US4065679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic logic system
Assignee: AT&T Teletype Corp
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Filing: 1969-05-07
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Granted: 1977-12-27
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Expires: 1989-05-07
Abstract
Abstract A dynamic logic system is disclosed in which a capacitor is charged by a clock signal through a gating device. The capacitor is either discharged or remains at its charged value in response to the impedance of a logic circuit. Two such systems are disclosed in which the output from the first logic system is applied as an input to the second logic system.
Inventors
- 👤 Richard H. Heeren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:54
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/08; H03K19/094; H03K19/096
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
195 words
In combination; a field effect transistor having a source, a drain and gate for providing an impedance condition between said source and said drain; a first controlled switch having a first control terminal and first and second controlled terminals, said switch being responsive to a signal applied to said control terminal for altering the impedance between said first and second controlled terminals; means for connecting said source and drain to said first and second controlled terminals providing first and second nodes, respectively; a second controlled switch having a second control terminal and third and fourth controlled terminals; means for connecting said second control terminal to said first node; a first capacitor having first and second electrodes; means for connecting said second node to said second electrode; means for providing a clock signal between said first electrode and said first node; means for applying said clock signal to said first control terminal; means for applying an information signal to said third controlled terminal; a second capacitor connected between said first electrode of said first capacitor and said fourth controlled terminal; and means for connecting said fourth controlled terminal to said gate of said field effect transistor.
Claim 2
Dependent Claim
195 words
In combination; a field effect transistor having a source, a drain and gate for providing an impedance condition between said source and said drain; a first controlled switch having a first control terminal and first and second controlled terminals, said switch being responsive to a signal applied to said control terminal for altering the impedance between said first and second controlled terminals; means for connecting said source and drain to said first and second controlled terminals providing first and second nodes, respectively; a second controlled switch having a second control terminal and third and fourth controlled terminals; means for connecting said second control terminal to said first node; a first capacitor having first and second electrodes; means for connecting said second node to said second electrode; means for providing a clock signal between said first electrode and said first node; means for applying said clock signal to said first control terminal; means for applying an information signal to said third controlled terminal; a second capacitor connected between said first electrode of said first capacitor and said fourth controlled terminal; and means for connecting said fourth controlled terminal to said gate of said field effect transistor.
Claim 3
Dependent Claim
20 words
The combination as defined in claim 1, in which said first and second controlled switches are each field effect transistors.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |