Third harmonic signal generator
AssigneeRCA Corporation
InventorLeopold Albert Harwood
Life of this patent
Estimating the term…
Abstract
An integratable third harmonic signal generator includes a signal multiplier coupled to a source of alternating input signal, for providing a first output signal proportional to the input signal raised to the third power. The first output signal includes a first harmonic component and a third harmonic component each proportional to the input signal. Means are also included for deriving, from the input signal, a second output signal in predetermined magnitude and polarity relation with the first harmonic component. The first and second output signals are combined to cancel the first harmonic component and thereby provide a third output signal proportional to the third harmonic component of the input signal substantially devoid of any first harmonic component.
Claims16
A third harmonic signal generator comprising:
- means for providing an alternating input signal;
- signal multiplier means coupled to said input signal means, for providing a first output signal proportional to said input signal raised to the third power, said first output signal having a first harmonic component proportional to said input signal and having a third harmonic component proportional to said input signal;
- means responsive to said input signal for providing a second output signal in predetermined magnitude and polarity relation with said first harmonic component;
- and
- means for combining said first and second output signals to cancel said first harmonic component and thereby provide a third output signal proportional to said third harmonic component and substantially devoid of said first harmonic component.
A third harmonic signal generator circuit comprising:
- a source of alternating input signals proportional to sin .theta.;
- a first signal multiplier comprising a first amplifier having input and common electrodes coupled to said source, and an output electrode, for providing a first output signal proportional to sin.sup.2 .theta.;
- a second signal multiplier comprising a second amplifier having an input electrode coupled to said output electrode of said first amplifier, a common electrode coupled to said source, and an output electrode, for providing a second output signal proportional to sin.sup.3 .theta. having a first harmonic component proportional to sin .theta. and a third harmonic component proportional to sin .theta.;
- a third amplifier having an input electrode coupled to said source, a common electrode and an output electrode, for providing a third output signal in predetermined magnitude and polarity relation with said first harmonic component sin .theta.;
- and
- a combining network coupled to said outputs of said second and third amplifiers, for combining said second and third output signals to cancel said first harmonic component of said second signal and thereby provide an output signal proportional to said third harmonic component sin 3.theta. and substantially devoid of said first harmonic component.
Dependencies are inferred from the claim text.