Patent US3701909A successfully refreshed from Google Patents.
US3701909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peak and hold system
Assignee: Computer Test Corp
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Filing: 1970-08-17
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Granted: 1972-10-31
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Expires: 1990-08-17
Abstract
Abstract A system and method for detecting the time of maximum amplitude of a bipolar unknown signal and generating a trigger pulse referenced to that time. The unknown signal is sampled at the time of the trigger pulse and the resultant sampled value is stored in short term storage. The short term stored value is transferred by control logic to long term storage where it remains available to be analyzed.
Inventors
- 👤 Walter V Holmes
- 👤 John F Renz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:16
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/25; H; H03; H03K; H03K5/00; H03K5/153; H03K5/1532
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
199 words
A system for sampling an unknown signal only for a single time interval in which the resultant sampled value is first stored for a short term and then transferred to long term storage comprising first and second amplifier means, short term storage means connected to an input of said first amplifier means having said sampled signal applied thereto, first switching means when switched on for providing a first negative feedback loop for said first amplifier means, a feedback circuit for said first and second amplifier means, second switching means connected between said first and second amplifier means when switched on for providing a second negative feedback loop through said feedback circuit for said first and second amplifier means, long term storage means connected to an input of said second amplifier means, and means for switching (1) said first switching means off and said second switching means on to transfer stored sampled signal from said short term to said long term storage means and (2) said second switching means off and said first switching means on whereby a negative feedback loop is continuously provided for said first amplifier means thereby to maintain said first amplifier means in an unsaturated state.
Claim 2
Independent Claim
199 words
A system for sampling an unknown signal only for a single time interval in which the resultant sampled value is first stored for a short term and then transferred to long term storage comprising first and second amplifier means, short term storage means connected to an input of said first amplifier means having said sampled signal applied thereto, first switching means when switched on for providing a first negative feedback loop for said first amplifier means, a feedback circuit for said first and second amplifier means, second switching means connected between said first and second amplifier means when switched on for providing a second negative feedback loop through said feedback circuit for said first and second amplifier means, long term storage means connected to an input of said second amplifier means, and means for switching (1) said first switching means off and said second switching means on to transfer stored sampled signal from said short term to said long term storage means and (2) said second switching means off and said first switching means on whereby a negative feedback loop is continuously provided for said first amplifier means thereby to maintain said first amplifier means in an unsaturated state.
Claim 3
Dependent Claim
28 words
The system of claim 1 in which there is provided clear means for rapid discharge of said short term storage means after said transfer of stored sampled signal.
Claim 4
Dependent Claim
112 words
The system of claim 1 in which there is provided a complementary Darlington pair of semiconductor devices having an input and an output, said second switching means being connected between a terminal of an input device of said pair and said pair output whereby current flow through an output device of said pair is of substantially large value for rapid charge of said long term storage means when said second switching means is on thereby to transfer stored sampled signal from said short term to said long term storage means in which said short term stored signal is of more positive value than that previously stored on said long term storage means.
Claim 5
Dependent Claim
22 words
The system of claim 3 in which said input of said pair is connected to an output of said first amplifier means.
Claim 6
Dependent Claim
37 words
The system of claim 4 in which there is provided an additional complementary Darlington pair of semiconductor devices to transfer stored sampled signals of more negative value than that previously stored on said long term storage means.
Claim 7
Dependent Claim
19 words
The system of claim 1 in which said first and second switching means each comprise a field effect transistor.
Claim 8
Independent Claim
245 words
A system for sampling an unknown signal only for a single time interval in which the sampled value is first stored for a short term and then transferred to long term storage comprising first and second amplifier means, short term capacitive storage means connected to an input of said first amplifier means, means for sampling only at a single time said unknown signal and for applying said sampled signal to said short term storage means, first switching means connected between an output and said input of said first amplifier means, long term capacitive storage means connected to an input of said second amplifier means, second switching means connected between said long term storage means and said output of said first amplifier means, a feedback circuit connected between an output of said second amplifier means and said first amplifier input, and means for switching (1) during a first state said first switching means off and said second switching means on to close a negative feedback loop through said second switching means and said feedback circuit to transfer stored sampled signal from said short to said long term storage means and (2) during a second state said second switching means off and said first switching means on to close a negative feedback loop for said first amplifier means through said first switching means whereby a negative feedback loop is continuously provided for said first amplifier means thereby to maintain said first amplifier means in an unsaturated state.
Claim 9
Independent Claim
245 words
A system for sampling an unknown signal only for a single time interval in which the sampled value is first stored for a short term and then transferred to long term storage comprising first and second amplifier means, short term capacitive storage means connected to an input of said first amplifier means, means for sampling only at a single time said unknown signal and for applying said sampled signal to said short term storage means, first switching means connected between an output and said input of said first amplifier means, long term capacitive storage means connected to an input of said second amplifier means, second switching means connected between said long term storage means and said output of said first amplifier means, a feedback circuit connected between an output of said second amplifier means and said first amplifier input, and means for switching (1) during a first state said first switching means off and said second switching means on to close a negative feedback loop through said second switching means and said feedback circuit to transfer stored sampled signal from said short to said long term storage means and (2) during a second state said second switching means off and said first switching means on to close a negative feedback loop for said first amplifier means through said first switching means whereby a negative feedback loop is continuously provided for said first amplifier means thereby to maintain said first amplifier means in an unsaturated state.
Claim 10
Dependent Claim
47 words
The system of claim 7 in which said first and second switching means comprise a pair of complementary field effect transistors whereby during said second state said second switching means provides a substantially high impedance connected to said long term storage means for maintaining the charge thereon.
Claim 11
Dependent Claim
107 words
The system of claim 7 in which there is provided a complementary Darlington pair of transistors having an input and an output, said second switching means being connected between an emitter of an input transistor of said pair and said output of said pair, said input of said pair being connected to said output of said first amplifier means whereby during said first state current flow through an output transistor of said pair is of substantial large value for rapid charge of said long term storage means, said current flow being discontinued prior to said switching from said first to said second state thereby to avoid overshoot.
Claim 12
Dependent Claim
32 words
The system of claim 9 in which there is provided an additional complementary Darlington pair of transistors for transferring stored sample signals of opposite polarity to that of said first named pair.
Claim 13
Independent Claim
232 words
A system for accurate and rapid charge and discharge of a storage capacitor to a predetermined potential comprising input means for applying said predetermined potential, switching means connected between said input means and said storage capacitor, a first complementary Darlington pair of transistors having an input NPN and an output PNP transistor for producing charging current for said storage capacitor, a second complementary Darlington pair of transistors having an input PNP and an output NPN transistor for providing discharging current for said storage capacitor, each of said pairs having an output, the base of each input transistor of each pair being connected to said input means, said switching means being connected between the emitters of each of said input transistors and each output of said pairs, means for applying switching signals to (1) turn off said switching means thereby to maintain the potential stored on said storage capacitor and (2) turn on said switching means to provide as a function of the difference between said stored potential and said predetermined potential either (a) a charging path for said storage capacitor and turning on said first pair or (b) a discharging path for said capacitor and turning on said second pair whereby during said charging or discharging of said storage capacitor current flow through one of said output transistors is of substantially large value for rapid charge or discharge of said storage capacitor.
Claim 14
Independent Claim
232 words
A system for accurate and rapid charge and discharge of a storage capacitor to a predetermined potential comprising input means for applying said predetermined potential, switching means connected between said input means and said storage capacitor, a first complementary Darlington pair of transistors having an input NPN and an output PNP transistor for producing charging current for said storage capacitor, a second complementary Darlington pair of transistors having an input PNP and an output NPN transistor for providing discharging current for said storage capacitor, each of said pairs having an output, the base of each input transistor of each pair being connected to said input means, said switching means being connected between the emitters of each of said input transistors and each output of said pairs, means for applying switching signals to (1) turn off said switching means thereby to maintain the potential stored on said storage capacitor and (2) turn on said switching means to provide as a function of the difference between said stored potential and said predetermined potential either (a) a charging path for said storage capacitor and turning on said first pair or (b) a discharging path for said capacitor and turning on said second pair whereby during said charging or discharging of said storage capacitor current flow through one of said output transistors is of substantially large value for rapid charge or discharge of said storage capacitor.
Claim 15
Dependent Claim
79 words
The system of claim 11 in which there is provided first and second amplifier means, a negative feedback loop connected between an output of said second amplifier means and an input of said first amplifier means, said first amplifier being connected between said input means and said bases of said input transistors, said outputs of said pairs being connected to said second amplifier means whereby with said switching means turned on there is provided a closed negative feedback loop.
Claim 16
Dependent Claim
69 words
The system of claim 12 in which there is provided an additional switching means connected between said output of said first amplifier means and said feedback loop, said switching signals being applied to said additional switching means for turning said additional switching means on and off when said switching means is turned off and on respectively to provide a negative feedback loop continuously maintained around said first amplifier means.
Claim 17
Dependent Claim
20 words
The system of claim 13 in which said input means samples an unknown signal only for a single time interval.
Claim 18
Dependent Claim
37 words
The system of claim 11 in which there is provided means for controlling said applying means to maintain said switching means turned on until said current flow through said output transistor has discontinued thereby to avoid overshoot.
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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |