Abstract: A continuously tunable function generator comprises a first function generator (10) with a triangle voltage generator including a comparator (24), which controls the commutation of a capacitor (14) from a charging phase to a discharging phase and vice versa in relation to an upper and lower preset amplitude value of the voltage at the capacitor (14). The triangle voltage (50) arising at the capacitor (14) is supplied to a second comparator (32) of another triangle voltage generator. The second comparator (32), commutates a second capacitor (38) of the same capacitance as the first capacitor from the charging phase to the discharging phase and vice versa. A reference voltage corresponding to the mean value of the upper and the lower amplitude value is applied to a second input of the second comparator. The charging currents and the discharging currents are identical, constant, and adjustable for changing the frequency of the triangle voltages.

Abstract: A frequency synthesizer circuit of the phase-locked loop type for receiving a reference signal and generating in response thereto a plurality of local oscillator (LO) output signals is provided. The synthesizer includes a varactor-controlled oscillator having one or more hyperabrupt varactor tuning diodes for providing an octave bandwidth phase-locked loop output RF, and a plurality of series-connected emitter-coupled logic (ECL) circuits connected to the output of the varactor-controlled oscillator for generating a plurality of local oscillator output signals RF/N, where N=2.sup.x, x=1, 2, 3 . . . . The frequency synthesizer also includes a programmable frequency divider in the feedback loop thereof for reducing the frequency of the phase-locked loop output signal RF by a selectable factor.

Abstract: A push-pull microwave oscillator circuit, including two transistors, for producing the second harmonic of a fundamental frequency at a symmetry point of the circuit which is connected to the bases of the transistors through identical arrangements of circuit elements. The circuit includes tuning means coupled to at least one of the transistors, an output and an input. The output, which is utilized to provide to a phase comparison means an output signal at the fundamental of the second harmonic frequency, is coupled to the base of at least one of the transistors by a capacitive impedance. The input, which is utilized to receive a tuning signal produced by the phase comparison means in response to the output signal, is coupled to the tuning means.

Abstract: A system for communicating a time reference or clock signal to a plurality of processors over substantial distances where propagation time between units is significant compared to the processing time. The timing signal is in the form of two continuous sinusoidal waves of different frequency but equal amplitude, which are added to give equal contributions in the resultant composite, two frequency, sum signal. The resulting waveform has sharply defined nulls occurring at the difference frequency which are used as a precise time reference.

Abstract: The output from a first variable frequency oscillator is frequency divided by a variable frequency divider and the frequency-divided output is phase compared by a first phase comparator with a first reference signal. By the phase-compared output is controlled a second variable-frequency oscillator of higher frequency stability than that of the first variable frequency oscillator. The output from the first variable oscillator is frequency divided by another frequency divider and the frequency-divided output is phase compared by a second phase comparator on the basis of the output from the second variable frequency oscillator and, by the phase-compared output, the first variable frequency oscillator is controlled. By changing the frequency dividing ratio of the variable frequency divider, the oscillation frequency of the first variable frequency oscillator is set.

Abstract: The microwave oscillator, including a transistor (1), e.g. a field-effect transistor, includes a first resonating circuit (2) connected to a first terminal and a second resonating circuit (3) connected to a second terminal of said transistor, each resonating circuit including a microstrip (4,6), to which is coupled a dielectric resonator 5,7, both resonators of both resonating circuits being similar and operating at the same resonating frequency, third terminal of said transistor defining a power output. The oscillator provides two outputs of lower power but with a high Q.sub.ext, and an output of higher power with a medium Q.sub.ext.

Abstract: An oscillator circuit for simultaneously outputting two frequency signals comprises a single resonator vibrating in two modes at different frequencies, an amplitude modulating circuit for modulating one of said two frequencies with a third frequency, a feedback circuit receiving the output of the amplitude modulating circuit, a detector demodulating the amplitude modulated signal, the demodulated signal being the third frequency used to modulate the output of the resonator. The two frequencies of the resonator are close together in value and the third frequency signal is the difference in frequency of the two resonator outputs. Circuit outputs are one resonator frequency and the difference frequency.

