Patent US3668437A successfully refreshed from Google Patents.
US3668437A
Expired / Lapsed
US
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Pulse generator apparatus
Assignee: Bull SAS
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Filing: 1970-04-06
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Granted: 1972-06-06
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Expires: 1990-04-06
Abstract
Abstract A pulse generator for providing pulse sequences in which the individual pulses are of different durations, wherein a multistable device having a plurality of different states determines the order of the pulses of the sequences, wherein a multivibrator steps the multistable device through its sequence of states, and wherein the multistable device is coupled to the multivibrator to vary its controlling time constants during certain of such states.
Inventors
- 👤 Atanasije M Bankovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:31
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/78; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/282; H03K3/2821; H03K3/29; H03K5/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
243 words
A pulse generator having a multistable device including at least a first and a second flip-flop and a multivibrator circuit of the type having two R-C time constant networks and two corresponding complementary outputs, wherein the improvement comprises: each flip-flop of the multistable device being provided with two separate control inputs, with one common control input, and with two complementary outputs; connections being provided between the outputs of each of said flip-flops and the separate inputs of the other flip-flop appropriate for determining the order of succession of the stable states of the multistable device; said multivibrator circuit being provided with at least one access terminal from which one of said networks can have its time constant modified; a start-stop device connected to said multivibrator circuit for assuring either a state of rest thereof or an operating state; a first set of connections for coupling at least said access terminal of said multivibrator circuit to an output of one of said flip-flops and a second set of connections for coupling each output of said multivibrator circuit to the common input of a respective one of said flip-flops, said connections being arranged such that each output of the said multivibrator can generate, during the operating state, two pulses in the course of at least one pulse sequence composed of four phases, in which at least one of said phases corresponds to the modified time constant of a time constant network of said multivibrator circuit.
Claim 2
Dependent Claim
243 words
A pulse generator having a multistable device including at least a first and a second flip-flop and a multivibrator circuit of the type having two R-C time constant networks and two corresponding complementary outputs, wherein the improvement comprises: each flip-flop of the multistable device being provided with two separate control inputs, with one common control input, and with two complementary outputs; connections being provided between the outputs of each of said flip-flops and the separate inputs of the other flip-flop appropriate for determining the order of succession of the stable states of the multistable device; said multivibrator circuit being provided with at least one access terminal from which one of said networks can have its time constant modified; a start-stop device connected to said multivibrator circuit for assuring either a state of rest thereof or an operating state; a first set of connections for coupling at least said access terminal of said multivibrator circuit to an output of one of said flip-flops and a second set of connections for coupling each output of said multivibrator circuit to the common input of a respective one of said flip-flops, said connections being arranged such that each output of the said multivibrator can generate, during the operating state, two pulses in the course of at least one pulse sequence composed of four phases, in which at least one of said phases corresponds to the modified time constant of a time constant network of said multivibrator circuit.
Claim 3
Dependent Claim
85 words
The pulse generator of claim 1, wherein said multivibrator circuit is provided with an additional access terminal from which the other one of said networks can have its time constant modified, said first set of connections including a connection for coupling said additional access terminal of said multivibrator circuit to an output of the other one of said flip-flops, such that during said pulse sequence two phases correspond respectively to the modified time constants of each of the time constant networks of said multivibrator circuit.
Claim 4
Dependent Claim
100 words
The pulse generator of claim 1, wherein said multivibrator circuit comprises two branches, each branch comprising a first transistor, a second complementary transistor, and a third transistor of the same conductivity type as said second transistor, wherein a resistor is connected to the emitter of said first transistor, a capacitor, said resistor and capacitor constituting a time constant network, and wherein there is further provided additional resistaNce connected between said emitter and said access terminal by which the normal time constant of said network can be reduced when the flip-flop connected to said access terminal is in a predetermined state.
Claim 5
Dependent Claim
44 words
The pulse generator of claim 3, wherein said start-stop device comprises a switch member connected between the base and the emitter of said third transistor of one of said two multivibrator circuit branches, whereby a predetermined rest state of said multivibrator circuit is determined.
Claim 6
Dependent Claim
74 words
The pulse generator of claim 4, wherein said switch member is constituted of the emitter-collector path of an additional transistor and wherein the state of conduction of said additional transistor is controlled by a logic circuit of which one input receives a control signal and the two other inputs are each connected to an output of a different flip-flop of the multistable device, according to the state of rest selected for the pulse generator.
Claim 7
Dependent Claim
148 words
Apparatus for generating a sequence of n pulses wherein at least one of said pulses is of different duration than the other pulses of said sequence, comprising: a multistable device controllable in response to a succession of control signals received thereby for operating successively in n different stable states, n being at least 4, said multistable device delivering an output signal when said multistable device is operating in a predetermined one of said n states, a control signal generator for generating said succession of control signals, said control signal generator comprising a plurality of time-constant networks for determining the intervals between adjacent ones of said control signals, means coupling said control signal generator to deliver said control signals to said multistable device, and means for transmitting said output signal to said control signal generator for modifying the time constant of one of said networks during said one state.
Claim 8
Dependent Claim
148 words
Apparatus for generating a sequence of n pulses wherein at least one of said pulses is of different duration than the other pulses of said sequence, comprising: a multistable device controllable in response to a succession of control signals received thereby for operating successively in n different stable states, n being at least 4, said multistable device delivering an output signal when said multistable device is operating in a predetermined one of said n states, a control signal generator for generating said succession of control signals, said control signal generator comprising a plurality of time-constant networks for determining the intervals between adjacent ones of said control signals, means coupling said control signal generator to deliver said control signals to said multistable device, and means for transmitting said output signal to said control signal generator for modifying the time constant of one of said networks during said one state.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |