US3723766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peak detector
Assignee: Information Storage Systems Inc
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Filing: 1971-08-16
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Granted: 1973-03-27
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Expires: 1991-08-16
Abstract
Abstract A circuit for detecting the peak of a pulse for purposes of reference, or the like. The circuit features a modified Schmidt trigger which is arranged to generate a square wave pulse having a leading edge coinciding with the peak of an incoming pulse from, for example, a once-around transducer associated with a magnetic disc memory.
Inventors
- 👤 F Sordello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:28
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/153; H03K5/1532; H03K3/00; H03K3/02; H03K3/023; H03K3/0233; H03K3/02337
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
216 words
A peak detector comprising a Schmidt trigger circuit having first and second comparator input terminals and a detector output terminal, said circuit abruptly initiating generation of a pulse having a detectable leading edge at said output terminal responsive to said second input terminal being relatively more positive than said first input terminal and terminating said pulse responsive to said first input terminal being relatively more positive than said second input terminal, means coupling one of said first and second comparator input terminals to a signal input terminal adapted to receive input pulses deviating between a continuous bias and a pulse peak level, said means clipping said input pulses at a predetermined voltage level and applying the clipped pulses to said one of said first and second comparator input terminals, and a differentiator coupling said signal input terminal to the other of said first and second comparator input terminals, said differentiator applying a differentiated waveform of said input pulses to said other comparator input terminal having an initial peak in one direction merging with a peak in the opposite direction through a crossover point coinciding with the peak of each of said input pulses whereby said trigger circuit generates pulses at said output terminal having leading edges in time correspondence with said peaks of said input pulses.
Claim 2
Dependent Claim
216 words
A peak detector comprising a Schmidt trigger circuit having first and second comparator input terminals and a detector output terminal, said circuit abruptly initiating generation of a pulse having a detectable leading edge at said output terminal responsive to said second input terminal being relatively more positive than said first input terminal and terminating said pulse responsive to said first input terminal being relatively more positive than said second input terminal, means coupling one of said first and second comparator input terminals to a signal input terminal adapted to receive input pulses deviating between a continuous bias and a pulse peak level, said means clipping said input pulses at a predetermined voltage level and applying the clipped pulses to said one of said first and second comparator input terminals, and a differentiator coupling said signal input terminal to the other of said first and second comparator input terminals, said differentiator applying a differentiated waveform of said input pulses to said other comparator input terminal having an initial peak in one direction merging with a peak in the opposite direction through a crossover point coinciding with the peak of each of said input pulses whereby said trigger circuit generates pulses at said output terminal having leading edges in time correspondence with said peaks of said input pulses.
Claim 3
Dependent Claim
77 words
A peak detector according to claim 1, further defined by said means coupling one of said first and second comparator input terminals to said signal terminal being a clipper comprising a diode and first and second divider resistors, the anode of said diode being connected to said signal input terminal and said first resistor connecting the cathode thereof to said first comparator input terminal, said second resistor being connected between saiD first comparator input terminal and ground.
Claim 4
Dependent Claim
48 words
A peak detector according to claim 1, further defined by said differentiator comprising a capacitor coupling said signal input terminal to said other of said first and second comparator input terminals, and a resistor connected between said other of said first and second comparator input terminals and ground.
Claim 5
Dependent Claim
39 words
A peak detector according to claim 2, further defined by said differentiator comprising a capacitor coupling said signal input terminal to said second comparator input terminal, and a third resistor connected between said second comparator input terminal and ground.
Claim 6
Dependent Claim
160 words
A peak detector according to claim 1, further defined by said trigger circuit comprising a level comparator having input terminals defining said first and second comparator input terminals and having a comparator output terminal, said comparator generating a positive potential at said comparator output terminal responsive to said second comparator input terminal being at a relatively more positive potential than said first comparator input terminal, said comparator generating a negative potential at said comparator output terminal responsive to said first comparator output terminal responsive to said first comparator input terminal being at a relatively more positive potential than said second comparator input terminal, a NPN transistor having a base, emitter, and collector, said base coupled to said comparator output terminal, said emitter connected to ground, said collector coupled by a resistor to a positive power supply terminal, said detector output terminal connected to said collector, and resistive feedback means coupling said detector output terminal to said second comparator input terminal.
Claim 7
Dependent Claim
40 words
A peak detector according to claim 5, further defined by said feedback means comprising a second resistor connecting said detector output terminal to said second comparator input terminal and a third resistor connecting said second comparator input terminal to ground.
Claim 8
Dependent Claim
57 words
A peak detector according to claim 6, further defined by said clipper comprising a diode and fourth and fifth resistors, the anode of said diode connected to said signal input terminal and said fourth resistor connecting the cathode thereof to the first comparator input terminal, said fifth resistor connected between said first comparator input terminal and ground.
Claim 9
Dependent Claim
26 words
A peak detector according to claim 6, further defined by said differentiator comprising a capacitor coupling said signal input terminal to said second comparator input terminal.
Claim 10
Dependent Claim
26 words
A peak detector according to claim 7, further defined by said differentiator comprising a capacitor coupling said signal input terminal to said second comparator input terminal.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |