Automatic quadrature and amplitude stabilizer

Claim 1

A quadrature stabilizer network adapted for receiving two periodic input signals and providing two quadrature related output signals comprising, in combination: input terminal means for receiving a pair of periodic input signals, a first signal of said pair having a phase differential relative to the second signal of said pair; adder means for receiving said second signal and a percentage of said first signal, the adder issuing a third signal comprising components of both said first and second signals; phase detector means receiving said third signal and said first signal, the detector means issuing a command signal indicative of the undesired portion of said first signal within said third signal; controller means responsive to the command signal and controlling the percentage of said first signal provided to the adder means; output terminal means connected to receive the first input signal and the third signal and issuing first and second output signals in response thereto; a pair of amplitude stabilizers for sensing and controlling the amplitude of the first and second output signals with respect to an external amplitude control reference source, a first of said stabilizers connected to receive the first signal and a reference signal from said source, and a second of said stabilizers connected to said adder means to receive the third signal and the reference signal from said source, differential comparator means associated with each each said stabilizer, sampling means connected to receive said first and second output signals and having outputs individually issuing the sampled levels of each such signal, the comparator means associated with the first stabilizer connected to receive the reference signal and connected to the output of said sampling means to receive the sampled level of the first output signal, and thE comparator means associated with the second stabilizer connected to receive the reference signal and connected to the output of said sampling means to receive the sampled level of said second output signal, each said comparator means having an output issuing a signal representing an amplitude difference between the reference signal and the respective sampled signal levels; and multiplier means connecting said first input signal and the third signal to said output terminal means for providing said first and second output signals and said multiplier means being connected to the outputs of said comparator means for adjusting the amplitudes of said output signals in response to the amplitude difference signals.