the reference transistors also determines the selection of the driver transistors and consequently causes the impedance of the output driver to match the impedance of the transmission line.

Abstract: An N-way power divider/combiner having isolated outputs using printed circuit board geometry that forms a ring of power resistors and output tramsmission lines spiraling around the ring to reduce the size of the circuit is disclosed. Both sides of the printed circuit board are used to achieve further size advantages. The invention thus provides a high-power radio frequency divider/combiner circuit that is much smaller than previous circuits that are able to handle equivalent power levels.

Abstract: In accordance with the present invention, a method of electrophotographically manufacturing a luminescent screen assembly on an interior surface of a faceplate panel 12 of a color CRT 10 comprises the steps of coating the interior surface of the panel with a volatilizable, organic conductive material to form an organic conductive (OC) layer 32, and overcoating the OC layer 32 with a volatilizable, photoconductive material to form an organic photoconductive (OPC) layer 34. Then, a substantially uniform voltage is established on the OPC layer 34, and selected areas of the OPC layer 34 are exposed to visible light to affect the voltage thereon, without affecting the voltage on the unexposed area of the OPC layer 34. Next, triboelectrically charged, light-absorbing screen structure material is deposited onto the unexposed area of the OPC layer 34 to form a substantially continuous matrix 23 of light-absorbing material having open areas therein.

Abstract: A low power consumption BPSK modulator uses only one center-tapped transformer and a single-pole double-throw (SPDT) switching arrangement including four field effect transistors and a pair of termination resistors. An advantage of the subject invention is that the DC switching current is reduced by a factor of approximately 1500 with respect to a conventional diode ring modulator. An extremely important advantage of the subject invention in the field of handheld battery-powered communications equipment is that the subject apparatus can be made relatively small due to the necessity for only one transformer.

Abstract: This invention relates to electrodeposited copper foil having an elongation measured at 180.degree. C. in excess of about 5.5%, an ultimate tensile strength measured at 23.degree. C. in excess of about 60,000 psi, and a matte-side R.sub.tm in the range of about 4.5 to about 18 .mu.m. This invention also relates to a process for making electrodeposited copper foil which comprises: preparing a copper deposition bath comprising water, copper ions and sulfate ions, said bath containing less than about 20 ppm chloride ions; and applying electric current to said bath to electrodeposit copper from said bath using a current density in the range of about 200 to about 3000 amps per square foot.

Abstract: An integrated circuit package including a heat sink is disclosed. The package incorporates an sealing (or locking) ring located circumferentially around the heat sink to provide a better seal between the encapsulant and heat sink and to reduce the possibility that contaminants from outside the package will reach the interior semiconductor die. A stress relief section is formed in the package leads and a dielectric adhesive material is used to attach the package leads to a heat sink surface. The dielectric adhesive creates a secure bond between leads and heat sink, allows heat transfer from the leads to the heat sink, and prevents shorting of the leads to the heat sink.

Abstract: Apparatus in accordance with the subject invention controls a cable box (i.e., the source of its own video input signals), and monitors the television signals received from the cable box, in a "closed loop" manner. By monitoring an appropriate signal the controller of the VCR can detect perturbations of signal level which indicate that the cable box has changed channels. It is herein recognized that such an appropriate signal can be taken across the filter capacitor of a either sync or AGC portions of a video processor of the VCR.

Abstract: A low power consumption BPSK modulator uses only a single input transformer which is not required to be center-tapped, and a switching arrangement including four junction field effect transistors. An advantage of the subject invention is that the DC switching current is reduced by a factor of approximately 1500 with respect to a conventional diode ring modulator. The carrier signal loss of the subject apparatus is lower than that exhibited by a ring modulator due to the use of only a single transformer, and due to the low on-resistance of the JFETs. An extremely important advantage of the subject invention in the field of cordless telephone handsets is that the subject apparatus can be made relatively small due to the necessity for only one transformer.

Abstract: In accordance with the present invention, a method of electrophotographically manufacturing a luminescent screen assembly on a photoreceptor disposed on an interior surface of a faceplate panel for a color CRT includes the steps of: charging the photoreceptor to establish a substantially uniform electrostatic voltage thereon; positioning the panel on an exposure device having a light source therein; exposing selected areas of the photoreceptor to visible light from the light source to affect the voltage thereon, without affecting the voltage on the unexposed area of the photoreceptor; and depositing a triboelectrically charged, first color-emitting phosphor onto the selected areas of the photoreceptor. The charging, positioning, exposing and depositing steps are repeated for a second and a third triboelectrically charged, color-emitting phosphor.

Abstract: A device for retaining an electronically readable card in an electronic device includes a substantially V-shaped resilient retainer dimensioned to engage a portion of the card while the rest of the card remains exposed for electronic reading purposes. The resilient retainer is held in the electronic device by a clip having a first detent member. The retainer includes a second detent member which engages the first detent member as the retainer enters the slit during insertion of the card into the electronic device. The thicknesses of the retainer and the card and the width of the slit are selected so that the resilient retainer is firmly held in the electronic device.

Abstract: A television receiver system having PIP capability includes two NTSC tuners and signal processing arrangements, and an HDTV tuner and signal processing arrangement. In order to accomplish a CHANNEL SWAP function, a controller searches a table for data indicative of pairing of NTSC channels and HDTV channels, the NTSC channel associated with the main channel HDTV source is tuned by the PIP NTSC tuner, and the HDTV channel associated with the PIP NTSC source is tuned by the HDTV tuner. If the inset image has no paired HDTV channel then the second NTSC tuner is controlled to select the channel formerly tuned by the PIP NTSC tuner.

Abstract: Disclosed is a mixer console which is capable of providing a mix-minus audio monitor signal to several locations from which an input audio signal is provided. The mix-minus audio signal consists of the sum of all active input channels except for the input channel to which the mix-minus audio signal is provided. Thus, the mix-minus signal permits monitoring without feedback or echo effects.

Abstract: A switched mode power supply includes a modulator s an input for receiving a sense signal and an output for developing a pulse modulated signal. An output switch is coupled to the modulator and is switched in accordance with the pulse modulated signal. A generator develops a supply voltage responsive to operation of the switch. A feedback circuit coupled between the modulator output and a modulator input limits the duty cycle of the pulse modulated signal.

Abstract: A discrete cosine transform engine is disclosed. The engine receives an input matrix of data and provides a transformed matrix of data, the input matrix and the output matrix each having a plurality of row locations and a plurality of column locations. The engine includes a plurality of input accumulators and a plurality of output accumulators. The plurality of input accumulators accumulate data from the input matrix of data in parallel to provide a plurality of transform coefficient outputs. A digital signal processor receives the plurality of transform coefficients, multiplies the transform coefficients by a plurality of transform constants and provides a plurality of transform products. Each output accumulator receives the transform products and accumulates the products to provide the transformed matrix of data.

Abstract: In a machine vision system, a pixel-discrimination threshold level, for determining whether pixels are to be assigned one or the other of two values, is established according to parameters obtained in an initialization procedure. During initialization, a test set of items is assembled and data is entered representing indicia appearing on each item of the test set. It is then determined, for each of a range of possible threshold levels, whether the machine vision system correctly recognizes the indicia on the respective test items. Based on the thresholds which permitted correct recognition, threshold parameters are calculated for each test item and average parameters are calculated from the test item parameters. The average parameters are used to set pixel-discrimination thresholds for subsequent recognition operations.