US4398153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Harmonic generator
Assignee: United States Department of the Army
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Filing: 1981-05-06
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Granted: 1983-08-09
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Expires: 2001-05-06
Abstract
Abstract A harmonic frequency generator responsive to an input signal of frequency fhich 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.
Inventors
- 👤 Otto E. Rittenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:28
CPC Classifications
H; H03; H03B; H03B19/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
151 words
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.
Claim 2
Dependent Claim
151 words
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.
Claim 3
Dependent Claim
133 words
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.
Claim 4
Dependent Claim
133 words
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.
Claim 5
Dependent Claim
134 words
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.
Claim 6
Dependent Claim
134 words
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.
Claim 7
Dependent Claim
24 words
A generator as in claim 1 wherein the frequency of the output signals from said multiplier means is quadruple that of said incoming signal.
Claim 8
Dependent Claim
24 words
A generator as in claim 2 wherein the frequency of the output signals from said multiplier means is quadruple that of said incoming signal.
Claim 9
Dependent Claim
24 words
A generator as in claim 3 wherein the frequency of the output signals from said multiplier means is quadruple that of said incoming signal.
Claim 10
Dependent Claim
24 words
A generator as in claim 2 wherein the frequency of the output signals from said multiplier means is triple that of said incoming signal.
Claim 11
Dependent Claim
24 words
A generator as in claim 3 wherein the frequency of the output signals from said multiplier means is triple that of said incoming signal.
Claim 12
Dependent Claim
15 words
A generator as in claim 1 wherein said multiplier means is a squarer element means.
References Cited (Backward Citations)
US3402360A
Cited
US3533010A
Cited
US3571627A
Cited
US3706048A
Cited
US3944945A
Cited
US3979693A
Cited
US4213097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |