Patent EP0117736A2 successfully refreshed from Google Patents.
US4499552A
Expired / Lapsed
US
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Electrochemical cell simulating circuit arrangement
Assignee: International Business Machines Corp
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Filing: 1981-12-31
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Granted: 1985-02-12
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Expires: 2001-12-31
Abstract
Abstract An electronic circuit arrangement effecting current flow simulating the faradaic current, oxidation reduction potential and the like of an electrochemical cell encompasses two key concepts. The first recognizes that since the semi-integral of the cell current effectively deconvolves the diffusion aspect of the phenomenon with the resultant describing the surface concentration of reacted species, then the semiderivative of a function describing a surface concentration of reacted species results in an output representing the cell current, including diffusion. The second is embodied in a circuit arrangement properly simulating this concentration behavior cell double layer potential and in yielding an output proportional to the surface concentration of reactant species corresponding to that potential in response to applied cell barrier potential.
Inventors
- 👤 Kay K. Kanazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:43
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/62; G06G7/58
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
85 words
An electronic circuit for simulating the electrical characteristics of an electrochemical cell comprising: a plurality of impedance elements connected in series to partially simulate an electrochemical cell; simulator circuit means for producing potential and current which define the faradaic resistance of said electrochemical cell; means for connecting said simulator circuit means across one of said impedance elements; said simulator circuit means including electronic impedance simulating circuitry for generating said current; and electronic current time-processing circuitry connected in series across said one of said impedance elements.
Claim 2
Dependent Claim
85 words
An electronic circuit for simulating the electrical characteristics of an electrochemical cell comprising: a plurality of impedance elements connected in series to partially simulate an electrochemical cell; simulator circuit means for producing potential and current which define the faradaic resistance of said electrochemical cell; means for connecting said simulator circuit means across one of said impedance elements; said simulator circuit means including electronic impedance simulating circuitry for generating said current; and electronic current time-processing circuitry connected in series across said one of said impedance elements.
Claim 3
Dependent Claim
27 words
An electronic circuit as defined in claim 1, and wherein said electronic impedance simulating circuitry comprises a pair of semiconductor diode devices connected in back-to-back series relationship.
Claim 4
Dependent Claim
31 words
An electronic circuit as defined in claim 2, additionally comprising, electronic circuitry connected in parallel with said diode devices and arranged for compensating for the finite back-resistance of said diode devices.
Claim 5
Dependent Claim
18 words
An electronic circuit as defined in claim 1, and wherein said electronic current time-processing circuitry comprises differentiating circuitry.
Claim 6
Dependent Claim
187 words
An electronic circuit for simulating the electrical characteristics of an electrochemical cell comprising: a first and a second interconnection terminal; a first differential amplifier circuit having one input terminal coupled to said first interconnection terminal, having another input terminal and having an output terminal; a second differential amplifer circuit having a first input terminal, having a second input terminal connected to a point of reference potential and having an output terminal; a resistance simulator circuit having one terminal connected to said output terminal of said first amplifier circuit and having another terminal coupled to said first input terminal of said second amplifier circuit; a third amplifier circuit having an input terminal coupled to the output terminal of said second amplifier circuit and having an output terminal; a first resistor connected between the output terminal of said third amplifier circuit and said first interconnection terminal; and a second resistor connected between the output terminal of said second amplifier circuit and the second interconnection terminal whereby the circuit coupled between said first and said second interconnection terminals is operable to substantially simulate the faradaic resistance of said electrochemical cell.
Claim 7
Dependent Claim
187 words
An electronic circuit for simulating the electrical characteristics of an electrochemical cell comprising: a first and a second interconnection terminal; a first differential amplifier circuit having one input terminal coupled to said first interconnection terminal, having another input terminal and having an output terminal; a second differential amplifer circuit having a first input terminal, having a second input terminal connected to a point of reference potential and having an output terminal; a resistance simulator circuit having one terminal connected to said output terminal of said first amplifier circuit and having another terminal coupled to said first input terminal of said second amplifier circuit; a third amplifier circuit having an input terminal coupled to the output terminal of said second amplifier circuit and having an output terminal; a first resistor connected between the output terminal of said third amplifier circuit and said first interconnection terminal; and a second resistor connected between the output terminal of said second amplifier circuit and the second interconnection terminal whereby the circuit coupled between said first and said second interconnection terminals is operable to substantially simulate the faradaic resistance of said electrochemical cell.
Claim 8
Dependent Claim
45 words
An electronic circuit as defined in claim 5, and wherein said simulator circuit comprises two diode devices arranged in opposing conducting relationship in a series circuit between the output terminal of said first amplifier circuit and said first input terminal of said second amplifier circuit.
Claim 9
Dependent Claim
19 words
An electronic circuit as defined in claim 6, and wherein said diode devices are connected in back-to-back series relationship.
Claim 10
Dependent Claim
20 words
An electronic circuit as defined in claim 6, and wherein said diode devices have the anode electrodes connected in common.
Claim 11
Dependent Claim
26 words
An electronic circuit as defined in claim 7, additionally comprising: a compensating operational amplifier circuit connected across said simulator circuit and having an adjustable feedback resistor.
Claim 12
Dependent Claim
30 words
An electronic circuit as defined in claim 7, additionally comprising: a differentiating circuit interposed in the coupling between said simulator circuit and the input terminal of said third amplifier circuit.
Claim 13
Dependent Claim
26 words
An electronic circuit as defined in claim 10, and wherein said differentiating circuit comprises a series capacitor and the input circuitry of said third amplifier circuit.
Claim 14
Dependent Claim
27 words
An electronic circuit as defined in claim 10, and wherein said differentiating circuit comprises a Warburg impedance network and the input circuitry of said third amplifier circuit.
Claim 15
Dependent Claim
24 words
An electronic circuit as defined in claim 7, additionally comprising: circuitry connected to said diode devices for further correcting for non-linearity of said devices.
Claim 16
Dependent Claim
22 words
An electronic circuit as defined in claim 13, and wherein said circuitry comprises adjustable potential divider circuitry and polarity selecting switching means.
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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) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |