US3670179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical circuit
Assignee: RCA Corp
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Filing: 1970-10-22
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Granted: 1972-06-13
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Expires: 1990-10-22
Abstract
Abstract A shift register employing a plurality of complementary flipflop circuits with noncapacitive interstage coupling.
Inventors
- 👤 Winthrop Seeley Pike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:27
CPC Classifications
H; H03; H03K; H03K23/00; H03K23/40; H03K23/50; H03K23/54; G; G11; G11C; G11C19/00; G11C19/28
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
316 words
A shift register comprising; a plurality of circuit stages; each of said circuit stages including at least first and second semiconductor devices of opposite conductivity type; each of said first and second semiconductor devices having first, second and third electrodes; said first and second electrodes defining a conduction path in said semiconductor devices; said third electrode adapted to control the conduction in said conduction path as a function of the signal applied to said third electrode; said third electrode of each semiconductor device in each circuit stage connected to said second electrode of the other semiconductor device in the same circuit stage so that the conduction in the conduction path of each one of said first and second semiconductor devices of a circuit stage is controlled by the conduction in the conduction path of the other one of said first and second semiconductor devices in the same circuit stage; and a coupling semiconductor device having first, second and third electrodes; said first and second electrodes defining a conduction path in said coupling semiconductor device, said third electrode adapted to control the conduction in said conduction path in said coupling semiconductor device as a function of the signal applied to said third electrode of said coupling semiconductor device; said third electrode of said coupling semiconductor device connected to one of the electrodes defining the conduction path in the second semiconductor device in the same circuit stage; and at least one of said first and second electrodes of said coupling semiconductor device connected to one of the electrodes defining the conduction path in the first semiconductor device of the succeeding circuit stage of said shift register in order to control the conduction in the conduction path of said first semiconductor device in the succeeding circuit stage; and bipolar drive means for selectively rendering at least one of said plurality of circuit stages operative to receive information transferred thereto.
Claim 2
Dependent Claim
316 words
A shift register comprising; a plurality of circuit stages; each of said circuit stages including at least first and second semiconductor devices of opposite conductivity type; each of said first and second semiconductor devices having first, second and third electrodes; said first and second electrodes defining a conduction path in said semiconductor devices; said third electrode adapted to control the conduction in said conduction path as a function of the signal applied to said third electrode; said third electrode of each semiconductor device in each circuit stage connected to said second electrode of the other semiconductor device in the same circuit stage so that the conduction in the conduction path of each one of said first and second semiconductor devices of a circuit stage is controlled by the conduction in the conduction path of the other one of said first and second semiconductor devices in the same circuit stage; and a coupling semiconductor device having first, second and third electrodes; said first and second electrodes defining a conduction path in said coupling semiconductor device, said third electrode adapted to control the conduction in said conduction path in said coupling semiconductor device as a function of the signal applied to said third electrode of said coupling semiconductor device; said third electrode of said coupling semiconductor device connected to one of the electrodes defining the conduction path in the second semiconductor device in the same circuit stage; and at least one of said first and second electrodes of said coupling semiconductor device connected to one of the electrodes defining the conduction path in the first semiconductor device of the succeeding circuit stage of said shift register in order to control the conduction in the conduction path of said first semiconductor device in the succeeding circuit stage; and bipolar drive means for selectively rendering at least one of said plurality of circuit stages operative to receive information transferred thereto.
Claim 3
Dependent Claim
25 words
The shift register recited in claim 1 including an output terminal connected to said second semiconductor device in at least one of said circuit stages.
Claim 4
Dependent Claim
38 words
The shift register recited in claim 1 wherein said first, second and coupling semiconductor devices comprise transistors, said first and second transistors being of opposite conductivity types, said first and said coupling transistors being of similar conductivity types.
Claim 5
Dependent Claim
66 words
The shift register recited in claim 1 including a third semiconductor device in each of said circuit stages having first, second and third electrodes; said third semiconductor device having the conduction path defined by said first and second electrodes thereof connected in series with said conduction path of said first semiconductor device; said third semiconductor device having the third electrode thereof connected to said drive means.
Claim 6
Dependent Claim
93 words
The shift register recited in claim 1 including a third semiconductor device in each of said circuit stages having first, second and third electrodes; said third semiconductor device having the conduction path defined by said first and second electrodes thereof connected between the third electrode of said first semiconductor device and one of said first and second electrodes which define the conduction path of said first semiconductor device, said third semiconductor device having the third electrode thereof connected to said drive means whereby conduction by said first and third semiconductor devices is controlled.
Claim 7
Dependent Claim
64 words
The shift register recited in claim 5 wherein said couPling semiconductor device has the conduction path thereof connected from said first semiconductor device in the succeeding circuit stage to said drive means such that said coupling semiconductor device effectively shunts said first semiconductor device in accordance with the signals supplied to said coupling semiconductor device by said one stage and by said drive means.
Claim 8
Dependent Claim
74 words
The shift register recited in claim 5 wherein said first, third and coupling semiconductor devices comprise transistors of one conductivity type; said drive means includes a source of regularly recurring pulses; the emitter electrode of said coupling transistor and the base electrode of said third transistor are connected to said source so that said third and coupling transistors of each stage are in opposite conductivity states in response to a pulse from said source.
Claim 9
Dependent Claim
76 words
The shift register recited in claim 4 wherein said first, third and coupling semiconductor devices comprise transistors of one conductivity type; said drive means includes a source of regularly recurring pulses; the emitter of said coupling transistor connected to said source to receive pulses of one phase; the base of said third transistor connected to said source to receive pulses of a different phase so that said third and coupling transistors are concurrently enabled for conduction.
Claim 10
Dependent Claim
39 words
The shift register recited in claim 1 including power source means, said power source means connected to each of said circuit stages to provide power thereto, said power source operating at a different frequency relative to said drive means.
Claim 11
Dependent Claim
48 words
The shift register recited in claim 1 wherein said plurality of circuit stages includes odd numbered circuit stages and even numbered circuit stages, said bipolar drive means supplying signals for selectively rendering said odd numbered circuit stages operative and said even numbered circuit stages inoperative and vice versa.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |