In the phase converter disclosed, a rotating machine has a stator winding connected at suitable terminals to a multiphase system with a plurality of lines and a single-phase system composed of one of the multiphase lines and a single-phase line. In the machine, a rotor in the form of a squirrel cage winding coacts with the stator voltages to produce unsymmetrical electromotive forces in the multiphase systems. An auxiliary voltage source having a continuously variable magnitude and phase, and co...

A device is disclosed for converting single-phase power to three-phase power. The device includes an autotransformer and a variable impedance device for adjusting the magnitude and phase of the autotransformer output. A first regulator circuit, including comparison, amplifier, phase shifting and SCR stages, is provided to regulate the impedance of the variable impedance device. A second regulator circuit, including comparison, control and power output stages, is also included to provide the devi...

The signal to be corrected in phase is applied in phase quadrature to a first channel comprising a linear attenuator and to a second channel comprising two diodes connected in parallel and in reverse directions as concerns the input a-c current of this channel and in series as far as the bias is concerned, the two diodes receiving from a source the same bias voltage. The output signals from the two channels are added in an adder. The present invention relates to phase-correctors, in particular a...

An apparatus is disclosed for producing an output signal as a function of the phase difference between two input signals of the same frequency. A signal generator is responsive to one of the input signals to produce a ramp function signal having a zero magnitude located approximately in the center of said ramp function. A first sample circuit samples the ramp function in response to the first input signal to produce a control signal. A control circuit is responsive to the control signal and conn...

A phase detector is disclosed, which is constructed such that a television signal including chrominance signal and color burst signal and a local color subcarrier signal are phase compared to each other by a differential amplifier of transistors. The emitter connected in common of the differential amplifier transistors are connected to a gating circuit, which is on-off controlled such that it is open only during the period of presence of the color burst signal in the television signal. A detecti...

An improved circuit having both frequency discriminator and phase detector functions is disclosed. The circuit functions as a frequency discriminator for signals relatively far removed from a predetermined acquisition frequency range, thereby providing a coarse lock-on for acquisition. After acquisition the circuit functions as a phase detector for phase lock purposes. Thus, the discatector or dual function discriminator-phase detector eliminates the requirement for sweeping or presetting a volt...

A phase synchronizer for obtaining a signal which is phase synchronized with respect to another signal which has passed through a transmission system after originating at a signal source, the phase synchronizer comprising a variable phase shifter responsive to the output signal of the signal source for shifting the phase thereof in response to a control signal applied thereto; a phase comparator responsive to the signal which has passed through the transmission system and the output signal of th...

A phase shifter comprises a segment of transmission line and a reentrant transmission path segment. Each phase shift "bit" utilizes only a pair of diodes to switch in a transmission path which provides the desired phase shift. The phase shifter is of relatively small size and is relatively inexpensive.

A phase shifter comprises a transmission line having a second terminated transmission line extending therefrom. A single diode is coupled across the second transmission line. The diode is switched between two operating states which changes the effective electrical length of the second transmission line and introduces a phase shift to a signal propagating in the first transmission line.

In a magnetic tape recording/playback system, there has here been provided a phase sensor circuit wherein a recorded square wave signal, when played back, produces a signal which includes a predominant first and third harmonic. A filtered sample of the relative amplitude of the resulting peaks is compared and a difference signal is indicative of a phase shift error. That signal may then be used to effect a control to correct the phase shift error.