Phase shifter control circuit

DETAILED DESCRIPTION The foregoing difficulties are overcome according to the teachings of the present invention which provides a phase shift circuit controller permitting substantially instantaneous phase shifts in response to either a command signal or an error signal.
Essentially, the present invention provides a novel circuit for generating the applied phase controlling voltage in such a manner that whenever such voltage nears predetermined limits, usually upper or lower limits, signals are developed which, when combined with the normal input to such circuit, deliver a phase controlling voltage that is substantially instantaneously at the desired value; to thereby eliminate transitions through intermediate values.
An integrating circuit is provided to accommodate the normal fluctuations of the phase controlling voltage between the chosen predetermined limits; however, when the voltage reaches such limits a reset circuit is actuated which delivers a correction signal that when combined with the normal input signal to the integrator circuit and the output therefrom results in a phase controlling voltage that is immediately at the desired value.
Basically, then, the present invention provides a phase shifter control circuit, comprising; a first summing circuit for combining a normal input signal with a correction signal to produce an output signal representing the sum thereof, an integrator circuit responsive to such output signal for developing an integrated signal representing the time integral thereof and a second summing circuit for combining the integrated signal with the correction signal.