US3889136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal stripping circuit
Assignee: Spartanics Ltd
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Filing: 1973-06-29
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Granted: 1975-06-10
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Expires: 1993-06-29
Abstract
Abstract A circuit having a high gain, diode clamped capacitive input operational amplifier for stripping the highest frequency above a preset threshold level present in a complex signal wavetrain having more than one frequency component. Threshold level is established by varying amplifier gain and/or selection of diodes with particular junction potentials. When amplifier output exceeds the junction potential, a diode conducts to maintain the charge on the input coupling capacitor in substantially matching relationship with the incoming waveform.
Inventors
- 👤 William L Mohan
- 👤 Samuel P Willits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:04
CPC Classifications
G; G06; G06M; G06M9/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
100 words
A circuit for stripping the highest frequency above a preset threshold level present in a signal wave train having more than one frequency component comprising capacitive input coupling means, and non-linear clamping circuit means comprising a diode clamped operational amplifier having a preset threshold level and connected at its input to said capacitive input coupling means to maintain the charge thereon in substantially matching relationship with said highest frequency above said preset level, the output of said non-linear circuit means being a square wave indicative of said highest frequency above said preset threshold level present in said signal wave train.
Claim 2
Dependent Claim
100 words
A circuit for stripping the highest frequency above a preset threshold level present in a signal wave train having more than one frequency component comprising capacitive input coupling means, and non-linear clamping circuit means comprising a diode clamped operational amplifier having a preset threshold level and connected at its input to said capacitive input coupling means to maintain the charge thereon in substantially matching relationship with said highest frequency above said preset level, the output of said non-linear circuit means being a square wave indicative of said highest frequency above said preset threshold level present in said signal wave train.
Claim 3
Dependent Claim
33 words
A circuit for stripping the highest frequency in accord with claim 1 wherein said preset threshold level of said non-linear clamping circuit means is established by the amplifier gain and diode breakdown level.
Claim 4
Dependent Claim
35 words
A circuit for stripping the highest frequency present in a signal wave train having more than one frequency component in accord with claim 2 wherein said non-linear stripping circuit means threshold of clamping is adjustable.
Claim 5
Dependent Claim
96 words
A circuit for stripping the highest frequency component producing discrete slope reversals above a preset threshold level from a complex signal wave train having more than one frequency component producing slope reversals comprising capacitive input coupling means, and diode clamped high gain operational amplifier means connected at its input to said capacitive input coupling means and having selected gain and feedback breakdown conduction levels to establish said preset threshold level whereby the output thereof is a square wave indicative of the quantity of slope reversals produced by said highest frequency component above said preset threshold level.
Claim 6
Dependent Claim
96 words
A circuit for stripping the highest frequency component producing discrete slope reversals above a preset threshold level from a complex signal wave train having more than one frequency component producing slope reversals comprising capacitive input coupling means, and diode clamped high gain operational amplifier means connected at its input to said capacitive input coupling means and having selected gain and feedback breakdown conduction levels to establish said preset threshold level whereby the output thereof is a square wave indicative of the quantity of slope reversals produced by said highest frequency component above said preset threshold level.
Claim 7
Dependent Claim
105 words
A circuit for converting an input signal wave train comprising one or more frequency components of various relative variant amplitudes into a single frequency fixed amplitude wave train whose frequency is the highest frequency present in the incoming wave train that is above a preset threshold level comprising capacitive input coupling means, and clamping feedback diode means connected at its input to said capacitive input coupling and at its output to the output of a high gain negative feedback amplifier means, said preset threshold level being established by the gain of said negative feedback amplifier means and the breakdown conduction levels of said diode means.
Claim 8
Dependent Claim
105 words
A circuit for converting an input signal wave train comprising one or more frequency components of various relative variant amplitudes into a single frequency fixed amplitude wave train whose frequency is the highest frequency present in the incoming wave train that is above a preset threshold level comprising capacitive input coupling means, and clamping feedback diode means connected at its input to said capacitive input coupling and at its output to the output of a high gain negative feedback amplifier means, said preset threshold level being established by the gain of said negative feedback amplifier means and the breakdown conduction levels of said diode means.
Claim 9
Dependent Claim
16 words
A circuit in accordance with claim 5 wherein said converting circuit''s threshold of convErting is adjustable.
Claim 10
Independent Claim
96 words
The method of stripping the highest frequency signal component producing discrete slope reversals above a preset threshold level from a complex signal wave train having more than one frequency component producing slope reversals, comprising the steps of filtering said complex wave train to remove any steady state current therefrom, amplifying the varying current signal remaining after said filtering, and selectively feeding back current of a polarity and magnitude to equalize said varying current signal remaining whereby said highest frequency signal appears as a square wave and all frequency signals below said preset threshold level are eliminated.
Claim 11
Independent Claim
96 words
The method of stripping the highest frequency signal component producing discrete slope reversals above a preset threshold level from a complex signal wave train having more than one frequency component producing slope reversals, comprising the steps of filtering said complex wave train to remove any steady state current therefrom, amplifying the varying current signal remaining after said filtering, and selectively feeding back current of a polarity and magnitude to equalize said varying current signal remaining whereby said highest frequency signal appears as a square wave and all frequency signals below said preset threshold level are eliminated.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |