Patent US3710249A successfully refreshed from Google Patents.
US3710249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slideback peak circuits with constant tone indications
Assignee: Singer Co
•
Filing: 1971-05-06
•
Granted: 1973-01-09
•
Expires: 1991-05-06
Abstract
Abstract A peak detector measuring apparatus having an audio output tone which is abruptly cut-off when a DC voltage is manually adjusted to be equal to the peak value of an input signal voltage wave. The apparatus is suitable to measure the peak value of unmodulated signals, amplitude modulated signals, and pulse modulated signals having relatively narrow pulse widths and relatively low repetition rates.
Inventors
- 👤 N Kadar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:24
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
171 words
An apparatus for measuring the peak value of an AC voltage comprising: a. an adjustable DC voltage; b. comparator means for comparing the peak value of said AC voltage wave with said adjustable DC voltage, said comparator means providing a first output voltage level when the peak value of said AC voltage wave exceeds said adjustable DC voltage and a second output voltage level when the peak value of said AC voltage wave is less than said adjustable DC voltage; c. oscillator means for providing an audio voltage to activate a transducer; d. gating means coupled to said oscillator means for starting and stopping said oscillator means; said oscillator means being started at said first output voltage level and stopped at said second output voltage level; e. pulse stretching means coupled between said comparator means and said gating means for stretching said first output voltage level and, f. indicating means coupled to said adjustable DC voltage for indicating the value of said adjustable DC voltage when said oscillator means is stopped.
Claim 2
Independent Claim
171 words
An apparatus for measuring the peak value of an AC voltage comprising: a. an adjustable DC voltage; b. comparator means for comparing the peak value of said AC voltage wave with said adjustable DC voltage, said comparator means providing a first output voltage level when the peak value of said AC voltage wave exceeds said adjustable DC voltage and a second output voltage level when the peak value of said AC voltage wave is less than said adjustable DC voltage; c. oscillator means for providing an audio voltage to activate a transducer; d. gating means coupled to said oscillator means for starting and stopping said oscillator means; said oscillator means being started at said first output voltage level and stopped at said second output voltage level; e. pulse stretching means coupled between said comparator means and said gating means for stretching said first output voltage level and, f. indicating means coupled to said adjustable DC voltage for indicating the value of said adjustable DC voltage when said oscillator means is stopped.
Claim 3
Dependent Claim
44 words
An apparatus for measuring the peak value of an AC voltage wave according to claim 1 wherein said comparator means comprises a differential operational amplifier and said pulse stretching means comprises a diode coupled in series with a resistor and capacitor connected in parallel.
Claim 4
Independent Claim
170 words
An apparatus for measuring the peak value of an AC voltage wave comprising: a. a differential operational amplifier having first and second input terminals and an output terminal, said first input terminal having said AC voltage wave coupled thereto, said output terminal providing an output voltage proportional to the difference in voltage coupled to said first and second input terminals; b. an adjustable DC voltage, said adjustable DC voltage being coupled to said second input terminal of said differential amplifier; c. oscillator means for generating an audio voltage; d. gating means coupled to said oscillator means for starting and stopping said oscillator means; e. pulse stretching means coupled from said output terminal of said differential amplifier to said gating means for stretching the output voltage of said amplifier; f. utilization means coupled to the output of said oscillator means for converting said audio voltage to an aural tone; and, g. indicating means, coupled to said adjustable DC voltage for indicating the value of said voltage when said aural tone stops.
Claim 5
Independent Claim
170 words
An apparatus for measuring the peak value of an AC voltage wave comprising: a. a differential operational amplifier having first and second input terminals and an output terminal, said first input terminal having said AC voltage wave coupled thereto, said output terminal providing an output voltage proportional to the difference in voltage coupled to said first and second input terminals; b. an adjustable DC voltage, said adjustable DC voltage being coupled to said second input terminal of said differential amplifier; c. oscillator means for generating an audio voltage; d. gating means coupled to said oscillator means for starting and stopping said oscillator means; e. pulse stretching means coupled from said output terminal of said differential amplifier to said gating means for stretching the output voltage of said amplifier; f. utilization means coupled to the output of said oscillator means for converting said audio voltage to an aural tone; and, g. indicating means, coupled to said adjustable DC voltage for indicating the value of said voltage when said aural tone stops.
Claim 6
Independent Claim
107 words
A method for measuring the peak value of an electromagnetic interference wave comprising: a. receiving said electromagnetic interference wave; b. detecting said wave; c. comparing the detected wave with the value of an adjustable DC voltage in a comparator which provides an output voltage when said demodulated wave is greater in value than said adjustable DC voltage; d. stretching said comparator output voltage e. gating an audio oscillator means, which provides an audible tone by means of an amplifier and transducer, responsive to said output voltage; and, f. reading the value of the adjustable DC voltage on an indicating device at the point said audible tone ceases.
Claim 7
Independent Claim
107 words
A method for measuring the peak value of an electromagnetic interference wave comprising: a. receiving said electromagnetic interference wave; b. detecting said wave; c. comparing the detected wave with the value of an adjustable DC voltage in a comparator which provides an output voltage when said demodulated wave is greater in value than said adjustable DC voltage; d. stretching said comparator output voltage e. gating an audio oscillator means, which provides an audible tone by means of an amplifier and transducer, responsive to said output voltage; and, f. reading the value of the adjustable DC voltage on an indicating device at the point said audible tone ceases.
Claim 8
Dependent Claim
90 words
In an electromagnetic interference voltage measuring system which includes a slideback peak voltage circuit with adjustable DC voltage the improvement which comprises; oscillator means for providing an audible tone, pulse stretcher means responsive to the output of the slideback peak voltage circuit, and gating means responsive to the output of the pulse stretcher means, said gating means being coupled to said oscillator means for starting said oscillator means when said interference voltage exceeds said adjustable DC voltage and stopping said oscillator when said adjustable DC voltage exceeds said interference voltage.
Claim 9
Dependent Claim
90 words
In an electromagnetic interference voltage measuring system which includes a slideback peak voltage circuit with adjustable DC voltage the improvement which comprises; oscillator means for providing an audible tone, pulse stretcher means responsive to the output of the slideback peak voltage circuit, and gating means responsive to the output of the pulse stretcher means, said gating means being coupled to said oscillator means for starting said oscillator means when said interference voltage exceeds said adjustable DC voltage and stopping said oscillator when said adjustable DC voltage exceeds said interference voltage.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |