Patent US3573503A successfully refreshed from Google Patents.
US3573503A
Expired / Lapsed
US
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Pulse generating circuit
Assignee: GTE Sylvania Inc
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Filing: 1969-01-31
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Granted: 1971-04-06
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Expires: 1989-01-31
Abstract
Abstract A regenerative pulse-generating circuit having hysteresis for producing a train of constant amplitude, varying width output pulses having fast rise and fall times from a train of low level, varying amplitude analog input pulses. Each analog input pulse is applied to an input switching transistor which, during the quiescent mode of operation of the pulse generating circuit, is biased in its saturation region. When the voltage level of the input pulse reaches an upper threshold voltage level of the pulse-generating circuit, the input switching transistor starts to rapidly turn off and causes the voltage at the base of an emitter-follower output transistor coupled thereto to rapidly change. When this voltage reaches a predetermined value, it is clamped to that value by means of a diode. The emitter-follower output transistor, which is biased in a low conduction state during the quiescent mode of operation of the pulse-generating circuit, is operated in a high conduction state and the voltage level at the emitter thereof changes from its quiescent value. When the voltage level of the input pulse reaches a lower threshold voltage level of the pulse-generating circuit, the input switching transistor and the output transistor are switched to their quiescent operating states whereby the voltage level at the emitter of the output transistor returns to its original value. Because of the presence of regeneration between the transistors, the transistors are switched from one state to another in a very rapid fashion.
Inventors
- 👤 Frank G Macey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:14
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286; H03K3/2893
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
460 words
A pulse-generating circuit comprising: first circuit means having a first operating condition and a second operating condition; an input connection to the first circuit means; said first circuit means being operable to switch from the first operating condition to the second operating condition in response to a first input condition at the input connection and being operable to switch from the second operating condition to the first operating condition in response to a second input condition at the input connection; second circuit means having an input connection and an output connection, said second circuit means having first and second operating conditions during which first and second output voltage levels, respectively, are produced at the output connection thereof each having a value less than the value of the corresponding input voltage level at the input connection thereof by a predetermined fixed value of voltage; regenerative feedback means coupling the first and second circuit means for providing regenerative action between the first and second circuit means to cause the first circuit means to rapidly switch from the first operating condition to the second operating condition and the second circuit means to rapidly switch from the first operating condition to the second operating condition in response to the presence of the first input condition at the input connection of the first circuit means, and to cause the first circuit means to rapidly switch from the second operating condition to the first operating condition and the second circuit means to rapidly switch from the second operating condition to the first operating condition in response to the presence of the second input condition at the input connection of the first circuit means; third circuit means connected to the input connection of the second circuit means and operable to provide a first input voltage level at the input connection of the second circuit means when the first circuit means is in the first operating condition whereby the second circuit means operates in the first operating condition and produces a first output voltage level at the output connection thereof which has a value less than the value of the first input voltage level by the predetermined fixed value of voltage; and fourth circuit means connected to the input connection of the second circuit means and operable to provide a second input voltage level at the input connection of the second circuit means having a value equal to the predetermined fixed value of voltage when the first circuit means is in the second operating condition whereby the second circuit means operates in the second operating condition and produces a second output voltage level at the output connection thereof having a value less than the value of the second input voltage level by the predetermined fixed value of voltage.
Claim 2
Dependent Claim
460 words
A pulse-generating circuit comprising: first circuit means having a first operating condition and a second operating condition; an input connection to the first circuit means; said first circuit means being operable to switch from the first operating condition to the second operating condition in response to a first input condition at the input connection and being operable to switch from the second operating condition to the first operating condition in response to a second input condition at the input connection; second circuit means having an input connection and an output connection, said second circuit means having first and second operating conditions during which first and second output voltage levels, respectively, are produced at the output connection thereof each having a value less than the value of the corresponding input voltage level at the input connection thereof by a predetermined fixed value of voltage; regenerative feedback means coupling the first and second circuit means for providing regenerative action between the first and second circuit means to cause the first circuit means to rapidly switch from the first operating condition to the second operating condition and the second circuit means to rapidly switch from the first operating condition to the second operating condition in response to the presence of the first input condition at the input connection of the first circuit means, and to cause the first circuit means to rapidly switch from the second operating condition to the first operating condition and the second circuit means to rapidly switch from the second operating condition to the first operating condition in response to the presence of the second input condition at the input connection of the first circuit means; third circuit means connected to the input connection of the second circuit means and operable to provide a first input voltage level at the input connection of the second circuit means when the first circuit means is in the first operating condition whereby the second circuit means operates in the first operating condition and produces a first output voltage level at the output connection thereof which has a value less than the value of the first input voltage level by the predetermined fixed value of voltage; and fourth circuit means connected to the input connection of the second circuit means and operable to provide a second input voltage level at the input connection of the second circuit means having a value equal to the predetermined fixed value of voltage when the first circuit means is in the second operating condition whereby the second circuit means operates in the second operating condition and produces a second output voltage level at the output connection thereof having a value less than the value of the second input voltage level by the predetermined fixed value of voltage.
Claim 3
Dependent Claim
66 words
A pulse-generating circuit in accordance with claim 1 wherein: the first operating condition of the first circuit means is a conduction condition and the second operating condition of the first circuit means is a nonconduction condition; and the first operating condition of the second circuit means is a low conduction condition and the second operating condition of the second circuit means is a high conduction condition.
Claim 4
Dependent Claim
225 words
A pulse-generating circuit in accordance with claim 1 wherein: the first circuit means includes a first source of potential, a first transistor having a first electrode connected to the input connection, a second electrode, and a third electrode; and the second circuit means includes a second transistor having a first electrode, a second electrode connected to the first source of potential, and a third electrode connected to the output connection; and including: a first resistance connected to the first electrode of the first transistor and to the first source of potential; a second resistance connected to the second electrode of the first transistor and to the first electrode of the second transistor; a second source of potential; a third resistance connected to the third electrode of the first transistor and to the second source of potential; a third source of potential; a fourth resistance connected to the juncture of the second resistance and the first electrode of tHe second transistor and to the third source of potential; a fifth resistance connected to the third electrode of the first transistor and to the third electrode of the second transistor; and a diode having a first electrode connected to the first source of potential and a second electrode connected to the juncture of the second resistance, the fourth resistance, and the first electrode of the second transistor.
Claim 5
Dependent Claim
28 words
A pulse-generating circuit in accordance with claim 3 wherein the first, second, and third electrodes of the first and second transistors are base, collector, and emitter electrodes, respectively.
Claim 6
Dependent Claim
199 words
A pulse-generating circuit a in accordance with claim 4 wherein: the first input condition at the input connection of the first circuit means is a first voltage level and the second input condition at the input connection of the first circuit means is a second voltage level; the values of the parameters of the components of the pulse generating circuit are selected to cause the first transistor to operate in a nonconduction state and the second transistor to operate in a high conduction state in response to the presence of the first voltage level at the input connection of the first circuit means, and to cause the first transistor to operate in its saturation region and the second transistor to operate in a low conduction state in response to the presence of the second voltage level at the input connection of the first circuit means; and the value of the first voltage level being established by the values selected for the first resistance, the third resistance, and the second source of potential; and the value of the second voltage level being established by the values selected for the third resistance, the fifth resistance, and the second source of potential.
Claim 7
Dependent Claim
71 words
A pulse-generating circuit in accordance with claim 5 wherein: the first and second transistors are of the PNP type; the first source of potential is ground potential; the second source of potential is a source of positive potential; the third source of potential is a source of negative potential; and the first electrode of the diode is the anode electrode and the second electrode of the diode is the cathode electrode.
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |