Abstract: A circuit is illustrated for performing an increment function wherein a savings of parts is obtained by using an inverter for two different functions thereby decreasing land area required for implementing the integrated circuit on a chip.

Abstract: A circuit is presented designed specifically for use in complementary symmetry design techniques such as CMOS/SOS wherein inverting gate types are a preferred design. This design is obtained with a minimum of delay by changing gate types in the ripple carry path wherein alternating stages utilize NAND gates with the remaining ripple carry path stages using NOR gates. To accomplish this approach, the bit stages of the word utilizing the NOR gates must have the bits inverted before being applied to the incrementing circuit.

Abstract: Apparatus is presented for logically combining two input signals in parallel operations to provide AND and OR as well as Exclusive OR outputs as part of the ALU function in a digital computer. The carry function is used in combination with the already generated signals of AND, OR and Exclusive OR to provide a carry output signal and a SUM signal through logic combining techniques. Thus, the entire ALU output is obtained in two stages of time delay and a great savings in components. In some computers, the outputs need to be passed through a four to one multiplexer to select the desired output.

Abstract: An apparatus is disclosed for establishing a reliable electrical connection with a diode. Contact with the diode is made by a conductor element which is generally cylindrical but also has a flared, conical portion. A biasing disc is provided which has a hole in the center and slits extending from the hole to form resilient leaf projections. The conductor element is assembled extending through the hole in the biasing disc, with the leaf projections deflected by the flared portion so as to resiliently press the conductor element against the diode.

Abstract: A synchronization system for data coupling apparatus is provided by delaying clocked frame identification signals instead of delaying the data in data buffer storage. Data is passed between input and output transmission lines with only the inherent delay incurred in the requisite data manipulation therebetween. The framing alignment information extracted at the input is connected to the output through a delay such that the data and framing identification signals arrive at the output at the same time and in synchronous alignment. In addition to eliminating the need for a data buffer, the system also eliminates the need for a second identification bit alignment location derivation from the output. The system utilizes an edge-aligned clock which enables substitutional insertion of data to a desired location in the bit stream.

Abstract: A variable inductance includes a coil and a moveable contactor which maintains continuous contact with the coil. An electrical connection, which is moveable along with the moveable contactor and away from a first end of the coil, connects the moveable contactor with further contact means positioned remote from the first end of the coil.

Abstract: A squelch circuit for a radio receiver provides for applying the audio signal that has been detected and demodulated to both a low pass channel and high pass channel. The low pass channel passes the audio signal to a low frequency bandpass filter where only the lower frequencies of the demodulated signal are passed. The filtered signal is then average by an averaging detector where the average of the energy contained within the signal is obtained and monitored by a syllabic detector, which upon the occurrence of certain pre-established varying energy levels will indicate the presence of speech in the demodulated signal.

Abstract: There is disclosed an automatic line buildout circuit which includes in its signal path two variable filters, each implemented by a transconductance operational amplifier circuit. Each filter exhibits a transfer function pole with a frequency which is directly related to a control current applied to that filter. At a point in the signal path after the two variable filters, there is a peak detector which provides an output level proportional to the peak amplitude of the signal in the path, and therefore proportional to the cable length. From the peak detector output level, there is derived for each of the variable filters a control current, related to the output level by a preselected function. For each variable filter, the associated function expresses the relation between cable length and the filter cutoff frequency which is required for proper equalization.

Abstract: As part of a moveable carriage assembly, a plurality of trolley wheels are capable of being driven, in worm-gear fashion, along a coil which is rotatable about its axis. One end of the coil is conductive and the other end of the coil is preferably non-conductive. A further part of the traveling carriage assembly electrically interconnects a conductive trolley wheel with an electrical contact situated remote from one end of the coil. Multiple conductive wheels are electrically interconnected.

Abstract: A muldem (100) has a monitor (101) which automatically sequentially tests data paths through the muldem for detection of malfunctions in the muldem. Standby data path protective switching means (108, 109) provides alternate data paths through the muldem in the event of a malfunction. The monitor may be manually overridden and locked to a specified data path for continued analysis of such path. Additionally, a selected path may be manually locked out from switching to standby. The monitor automatically checks before switching any data path to standby, to prevent a selected path from being switched, while permitting automatic protective switching of the other data paths.