Abstract: Stabilization of an oscillator, particularly an RF oscillator, is achieved by an arrangement employing a fiber optic delay line. The delay line has a Q defined by the relationship Q=2.pi.f.tau., where f is the oscillator operation frequency and .tau. is the length of the delay line. Opto/electronic and electro optic transducers are coupled between the electrical oscillator circuitry and the optical delay line for interfacing the electrical section of the RF oscillator with its optical section. This optic delay line may be configured as a single optical fiber where a single output frequency is desired, or it may be configured of a plurality of optical fibers of respectively different lengths, where plural output frequencies are to be produced.

Abstract: An oscillating circuit provides first and second reference signals having a phase difference of 90.degree. with respect to each other. The oscillating circuit includes an oscillator providing the first reference signal at an output thereof, a voltage-to-current converting circuit, which may incorporate a common-base transistor, and a capacitor connected between the output of the oscillator and an input of the converting circuit. The output of the converting circuit then provides the second reference signal which differs in phase by 90.degree. from the first reference signal. The oscillator may include differentially connected transistors and an LC resonant circuit.

Abstract: A digitally controlled oscillator is provided with a memory, storing the half periods T.sub.i (i=1, 2, ..., n) of corresponding frequencies f.sub.i =1/(2T.sub.i) to be generated, and with a digital feedback circuit, in which circuit the half periods taken from memory are decreased by a fixed time value .tau. on a time sharing basis, and in which circuit, as soon as the residual values .DELTA..sub.i,1 =T.sub.i -k.sub.i,1 .tau.<.tau. are obtained, these residual values are increased by the corresponding half periods T.sub.i also on a time sharing basis, and each value so increased is repeatedly decreased by the fixed time .tau.. On repeating this process j times, the residual values can be expressed by: .DELTA..sub.i,j =T.sub.i +.DELTA..sub.i,j-1 -k.sub.i,j .tau., where each k.sub.i,j is so large that 0.ltoreq..DELTA..sub.i,j <.tau.. The digital feedback circuit is connected to n residual value counters, which are each supplied with a series of residual values .DELTA..sub.

Abstract: In an induction energy transfer device comprising a static power conversion circuit for producing an alternating magnetic field of ultrasonic frequency of the type wherein the static power conversion circuit includes a parallel resonant circuit which comprises a coil which also couples power across an air gap, an improvement in efficiency and power transfer is obtained by including at least two such parallel resonant circuits in the power conversion circuit, one of which resonant circuits is tuned to the third harmonic of said fundamental frequency.

Abstract: A combined encoder and decoder circuit which uses a single frequency selective resonant reed in a closed loop oscillator configuraion permitting simultaneous encoder and decoder operation. A closed loop oscillator has a resonant reed connected in series between an input and output terminal and produces a signal at the resonant frequency of the reed. Positive signal feedback from the output to input terminal is provided by an amplifier, operated between saturation and cut-off, and a controllable attenuator. A level detector and the attenuator effectively form a limited range negative feedback loop which effectively maintains the signal magnitude at the output terminal at a substantially constant level.

Abstract: A two phase clock signal with separation between the two phases is produced from a single phase clock. Two complementary input signals are derived from the single phase clock and are transferred by separate transfer gates to individual push/pull amplifiers. Each gated input signal is applied to the first input of one of the amplifiers while the complementary input signals are connected directly to the second input of the amplifiers. The output of each push/pull amplifier is one of the clock phases, and each is also applied to a sensing circuit. The sensing circuit produces delayed outputs which are cross-coupled to control the transfer gate associated with the other output phase. By judicious selection of the parameters of the sensing circuit, the time and speed of "turn-on" for each transfer gate can be controlled. Accordingly, the separation between the two clock phases as well as the shape of each can be selected.