US3890472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent time-division pulse-multiplex digital electric signal switching circuit arrangement
Assignee: International Business Machines Corp
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Filing: 1974-06-03
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Granted: 1975-06-17
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Expires: 1994-06-03
Abstract
Abstract Bilevel or bistatic digital electric signals are transmitted directly through a time division multiplexing (TDM) switching component asynchronously of the TDM clocking pulse train. A pulse duration modulated (PDM) electric signal or like wave is converted to a pulse amplitude modulated (PAM) electric wave having amplitude and timing components indicating a predetermined relationship to the TDM sampling period. The input PDM wave is amplitude limited by conventional circuitry and phase relationship is indicated by a ramp wave generator or a digital counter with the slope of the ramp wave or the counting rate proportional to the sampling period. Other forms of analog-todigital converter circuitry may be substituted. The converted PAM electric wave is then passed through the switching component in conventional manner. Thereafter, the switched PAM electric wave is analyzed for reconstructing the original PDM electric signal wave. Complementary circuitry is preferably used for regenerating the signal. The upper limit on the data rate corresponds to one transition of the input electric signal to one time division sampling period of the TDM switching component.
Inventors
- 👤 Dale Edward Fisk
- 👤 Merle Edward Homan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:40
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04B; H04B14/00; H04B14/02; H04J; H04J3/00; H04J3/16; H04J3/1676; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L5/00; H04L5/22
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
189 words
A time-division pulse-multiplex digital electric signal switching circuit arrangement of the type having an electric signal switching component through which an electric signal is translated by interconnecting switching input and output terminals for a predetermined portion only of a time cycle, comprising input terminals at which a pulse coding modulated electric signal wave is applied, output terminals at which a regenerated pulse coding modulated electric signal wave is delivered in substantially the same form as that of said electric signal wave applied at said input terminals, a circuit coupled between said signal input terminals and said switching input terminals having circuitry for driving a component electric wave of polarity and amplitude proportional to the amplitude of said signal wave, circuitry for deriving a component electric wave of amplitude value representative of the time relationship of the transistions in said electric signal wave to said time cycle of said switching component and circuitry for summing the amplitudes of said component electric waves, and a circuit coupled between said switching output terminals and said signal output terminals having circuitry responsive to said summed component waves for regenerating said electric signal wave.
Claim 2
Dependent Claim
189 words
A time-division pulse-multiplex digital electric signal switching circuit arrangement of the type having an electric signal switching component through which an electric signal is translated by interconnecting switching input and output terminals for a predetermined portion only of a time cycle, comprising input terminals at which a pulse coding modulated electric signal wave is applied, output terminals at which a regenerated pulse coding modulated electric signal wave is delivered in substantially the same form as that of said electric signal wave applied at said input terminals, a circuit coupled between said signal input terminals and said switching input terminals having circuitry for driving a component electric wave of polarity and amplitude proportional to the amplitude of said signal wave, circuitry for deriving a component electric wave of amplitude value representative of the time relationship of the transistions in said electric signal wave to said time cycle of said switching component and circuitry for summing the amplitudes of said component electric waves, and a circuit coupled between said switching output terminals and said signal output terminals having circuitry responsive to said summed component waves for regenerating said electric signal wave.
Claim 3
Dependent Claim
187 words
A time-division pulse-multiplex digital electric signal switching circuit arrangement of the type having an electric signal switching component through which an electric signal is translated by interconnecting switching input and output terminals for a predetermined portion only of a time cycle, comprising input terminals at which a pulse coding modulated electric signal wave is applied, output terminals at which a regenerated pulse coding modulated electric signal wave is delivered in substantially the same form as that of said electric signal wave applied at said input terminals, a circuit coupled between said signal input terminals and said switching input terminals having circuit for deriving a component electric wave of amplitude proportional to the amplitude of said signal wave, ramp voltage wave generating circuitry for deriving a component electric wave of value representative of the time relationship of the transitions in said electric signal wave to said time cycle of said switching component and circuitry for summing said component electric waves, and a circuit coupled between said switching output terminals and said signal output terminals having circuitry responsive to said summed component waves for regenerating said electric signal wave.
Claim 4
Dependent Claim
187 words
A time-division pulse-multiplex digital electric signal switching circuit arrangement of the type having an electric signal switching component through which an electric signal is translated by interconnecting switching input and output terminals for a predetermined portion only of a time cycle, comprising input terminals at which a pulse coding modulated electric signal wave is applied, output terminals at which a regenerated pulse coding modulated electric signal wave is delivered in substantially the same form as that of said electric signal wave applied at said input terminals, a circuit coupled between said signal input terminals and said switching input terminals having circuit for deriving a component electric wave of amplitude proportional to the amplitude of said signal wave, ramp voltage wave generating circuitry for deriving a component electric wave of value representative of the time relationship of the transitions in said electric signal wave to said time cycle of said switching component and circuitry for summing said component electric waves, and a circuit coupled between said switching output terminals and said signal output terminals having circuitry responsive to said summed component waves for regenerating said electric signal wave.
Claim 5
Dependent Claim
186 words
A time-division pulse-multiplex digital electric signal switching circuit arrangement of the type having an electric signal switching component through which an electric signal is translated by interconnecting switching input and output terminals for a predetermined portion only of a time cycle, comprising input terminals at which a pulse coding modulated electric signal wave is applied, output terminals at which a regenerated pulse coding modulated electric signal wave is delivered in substantially the same form as that of said electric signal wave applied at said input terminals, a circuit coupled between said signal input terminals and said switching input terminals having digital circuitry for deriving a component electric wave of polarity and amplitude proportional to the amplitude of said signal wave, digital counting circuitry arranged for establishing the amplitude value representative of the time relationship of the transitions in said electric signal wave to said time cycle of said switching component, and circuitry for summing said component electric waves, and a circuit coupled between said switching output terminals and said signal output terminals having circuitry responsIve to said summed component waves for regenerating said electric signal wave.
Claim 6
Dependent Claim
186 words
A time-division pulse-multiplex digital electric signal switching circuit arrangement of the type having an electric signal switching component through which an electric signal is translated by interconnecting switching input and output terminals for a predetermined portion only of a time cycle, comprising input terminals at which a pulse coding modulated electric signal wave is applied, output terminals at which a regenerated pulse coding modulated electric signal wave is delivered in substantially the same form as that of said electric signal wave applied at said input terminals, a circuit coupled between said signal input terminals and said switching input terminals having digital circuitry for deriving a component electric wave of polarity and amplitude proportional to the amplitude of said signal wave, digital counting circuitry arranged for establishing the amplitude value representative of the time relationship of the transitions in said electric signal wave to said time cycle of said switching component, and circuitry for summing said component electric waves, and a circuit coupled between said switching output terminals and said signal output terminals having circuitry responsIve to said summed component waves for regenerating said electric signal wave.
Claim 7
Dependent Claim
202 words
A time-division pulse-multiplex digital electric signal switching circuit arrangement of the type having an electric signal switching component through which an electric signal is translated by interconnecting switching input and output terminals for a predetermined portion only of a time cycle, comprising input terminals at which a pulse coding modulated electric signal wave is applied, output terminals at which a regenerated pulse coding and modulated electric signal wave is delivered in substantially the same form as that of said electric signal wave applied at said input terminals, a circuit coupled between said signal input terminals and said switching input terminals having circuitry for deriving a component electric wave of amplitude proportional to the amplitude of said signal wave, circuitry for deriving a component electric wave of value representative of the time relationship of the transitions in said electric signal wave to said time cycle of said switching component and circuitry for summing said component electric waves, and a circuit coupled between said switching and said signal output terminals having the same time relationship deriving circuitry as that in said circuit coupled between said signal input and said switching input terminals responsive to said summed component waves for regenerating said electric signal wave.
Claim 8
Dependent Claim
202 words
A time-division pulse-multiplex digital electric signal switching circuit arrangement of the type having an electric signal switching component through which an electric signal is translated by interconnecting switching input and output terminals for a predetermined portion only of a time cycle, comprising input terminals at which a pulse coding modulated electric signal wave is applied, output terminals at which a regenerated pulse coding and modulated electric signal wave is delivered in substantially the same form as that of said electric signal wave applied at said input terminals, a circuit coupled between said signal input terminals and said switching input terminals having circuitry for deriving a component electric wave of amplitude proportional to the amplitude of said signal wave, circuitry for deriving a component electric wave of value representative of the time relationship of the transitions in said electric signal wave to said time cycle of said switching component and circuitry for summing said component electric waves, and a circuit coupled between said switching and said signal output terminals having the same time relationship deriving circuitry as that in said circuit coupled between said signal input and said switching input terminals responsive to said summed component waves for regenerating said electric signal wave.
Claim 9
Dependent Claim
232 words
A time-division pulse-multiplex digital electric signal switching circuit arrangement of the type having an electric signal switching component through which an electric signal is translated by interconnecting switching input and output terminals for a predetermined portion only of a time cycle, comprising input terminals at which a pulse coding modulated electric signal wave is applied, output terminals at which a regenerated pulse coding modulated electric signal wave is delivered in substantially the same form as that of said electric signal wave applied at said input terminals, a circuit coupled between said signal input terminals and said switching input terminals having circuitry for deriving a component electric wave of amplitude proportional to the amplitude of said signal wave, circuitry for deriving a component electric wave of value representative of the time relationship of the transitions in said electric signal wave to said time cycle of said switching component and circuitry for summing said component electric waves, and a circuit coupled between said switching output terminals and said signal output terminals having circuitry for deriving component electric wave of amplitude proportional to the amplitude of said wave, circuitry for deriving a component wave of value representative of the time relationship of the impulses of said time cycle for summing said component electric waves, thereby regenerating the transitions in said electric signal wave and regenerating said electric signal wave delayed by one said time cycle.
Claim 10
Dependent Claim
232 words
A time-division pulse-multiplex digital electric signal switching circuit arrangement of the type having an electric signal switching component through which an electric signal is translated by interconnecting switching input and output terminals for a predetermined portion only of a time cycle, comprising input terminals at which a pulse coding modulated electric signal wave is applied, output terminals at which a regenerated pulse coding modulated electric signal wave is delivered in substantially the same form as that of said electric signal wave applied at said input terminals, a circuit coupled between said signal input terminals and said switching input terminals having circuitry for deriving a component electric wave of amplitude proportional to the amplitude of said signal wave, circuitry for deriving a component electric wave of value representative of the time relationship of the transitions in said electric signal wave to said time cycle of said switching component and circuitry for summing said component electric waves, and a circuit coupled between said switching output terminals and said signal output terminals having circuitry for deriving component electric wave of amplitude proportional to the amplitude of said wave, circuitry for deriving a component wave of value representative of the time relationship of the impulses of said time cycle for summing said component electric waves, thereby regenerating the transitions in said electric signal wave and regenerating said electric signal wave delayed by one said time cycle.
Claim 11
Dependent Claim
361 words
A time-division pulse-multiplex digital electric signal switching circuit arrangement of the type having an electric signal switching component through which an electric signal is translated by interconnecting switching input and output terminals for a predetermined portion only of a time cycle, comprising input terminals at which a bistatic electric signal wave is applied, output terminals at which a regenerated bistatic electric signal wave is delivered in substantially the same form as that if said electric signal wave applied at said input terminals, a ramp voltage wave generating circuit having an input terminal coupled to the first said input terminals and having an output terminal, an electric wave inverting circuit having an input terminal coupled to the first said input terminals and having an output terminal, summing circuitry connecting said output terminals of said ramp voltage wave generating circuit and said electric wave inverting circuit To said electric switching components, a sample-and-hold circuit having an input terminal connected to said electric circuit switching component and having an output terminal, a pair of differential amplifying circuits having input terminals of opposite polarity connected in common to said output terminal of said sample-and-hold circuit and having output terminals, a bilateral flip-flop circuit having set and reset terminals individually connected to said output terminals of said pair of differential amplifying circuits and having erect and inverted output terminals, another ramp voltage wave generating circuit having an input terminal connected to one of said output terminals of said bilateral flip-flop circuit, other summing circuitry connected to said output terminal of said other ramp voltage wave generating circuit and to said output terminal of said sample-and-hold circuit and having a common terminal, another pair of differential amplifying circuits having input terminals of opposite polarity connected in common to said common terminal of said other summing circuitry and having output terminals connected individually to set and reset terminals, another bilateral flip-flop circuit having set and reset terminals connected individually to said output terminals of said other pair of differential amplifying circuits and having erect and inverted output terminals, and circuitry connecting one of said output terminals of said other bilateral flip-flop circuit to the first said output terminals.
Claim 12
Dependent Claim
361 words
A time-division pulse-multiplex digital electric signal switching circuit arrangement of the type having an electric signal switching component through which an electric signal is translated by interconnecting switching input and output terminals for a predetermined portion only of a time cycle, comprising input terminals at which a bistatic electric signal wave is applied, output terminals at which a regenerated bistatic electric signal wave is delivered in substantially the same form as that if said electric signal wave applied at said input terminals, a ramp voltage wave generating circuit having an input terminal coupled to the first said input terminals and having an output terminal, an electric wave inverting circuit having an input terminal coupled to the first said input terminals and having an output terminal, summing circuitry connecting said output terminals of said ramp voltage wave generating circuit and said electric wave inverting circuit To said electric switching components, a sample-and-hold circuit having an input terminal connected to said electric circuit switching component and having an output terminal, a pair of differential amplifying circuits having input terminals of opposite polarity connected in common to said output terminal of said sample-and-hold circuit and having output terminals, a bilateral flip-flop circuit having set and reset terminals individually connected to said output terminals of said pair of differential amplifying circuits and having erect and inverted output terminals, another ramp voltage wave generating circuit having an input terminal connected to one of said output terminals of said bilateral flip-flop circuit, other summing circuitry connected to said output terminal of said other ramp voltage wave generating circuit and to said output terminal of said sample-and-hold circuit and having a common terminal, another pair of differential amplifying circuits having input terminals of opposite polarity connected in common to said common terminal of said other summing circuitry and having output terminals connected individually to set and reset terminals, another bilateral flip-flop circuit having set and reset terminals connected individually to said output terminals of said other pair of differential amplifying circuits and having erect and inverted output terminals, and circuitry connecting one of said output terminals of said other bilateral flip-flop circuit to the first said output terminals.
Claim 13
Dependent Claim
48 words
A time-division pulse-multiplex digital electric signal switching circuit arrangement as defined in claim 6 and wherein, at least one of said ramp voltage wave generating circuits comprises an operational amplifying circuit and a capacitor connected from the output terminal to the input terminal of said operational amplifying circuit.
Claim 14
Dependent Claim
30 words
A time-division pulse-multiplex digital electric signal switching circuit arrangement as defined in claim 6 and wherein said other summing circuitry is connected to the output terminal of the sample-and-hold circuit.
Claim 15
Dependent Claim
25 words
A time-division pulse-multiplex digital electric signal switching circuit arrangement as defined in claim 6 and wherein said ramp voltage wave generating circuits are substantially identical.
Claim 16
Dependent Claim
68 words
A time-division pulse-multiplex digital electric signal switching circuit arrangement as defined in claim 6 and werein electric switch means are arranged for providing a direct connection from the first said input terminals to said electric switch component, and a direct connection from said output terminal of said sample-and-hold circuit to the first said output terminals, whereby electric voice frequency wave signal is translated through said electric switch component.
References Cited (Backward Citations)
US3535450A
Cited
US3691464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |