A novel phase control circuit provides wider control range and a greater percentage of power delivered by synchronous switching of a triggering circuit through a unique notched square wave signal. The output of a triggering circuit is then used to actuate a power device in synchronized phased relationship with an AC supply voltage.

A phase locked loop circuit employing a first edge detector consisting of an exclusive OR gate and flip flop circuit feeding by way of a NAND gate, an up counter and a second edge detector of like kind feeding also by way of a NAND gate into a down counter. Both counters feed into an added which provides a signal to a decoder representing the phase difference between the input phase and the output phase signal. The phase processing system provides positive rapid pull-in over the entire frequency...

The invention relates to a phase comparator making it possible to measure the phase displacement between several very high stability oscillators and having for this purpose a system of pairs of measuring cascades each being connected to an oscillator and supplying a first and a second signal. It also comprises a multiplexer, a counting circuit, a computer and a computer coupler making it possible to compare the first signals in pairs in order to obtain a measuring range in which is located the p...

A phase detector for detecting in real time the difference in phase between frequency pulse signals and data pulse signals, including a control signal generator for generating control signals corresponding to the occurrence of the frequency pulse signals and the occurrence or non-occurrence of the data pulse signals, and a circuit, operative during the occurrence or non-occurrence of the data pulse signals, for producing a phase error signal indicating differences between the real time occurrenc...

A phase detector for monitoring the presence, sequence and polarity of each phase line for a three-phase power input and indicating when a phase is missing or out of sequence.

A phase shifter includes first and second mixers which mix a first signal with a second signal having a phase different from the first signal, respectively, third and fourth mixers which mix the second signal with the output signals of the first and second mixers and a combiner which combines the output signals of the third and fourth mixers to produce an output signal having a phase which is inverted with respect to the first signal.

In-phase (I) and quadrature-phase (Q) signals are corrected for both amplitude and phase imbalances by passing the I and Q signals successively through a first amplitude correction stage, a sum-difference stage, and a second amplitude correction stage. The first amplitude correction stage balances the signal levels of the I and Q signals. The sum-difference stage produce a sum of the input I and Q signals, and a difference of the input I and Q signals, resulting in ideal quadrature in the output...

A phase detector is provided for detecting the phase difference between a first input signal and a second input signal and providing an output corresponding thereto. The phase detector comprises a dual state phase detector, a tri-state phase detector, a control input for receiving a control signal, and a control circuit for selecting either the dual state phase detector or tri-state phase detector. The dual state phase detector compares the phase difference between the first input signal and the...

The subject disclosure relates to novel and improved apparatus for detecting and nulling the difference in phase between a pair of electrical operational channels. The apparatus includes a signal generator which applies a test signal to each operational channel, a phase detector coupled to the output of the channels, an analog to digital converter that converts the detected phase difference into a count in and up and down counter circuit and switching devices that in response to the output of th...

A pair of tuned lines are coupled to a carrier signal source and a load through a quarter-wave coupler. The electrical length of the lines are electrically altered to phase modulate the carrier supplied by the source through the coupler to the load. Varactor diodes and a variable inductance in each of the lines vary the line electrical lengths such that there is a linear modulation of the carrier. The arrangement is such that the energy reflected from the two lines have phases opposing at the so...