Abstract: An AC to DC converter utilizes a first power converter for converting an AC signal to a DC signal under the control of a control signal. The control signal is generated by a control circuit that includes a first analog generator that provides a first signal that is analogous to the voltage of the AC signal that is to be converted. A second analog generator generates a second signal that is analogous to the current of the AC signal that is to be converted and a third analog generator generates a third signal that is analogous to the voltage of the DC output signal. The third signal and the first signal are multiplied together to obtain a fourth signal. The control signal is generated from the fourth signal and the second signal and is used to control the power converter such that the waveform of the current of the AC signal is limited to a sinusoidal waveform of the same frequency and phase as the AC signal.

Abstract: A collinear dual dipole antenna is split into two sections which are connected by a central conductor extending in spaced parallel relation within hollow support mast sections, and forming an effective transmission line providing RF continuity at a high band frequency f, and discontinuity at a low band frequency 1/2 f. The configuration provides a dual band antenna operating in either band from a single source without filtering and without modification of the antenna. In the high frequency band, the antenna operates as a dual dipole array. In the low frequency band, the antenna operates as a single dipole array with each mast section and its respective dipole acting as half of the single dipole array.

Abstract: Peak-limiting AGC for increased average power SSB transmission is improved by deriving a gain-control signal using Hilbert transform detection techniques to obtain a modulated envelope signal which is compared with a peak clipping reference to form the limiting gain-control signal.

Abstract: The present invention reduces the distortion components produced from high power level mixing through a set of adaptive cancelling circuits which utilize a low power level mixing of the same signals to provide a signal which is adaptively cancelled with a signal representative of the high power level signal including distortion to provide an output signal which comprises substantially only the distortion components found in the high power level signal. These distortion components are then adaptively cancelled or combined with the high power level signal including distortion to provide an output signal which comprises the primary signal and insignificant levels of noise and distortion.

Abstract: A corrugated feed horn and its method of manufacture is disclosed for circularly polarized SHF (super high frequency) and EHF (extra high frequency) parabolic antennas operating in the 12-100 GHz range. A plurality of laminations are dip braze bonded, providing alternate fins and grooves in an inner conical configuration. Extremely thin fins are enabled without expensive parts or fabrication methods.

Abstract: A plurality of moveable contactors may travel along a rotating coil, one end of which is conductive and the other end of which is non-conductive. Two or more electrically interconnected moveable contactors effect a shorting across unused electrical turns and thereby affect unused coil portion resonance. For tuning conditions where very little of the coil is unused, the non-conductive coil portion serves as a sidetrack onto which one or more contactors can move and acts as a mechanical storage or memory for preserving relative positions between contactors.

Abstract: An angle adaptor for use in effecting coplanar routing schemes with flat ribbon cables. A unitary planar guide member around which the flat ribbon cable is folded in a desired routing angle employs hingeable arms to secure the ribbon cable to the guide member near the edges where the ribbon cable approaches and exits the member. The edge around which the ribbon cable is folded is cross-sectionally configured to eliminate sharp creases in the cable and thereby minimize cable conductor stress.

Abstract: An audio signal tracking power converter has a master converter and a slave inverter which are connected in parallel to a dc power source that is to be converted and provide a first and second ac output signal. The first ac signal and the second ac signal are combined and converted to a dc signal that tracks the input audio signal. The master inverter is controlled by a free-running pulse generator which pulse-width modulates the first portion of the dc power that is converted to the first ac signal. The slave inverter is pulse-width modulated by pulses that result from the comparison of the audio signal that is to be tracked and a reference signal generated from the pulses from the free-running pulse generator.

Abstract: A mechanical bandpass filter of the cascaded flexure mode resonator bar type is provided with a coupling structure improving strength an reducing rigid-body spurious modes. Coupling wires are provided on both the top and bottom surfaces of the resonator bars, not just in a single plane.

Abstract: A circuit for measuring the Differential Absolute Delay Equalization between two data signals (each signal consisting of a data stream and its associated clock) is provided. The circuit generates an equalization error signal which is a composite of error signal and a pedestal voltage. The circuit also generates a replica of the pedestal voltage by taking the algebraic summation of the output of the comparison circuit and the complement of the output of the comparison circuit. The equalization error is the difference between the error signal and the replica pedestal voltage.