Patent US3740577A successfully refreshed from Google Patents.
US3740577A
Expired / Lapsed
US
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Capacitive store shift register
Assignee: US Philips Corp
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Filing: 1970-02-02
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Granted: 1973-06-19
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Expires: 1990-02-02
Abstract
Abstract A capacitive store comprising a sequence of capacitors and transistors, in which the capacitors are connected in series with the main current paths of the transistors in order to reduce the distortion of the signal to be handled and to increase the frequency range in which the store can be used.
Inventors
- 👤 F Sangster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:39
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; G; G11; G11C; G11C27/00; G11C27/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
117 words
A capacitor store, comprising a first plurality of transistors of a first conductivity type each having a main conduction path, a second plurality of transistors of an opposite conductivity type each having a main conduction path, means for connecting the main conduction paths of all the transistors of both conductivity types in a series circuit wherein the transistors are alternately of opposite conductivity types, and wherein a capacitor is connected between each transistor of the series and an adjacent transistor in series with the main conduction paths of the associated transistors, and means for connecting switching voltages to the main conduction paths of each of the transistors in the series through an associated capacitor of the series.
Claim 2
Dependent Claim
117 words
A capacitor store, comprising a first plurality of transistors of a first conductivity type each having a main conduction path, a second plurality of transistors of an opposite conductivity type each having a main conduction path, means for connecting the main conduction paths of all the transistors of both conductivity types in a series circuit wherein the transistors are alternately of opposite conductivity types, and wherein a capacitor is connected between each transistor of the series and an adjacent transistor in series with the main conduction paths of the associated transistors, and means for connecting switching voltages to the main conduction paths of each of the transistors in the series through an associated capacitor of the series.
Claim 3
Dependent Claim
127 words
A capacitor store as claimed in claim 1, wherein each transistor of the series comprises a control input, wherein the current through the main conduction path of each transistor varies as a function of the voltage between the control input and one end of the main conduction path thereof, further comprising a first plurality of diodes, each connected in parallel with an associated transistor between the control input and the one end of the main conduction path, each diode of the first plurality of diodes having a polarity wherein normal conduction through the main conduction path of an associated transistor passes through an associated diode in the low resistance direction thereof, a second plurality of diodes comprising the means for connecting the switching voltages to each capacitor.
Claim 4
Dependent Claim
79 words
A capacitor store as claimed in claim 2, wherein each transistor of both conductivity types has an emitter and a collector, wherein each of the second plurality of diodes is connected to a separate collector of each transistor in the series, wherein the diodes of the first plurality of diodes are base-emitter diodes ot two multi-emitter transistors, and whereby each multi-emitter transistor is of the same conductivity type as the collector of the transistor to which it is connected.
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |