Patent US3736386A successfully refreshed from Google Patents.
US3736386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for sampling transmissions in telecommunication systems
Assignee: Pearson Electronics Inc
•
Filing: 1970-09-24
•
Granted: 1973-05-29
•
Expires: 1990-09-24
Abstract
Abstract A method of sampling transmissions in telecommunication systems including the steps of rectification and logarithmic amplification of the voltage present at a point in the system and application of such rectified and logarithmically amplified voltage to a linear voltage indicating device is disclosed. Apparatus for practicing the method and particular circuitry for use in such apparatus is described, which circuitry includes a half wave voltage rectifier circuit including a direct current feedback loop.
Inventors
- 👤 D Everton
- 👤 D Meacham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:03
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/46
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
177 words
Apparatus for sampling transmissions in a telecommunication system, said apparatus comprising impedance means having a given characteristic impedance, means for connecting said impedance means into said telecommunication system to develop a voltage thereacross, voltage rectifier means comprising an operational amplifier having an input and an output, means connecting said voltage developed across said given impedance means to said input of said operational amplifier, a pair of diodes connected with opposite polarity in parallel between said input and said output of said operational amplifier, a low pass filter network means comprising a pair of substantially non-capacitive impedances connected in series between said input and said output of said operational amplifier with a highly capacitive impedance connected from between said pair of impedances to ground, logarithmic voltage amplifier means having an input and an output, means connecting said output of said operational amplifier to said input of said logarithmic voltage amplifier means, a linear voltage indicating means having an input and means connecting said output of said logarithmic voltage amplifier to said input of said linear voltage indicating means.
Claim 2
Dependent Claim
177 words
Apparatus for sampling transmissions in a telecommunication system, said apparatus comprising impedance means having a given characteristic impedance, means for connecting said impedance means into said telecommunication system to develop a voltage thereacross, voltage rectifier means comprising an operational amplifier having an input and an output, means connecting said voltage developed across said given impedance means to said input of said operational amplifier, a pair of diodes connected with opposite polarity in parallel between said input and said output of said operational amplifier, a low pass filter network means comprising a pair of substantially non-capacitive impedances connected in series between said input and said output of said operational amplifier with a highly capacitive impedance connected from between said pair of impedances to ground, logarithmic voltage amplifier means having an input and an output, means connecting said output of said operational amplifier to said input of said logarithmic voltage amplifier means, a linear voltage indicating means having an input and means connecting said output of said logarithmic voltage amplifier to said input of said linear voltage indicating means.
Claim 3
Dependent Claim
30 words
Apparatus according to claim 1 wherein said means connecting said output of said logarithmic voltage amplifier means to said linear voltage indicating means includes a linear direct current voltage amplifier.
Claim 4
Dependent Claim
22 words
Apparatus according to claim 1 wherein said means connecting said voltage developed across said impedance includes a linear alternating current voltage amplifier.
Claim 5
Dependent Claim
15 words
Apparatus as claimed in claim 1 wherein said linear voltage indicating means is an ammeter.
Claim 6
Dependent Claim
41 words
Apparatus as claimed in claim 1 wherein said operational amplifier is a solid state integrated circuit, said diodes are solid state diodes and said pair of substantially non-capacitive impedances of said low pass filter network comprise a resistor and an inductor.
Claim 7
Dependent Claim
89 words
In apparatus for sampling transmissions in a telecommunication system, a circuit having an input terminal and an output terminal, said circuit comprising an operational amplifier connected between said input terminal and said output terminal, a pair of solid state diodes connected with opposite polarity and appropriate series impedance in parallel between said input terminal and said output terminal, and direct current feedback means connected between said input terminal and said output terminal, said direct current feedback means comprising inductance and resistance in series and high capacitance to ground therebetween.
Claim 8
Dependent Claim
89 words
In apparatus for sampling transmissions in a telecommunication system, a circuit having an input terminal and an output terminal, said circuit comprising an operational amplifier connected between said input terminal and said output terminal, a pair of solid state diodes connected with opposite polarity and appropriate series impedance in parallel between said input terminal and said output terminal, and direct current feedback means connected between said input terminal and said output terminal, said direct current feedback means comprising inductance and resistance in series and high capacitance to ground therebetween.
References Cited (Backward Citations)
US2264132A
Cited
US2313666A
Cited
US2324215A
Cited
US2861182A
Cited
US3237028A
Cited
US3227947A
Cited
US3264569A
Cited
US3546616A
Cited
US3559088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |