US3671771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A charge amplifier for a bucket brigade capacitor store
Assignee: US Philips Corp
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Filing: 1970-08-20
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Granted: 1972-06-20
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Expires: 1990-08-20
Abstract
Abstract A charge amplifier for a bucket brigade storage circuit uses two transistors, a pair of diodes and two auxiliary capacitors connected in the charging path of one of the bucket brigade capacitors for amplifying the capacitor charge of the bucket brigade capacitor without reducing the permissible driving range of the bucket brigade storage circuit.
Inventors
- 👤 Frederik Leonard Joha Sangster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:07
CPC Classifications
G; G11; G11C; G11C27/00; G11C27/04; G11C19/00; G11C19/18; G11C19/182; G11C19/184; G11C19/186
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
154 words
A capacitor store comprising a plurality of transistors having serially interconnected collector-emitter paths wherein the bases of adjacent transistors are connected to switching voltages operating in phase opposition, comprising a separate storage capacitor connected in parallel with the collector base path of each transistor in the capacitor store, a first auxiliary transistor, a first auxiliary capacitor, a second auxiliary transistor, a diode, means for connecting the first auxiliary capacitor to the base of the first auxiliary transistor through the diode, means for serially connecting the base emitter path of the first auxiliary transistor and the first auxiliary capacitor across a selected storage capacitor of the capacitor store, means for connecting the emitter of the first auxiliary transistor to the collector of the second auxiliary transistor, and means for connecting the side of the first auxiliary capacitor remote from the selected storage capacitor to an emitter of the transistor which succeeds the selected storage capacitor.
Claim 2
Dependent Claim
154 words
A capacitor store comprising a plurality of transistors having serially interconnected collector-emitter paths wherein the bases of adjacent transistors are connected to switching voltages operating in phase opposition, comprising a separate storage capacitor connected in parallel with the collector base path of each transistor in the capacitor store, a first auxiliary transistor, a first auxiliary capacitor, a second auxiliary transistor, a diode, means for connecting the first auxiliary capacitor to the base of the first auxiliary transistor through the diode, means for serially connecting the base emitter path of the first auxiliary transistor and the first auxiliary capacitor across a selected storage capacitor of the capacitor store, means for connecting the emitter of the first auxiliary transistor to the collector of the second auxiliary transistor, and means for connecting the side of the first auxiliary capacitor remote from the selected storage capacitor to an emitter of the transistor which succeeds the selected storage capacitor.
Claim 3
Dependent Claim
36 words
A capacitor store as claimed in claim 1, further comprising a second auxiliary capacitor, and means for connecting the emitter of the second auxiliary transistor to a point of constant potential through the second auxiliary capacitor.
Claim 4
Dependent Claim
37 words
A capacitor store as claimed in claim 1, further comprising a second diode, aNd means for connecting the emitter of the second auxiliary transistor to the switching voltage source for the capacitor store through the second diode.
Claim 5
Dependent Claim
37 words
A capacitor store as claimed in claim 1, further comprising means for connecting the base of the second auxiliary transistor to a side of the first auxiliary capacitor remote from the emitter of the first auxiliary transistor.
Claim 6
Dependent Claim
35 words
A capacitor store as claimed in claim 2, wherein the base of the second auxiliary transistor is connected to a terminal of the first auxiliary capacitor remote from the emitter of the first auxiliary transistor.
Claim 7
Dependent Claim
35 words
A capacitor store as claimed in claim 3, wherein the base of the second auxiliary transistor is connected to a terminal of the first auxiliary capacitor remote from the emitter of the second auxiliary transistor.
Claim 8
Dependent Claim
24 words
A capacitor store as claimed in claim 1, wherein substantially all of the components of the capacitor store are integrated in a semiconductor body.
References Cited (Backward Citations)
US3546490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |