Harmonic generator
AssigneeThe United States of America as represented by the Secretary of the Army
InventorOtto E. Rittenbach
Life of this patent
Estimating the term…
Abstract
A harmonic frequency generator responsive to an input signal of frequency f hich changes slowly in both frequency and amplitude and characterized in that (1) the output signal (harmonic) amplitude remains proportional to the input signal amplitude and (2) the output frequency nf of the output signal consists soley of one integral (n>1) multiple of the input signal frequency.
Claims9
A harmonic generator responsive to an incoming signal which changes slowly in both frequency and amplitude comprising gain-controlled amplifier means receptive of said incoming signal and positioned in a feedback loop including a multiplier means,
- low pass filter means disposed in the output of said multiplier means for deriving bias control voltage signals for regulation of the gain of said amplifier;
- said multiplier means responding to output signals of said amplifier for providing multiplier output signals of amplitude proportional to the amplitude of said incoming signal and of a frequency which is double that of said incoming signal;
- high pass filter means in the output of said multiplier means for removing from the same multiplier means output signls, the d.c. component;
- addition and subtraction means for adding and subtracting of bias voltage before signals from the said means so as to decrease at maximum input voltage, the d.c. components of output.
A harmonic generator responsive to an incoming signal which changes slowly in both frequency and amplitude comprising gain-controlled amplifier means receptive of said incoming signals and positioned in a feedback loop including a two input multiplier means;
- low pass filter means disposed in the output of said multiplier means for driving bias control voltage signals for regulation of the gain of said amplifier;
- said multiplier means responding to output signals of said amplifier means for providing multiplier output signals of amplitude proportional to the amplitude of said incoming signal and of a frequency which is double that of said incoming signal;
- phase shifter means for, prior to the step of signals being passed through the multiplier means, introducing a phase shift between the signals at the two inputs to the said multiplier means.
A harmonic generator responsive to an incoming signal which changes slowly in both frequency and amplitude comprising first gain-controlled amplifier means receptive of said incoming signal and positioned in a feedback loop including a multiplier element means;
- low pass filter means disposed in the output of said multiplier element means for deriving bias control voltage signals for regulation of the gain of said first amplifier means;
- second adjustable gain amplifier means to which quadrature input signals are applied from an outside source for producing signals for application to the said multiplier element means;
- said multiplier element means responding to output signals of said first and second amplifier means for providing output signals of amplitude proportional to the amplitude of said incoming signal and of a frequency which is double that of said incoming signal.
Dependencies are inferred from the claim text.