US3562550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for generating hyperbolic functions
Assignee: Individual
•
Filing: 1967-09-25
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Granted: 1971-02-09
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Expires: 1987-09-25
Abstract
Abstract Apparatus for and methods of electrically simulating a hyperbolic function are disclosed. The function generator comprises suitably interconnected capacitor, constant voltage source and nonlinear circuit element; charging or discharge current of the capacitor being supplied through the nonlinear element which may be a transistor connected as a diode. Discharge of the capacitor is controlled by a suitably connected solid state switch.
Inventors
- 👤 Harry Fein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:40
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/24
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
130 words
A hyperbolic function generator comprising: a constant voltage source; capacitive circuit means; output circuit means including input and output terminals, an electrical current commensurate with the function to be generated being measured at said output terminal; an element which produces an output current commensurate with an exponential function of an applied voltage, said element being connected between a first terminal of said capacitive circuit means and the input terminal of said output circuit means; means connecting the other terminal of said capacitive circuit means to a first polarity terminal of said constant source; normally open switch means connected to said capacitive circuit means and said constant voltage source for selectively controlling the charging of said capacitive circuit means; and means for applying control signals to said normally open switch means.
Claim 2
Dependent Claim
130 words
A hyperbolic function generator comprising: a constant voltage source; capacitive circuit means; output circuit means including input and output terminals, an electrical current commensurate with the function to be generated being measured at said output terminal; an element which produces an output current commensurate with an exponential function of an applied voltage, said element being connected between a first terminal of said capacitive circuit means and the input terminal of said output circuit means; means connecting the other terminal of said capacitive circuit means to a first polarity terminal of said constant source; normally open switch means connected to said capacitive circuit means and said constant voltage source for selectively controlling the charging of said capacitive circuit means; and means for applying control signals to said normally open switch means.
Claim 3
Dependent Claim
31 words
The apparatus of claim 1 wherein said normally open switch means is connected between said first terminal of said capacitive circuit means and the second polarity terminal of said voltage source.
Claim 4
Dependent Claim
17 words
The apparatus of claim 2 wherein said element which produces an exponential current comprises, a semiconductor device.
Claim 5
Dependent Claim
16 words
The apparatus of claim 3 wherein said semiconductor device comprises, a transistor connected as a diode.
Claim 6
Dependent Claim
21 words
The apparatus of claim 1 wherein said voltage source, capacitive circuit means and exponential current producing element are connected in series.
Claim 7
Dependent Claim
18 words
The apparatus of claim 5 wherein said switch means is connected in parallel with said capacitive circuit means.
Claim 8
Dependent Claim
17 words
The apparatus of claim 6 wherein said element which produces an exponential current comprises, a semiconductor device.
Claim 9
Dependent Claim
16 words
The apparatus of claim 7 wherein said semiconductor device comprises, a transistor connected as a diode.
Claim 10
Independent Claim
52 words
A method of electrically simulating a hyperbolic function comprising the steps of: applying a voltage from a constant voltage source to a capacitor; periodically discharging the capacitor; and measuring the current through a device which exhibits an exponential current verses voltage response, the exponential device being connected in series with the capacitor.
Claim 11
Independent Claim
52 words
A method of electrically simulating a hyperbolic function comprising the steps of: applying a voltage from a constant voltage source to a capacitor; periodically discharging the capacitor; and measuring the current through a device which exhibits an exponential current verses voltage response, the exponential device being connected in series with the capacitor.
Claim 12
Dependent Claim
28 words
The method of claim 9 wherein the charging current of the cApacitor is supplied through the exponential device and is measured after each periodic discharge of the capacitor.
Claim 13
Dependent Claim
19 words
The method of claim 9 wherein the capacitor discharges through the exponential device and the discharge current is measured.
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |