Time-based integrated potentiostat
First Claim
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1. An integrated potentiostat comprising:
- a voltage controller for maintaining within a predetermined range a potential between a reference electrode and a working electrode in an electrochemical cell, a first input of said voltage connector connected to said reference electrode and a second input of said voltage controller connected to said working electrode; and
a capacitor coupled to said working electrode for supplying or receiving a current through said reference or working electrode, wherein a rate of change of a voltage across said capacitor is functionally related to the current and thereby provides a time equivalent of said current.
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Abstract
An integrated potentiostat includes a voltage controller that maintains within a predetermined range a potential between a reference electrode and a working electrode in an electrochemical cell. The integrated potentiostat further includes a capacitor that supplies or receives a current through the working electrode or reference electrode of the electrochemical cell. The rate of change of a voltage across the capacitor is functionally related to the current and thus provides a time equivalent of the current.
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Citations
17 Claims
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1. An integrated potentiostat comprising:
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a voltage controller for maintaining within a predetermined range a potential between a reference electrode and a working electrode in an electrochemical cell, a first input of said voltage connector connected to said reference electrode and a second input of said voltage controller connected to said working electrode; and
a capacitor coupled to said working electrode for supplying or receiving a current through said reference or working electrode, wherein a rate of change of a voltage across said capacitor is functionally related to the current and thereby provides a time equivalent of said current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A bidirectional integrated potentiostat comprising:
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first and second voltage controller coupled to a reference electrode of an electrochemical cell and a second voltage controller coupled to a working electrode of said electrochemical cell, said first and second voltage controllers for maintaining within a predetermined range a potential difference between said reference electrode and said working electrode in said electrochemical cell;
a first capacitor electrically connected to said reference electrode for supplying a current through said reference electrode, wherein a rate of change of a voltage across said first capacitor is functionally related to the current supplied and thereby provides a time equivalent of the current supplied; and
a second capacitor electrically connected to said working electrode for receiving a current through said working electrode, wherein a rate of change of a voltage across said second capacitor is functionally related to the current received and thereby provides a time equivalent of the current received. - View Dependent Claims (11, 12, 13, 14)
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15. A method for generating a time equivalent of a current flowing in an electrode of an electrochemical cell, the method comprising:
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maintaining within a predetermined range a voltage between a reference electrode contained in the electrochemical cell and a working electrode contained in the electrochemical cell;
passing a current to or from the electrochemical cell through the working electrode or reference electrode to discharge or charge a capacitor, wherein a rate of change of a voltage across the capacitor is functionally related to the current and thereby provides a time equivalent of the current. - View Dependent Claims (16, 17)
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Specification