Patent US3584210A successfully refreshed from Google Patents.
US3584210A
Expired / Lapsed
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Electrical function generators using breakpoint unidirectionally conductive devices
Assignee: EMI Ltd
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Filing: 1968-12-09
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Granted: 1971-06-08
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Expires: 1988-12-09
Abstract
Abstract An electrical function generator of the type which employs breakpoint unidirectionally conductive devices includes a signal source and a source of bias potential, each coupled via linear impedance means to a connecting point. The connecting point is coupled to a load via a first unidirectionally conductive device and the connecting point is also coupled directly to a reference potential via a second unidirectionally conductive device connected reversely to the first device. By this means, the effect of capacitance associated with the first device, when nonconductive, is reduced and the input impedance presented to the signal source is substantially constant.
Inventors
- 👤 Anthony John Shawcross Udall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:08
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/26; G06G7/28
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
145 words
An electrical function generator comprising a signal source, a source of bias potential and a generating circuit, the circuit comprising: a. a first two electrode unidirectionally conductive device, b. a second two electrode unidirectionally conductive device, c. linear impedance means connected from said signal source to a connecting point formed between dissimilar electrodes of said devices, d. linear impedance means connected from said source of bias potential to said connecting point, e. the free electrode of said first device being coupled to an output terminal of said circuit, and f. the free electrode of said second device being connected to a reference potential in such a way that the said two devices are rendered conductive and nonconductive in substantially complementary fashion, and the effect of stray capacitance associated with said first device in its nonconductive state is reduced by the presence of said second device.
Claim 2
Dependent Claim
145 words
An electrical function generator comprising a signal source, a source of bias potential and a generating circuit, the circuit comprising: a. a first two electrode unidirectionally conductive device, b. a second two electrode unidirectionally conductive device, c. linear impedance means connected from said signal source to a connecting point formed between dissimilar electrodes of said devices, d. linear impedance means connected from said source of bias potential to said connecting point, e. the free electrode of said first device being coupled to an output terminal of said circuit, and f. the free electrode of said second device being connected to a reference potential in such a way that the said two devices are rendered conductive and nonconductive in substantially complementary fashion, and the effect of stray capacitance associated with said first device in its nonconductive state is reduced by the presence of said second device.
Claim 3
Dependent Claim
50 words
A generator according to claim 1 including a plurality of generating circuits, each connected to said signal source, and each connected to said source of bias potential in such a way that the said circuits become operative at different signal levels the output terminals of said circuits being connected together.
Claim 4
Dependent Claim
12 words
A generator according to claim 1 wherein said devices comprise semiconductor diodes.
Claim 5
Dependent Claim
20 words
A generator according to claim 1 including means tending to nullify the effect of bias current on the signal source.
Claim 6
Dependent Claim
18 words
A generator according to claim 1 in which the said common output terminal is coupled to a load.
Claim 7
Dependent Claim
17 words
A generatoR according to claim 5 in which the load comprises the input impedance of an amplifier.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |